Biodegradation test device

Abstract

The present invention relates to a biodegradation test device comprising: a treatment unit which supplies external air to a chamber unit accommodating a target material for testing biodegradation, or which treats gas discharged from the chamber unit; and an inspection unit for inspecting the gas discharged from the chamber unit, wherein the treatment unit includes: a distribution part, which receives and distributes the external air so as to transfer at least a part of the external air to the chamber unit; a flow rate regulation part, which is provided downstream of the distribution part and regulates the flow rate of the air; a flow selection part for transferring, to the inspection unit, at least a part of the gas discharged from the chamber unit; and a control part for controlling the distribution part, the flow rate regulation part and the flow selection part.

Description

Biodegradation test device

[0001] The present invention relates to a biodegradation test device.

[0002] Generally, "biodegradability" refers to the ability of a compound to be completely broken down into biological resources such as methane, carbon dioxide, and water, or inorganic salts, by microorganisms and / or natural environmental factors. Biodegradation is specifically distinguished between aerobic decomposition, which requires a supply of oxygen, and anaerobic decomposition, which does not.

[0003] In addition, "biodegradable polymer compound" refers to a polymer compound used in molded products, packaging materials, sanitary products, agricultural products, etc., which is completely decomposed into water, carbon dioxide, methane gas, etc. by the biological action of microorganisms by simply burying it in a landfill when discarded.

[0004] Recently, various international environmental agreements in various fields have been promoted and implemented one after another to protect the global environment. Along with the strengthening of these environmental regulations, efforts are being made to develop more environmentally friendly products as consumer awareness of chemical products and various consumer goods changes.

[0005] However, despite the rapid increase in products manufactured from biodegradable polymers and the expansion of the market, rapid, quantitative, and reproducible measurement of the biodegradability of these polymers remains challenging. Accordingly, various studies are being conducted to more effectively measure biodegradability.

[0006] Moreover, biodegradability testing is a long-term process that lasts for several months, making the stability of the testing equipment essential. However, conventional testing methods suffer from the problem of having to restart testing from the beginning if the control device connected to the testing equipment is disconnected due to external circumstances. This significantly delays the testing schedule.

[0007] The present invention was created to solve the problems of the prior art as described above, and the purpose of the present invention is to provide a biodegradation test device that can increase the reliability of test results based on electronic control while ensuring the accuracy of the test when testing biodegradation such as aerobic decomposition or anaerobic decomposition.

[0008] A biodegradation test device according to one aspect of the present invention comprises: a processing unit for supplying outside air to a chamber unit containing a target material for testing biodegradation or for processing a gas discharged from the chamber unit; and a testing unit for testing the gas discharged from the chamber unit, wherein the processing unit comprises: a distribution unit for receiving outside air, distributing the air, and delivering at least a portion of the air to the chamber unit; a flow control unit provided downstream of the distribution unit for controlling the flow rate of the air; a flow selection unit for delivering at least a portion of the gas discharged from the chamber unit to the testing unit; and a control unit for controlling the distribution unit, the flow control unit, and the flow selection unit, wherein the flow control unit comprises: a flow supply unit provided downstream of the distribution unit for delivering a fluid delivered from the distribution unit to the chamber unit; and a flow bypass unit provided downstream of the distribution unit for delivering a fluid delivered from the distribution unit to the flow selection unit bypassing the chamber unit.

[0009] Specifically, the control unit is connected to an external control device, receives test conditions of the chamber unit from the control device, and controls the flow rate control unit so that the test conditions of the chamber unit are maintained regardless of whether the control device is connected during the period from the start to the end of the biodegradation test.

[0010] Specifically, the control unit includes a memory that temporarily stores measurement data of the inspection unit when the connection with the control device is disconnected, and can transmit the measurement data stored in the memory to the control device when the connection with the control device is restored.

[0011] Specifically, the chamber unit includes a plurality of test chambers that accommodate the target material, the distribution unit distributes external air to one of the test chambers, and the flow selection unit can deliver gas discharged from the test chamber where the test is being performed to the inspection unit.

[0012] Specifically, the test chamber includes a beaker in which the target substance is stored; a housing configured to surround at least a portion of the lower part, upper part, and side of the beaker; and a cover fastened to the upper end of the housing to seal the upper opening of the beaker and having an air inlet and a gas outlet, wherein the housing includes a lower plate that surrounds the lower surface of the beaker, an upper ring that surrounds the upper part of the beaker, and a plurality of supports provided between the lower plate and the upper ring on the side of the beaker, and the cover may include an upper plate in which the air inlet is provided in a central portion, a gas outlet is provided in a peripheral portion, and a cap having a polygonal cross-section and a rod insertion port is provided in the peripheral portion, and which surrounds the upper surface of the beaker, and a ring provided on the periphery of the upper plate to fasten the upper plate to the upper ring so that the upper plate seals the beaker.

[0013] Specifically, the flow bypass device can clear the distribution unit, the flow selection unit, and the inspection unit with external air when the biodegradation test is stopped or ended or the test chamber that is the subject of the biodegradation test is changed.

[0014] A biodegradation test device according to one aspect of the present invention comprises: a processing unit for supplying outside air to a chamber unit containing a target material for testing biodegradation or for processing a gas discharged from the chamber unit; and a testing unit for testing the gas discharged from the chamber unit, wherein the processing unit comprises: a distribution unit for receiving outside air and distributing it to deliver at least a portion of the air to the chamber unit; a flow control unit provided downstream of the distribution unit for controlling the flow rate of the air; a flow selection unit for delivering at least a portion of the gas discharged from the chamber unit to the testing unit; and a droplet separation unit for separating droplets from the gas discharged from the chamber unit, wherein the droplet separation unit comprises: a first filter provided between the chamber unit and the flow selection unit for collecting droplets; and a first pump for delivering droplets separated by the first filter between the flow control unit and the chamber unit.

[0015] Specifically, the droplet separation unit may further include a second filter provided between the fluid selection unit and the inspection unit to collect droplets; and a second pump that discharges droplets separated by the second filter to the outside.

[0016] A biodegradation test device according to one aspect of the present invention comprises a processing unit for supplying outside air to a chamber unit containing a target material for biodegradation testing or for processing a gas discharged from the chamber unit; and a testing unit for testing the gas discharged from the chamber unit, wherein the processing unit comprises: a distribution unit for receiving outside air, distributing the received air, and delivering at least a portion of the received air to the chamber unit; a flow control unit provided downstream of the distribution unit for controlling the flow rate of the air; and a flow selection unit for delivering at least a portion of the gas discharged from the chamber unit to the testing unit, wherein the chamber unit comprises a plurality of test chambers for containing the target material, the distribution unit for distributing outside air to any one of the test chambers, and the flow selection unit for delivering a gas discharged from the test chamber in which a test is being performed to the testing unit, and wherein the testing unit comprises: a status sensor for sensing temperature, pressure, and humidity of the gas delivered from the flow selection unit; an oxygen sensor for detecting oxygen in the gas delivered from the flow selection unit; And it includes a carbon dioxide sensor that detects carbon dioxide in the gas transmitted from the fluid selection unit.

[0017] Specifically, the inspection unit further includes a methane sensor that detects methane in the gas transmitted from the fluid selection unit, calculates the measured total organic carbon amount by adding the organic carbon amounts for carbon dioxide and methane, and calculates the biodegradability by dividing the measured total organic carbon amount by the theoretical total organic carbon amount.

[0018] Specifically, at least one of the state sensor, the oxygen sensor, and the carbon dioxide sensor may include a high-concentration sensor having a detection range of relatively high concentration and a preset error rate; and a low-concentration sensor having a detection range of relatively low concentration and a preset error rate.

[0019] Specifically, the carbon dioxide sensor includes a high-concentration carbon dioxide sensor having a detection range of relatively high concentration and a preset error rate; and a low-concentration carbon dioxide sensor having a detection range of relatively low concentration and a preset error rate, and the flow rate control unit controls the flow rate of air so that carbon dioxide included in gas discharged from the chamber unit does not go beyond the detection range of the high-concentration carbon dioxide sensor, and the carbon dioxide sensor can perform inspection using the low-concentration carbon dioxide sensor at least for a section in which the carbon dioxide difference between an inoculum (Blank) and a target material is less than the error rate of the high-concentration carbon dioxide sensor.

[0020] Specifically, the air filter unit further includes an air filter unit for removing carbon dioxide from outside air flowing into the treatment unit, and the air filter unit may include: two or more scrubbers filled with a carbon dioxide absorbing material; an inlet line for delivering outside air to the scrubbers; an exhaust line for delivering outside air discharged from the scrubbers to the treatment unit; and a switching line for connecting the scrubbers so that the flow of outside air is switched for the two or more scrubbers.

[0021] A biodegradation test device according to one aspect of the present invention comprises: a processing unit for supplying outside air to a chamber unit containing a target material for biodegradation testing or for processing a gas discharged from the chamber unit; and a testing unit for testing the gas discharged from the chamber unit, wherein the processing unit comprises: a distribution unit for receiving outside air, distributing the air, and delivering at least a portion of the air to the chamber unit; a flow control unit provided downstream of the distribution unit for controlling the flow rate of the air; a flow selection unit for delivering at least a portion of the gas discharged from the chamber unit to the testing unit; and a test change unit for changing the test conditions of the chamber unit, wherein the test change unit applies open-pass test conditions by allowing outside air to be delivered to the chamber unit through the distribution unit and the flow control unit, and applies closed-circuit test conditions by recirculating the gas discharged from the testing unit into the chamber unit.

[0022] Specifically, the apparatus further comprises: a vent unit for discharging gas passing through the inspection unit to the outside; a gas circulation unit connected between the flow control unit and the chamber unit downstream of the inspection unit; and a droplet separation unit for separating droplets from gas discharged from the chamber unit and delivering them to the chamber unit, wherein the gas circulation unit is connected downstream of the flow control unit and downstream of a point where droplets are introduced by the droplet separation unit, and the test change unit can apply open-pass test conditions or closed-circuit test conditions by controlling a first valve provided at a point where droplets are introduced by the droplet separation unit downstream of the flow control unit and a second valve provided at a point where the gas circulation unit branches downstream of the inspection unit.

[0023] The biodegradation test device according to the present invention can maintain a constant biodegradation test environment based on electronic control during measurement according to a biodegradation test, thereby increasing the reliability of the test results.

[0024] Figure 1 is a perspective view of a biodegradation test device according to a first embodiment of the present invention.

[0025] Figure 2 is a block diagram of a biodegradation test device according to the first embodiment of the present invention.

[0026] Figure 3 is a block diagram of a biodegradation test device according to the first embodiment of the present invention.

[0027] Figure 4 is a block diagram of a biodegradation test device according to the first embodiment of the present invention.

[0028] Figure 5 is a block diagram of a biodegradation test device according to the first embodiment of the present invention.

[0029] Figure 6 is a partial block diagram of a biodegradation test device according to the first embodiment of the present invention.

[0030] Fig. 7 is a drawing showing a display of a biodegradation test device according to the first embodiment of the present invention.

[0031] Figure 8 is a drawing showing a display of a biodegradation test device according to the first embodiment of the present invention.

[0032] Figure 9 is a side view of a test chamber of a biodegradation test device according to the first embodiment of the present invention.

[0033] Figure 10 is a perspective view of a test chamber of a biodegradation test device according to the first embodiment of the present invention.

[0034] Fig. 11 is a conceptual diagram illustrating data grouping of a test chamber of a biodegradation test device according to a first embodiment of the present invention. Fig. 12 is a block diagram of a biodegradation test device according to a second embodiment of the present invention.

[0035] Figure 13 is a block diagram of a biodegradation test device according to a second embodiment of the present invention.

[0036] Figure 14 is a block diagram of a biodegradation test device according to a second embodiment of the present invention.

[0037] Figure 15 is a block diagram of a biodegradation test device according to a second embodiment of the present invention.

[0038] Fig. 16 is a perspective view of an air filter unit of a biodegradation test device according to a third embodiment of the present invention.

[0039] Figure 17 is a front view of the air filter unit of the biodegradation test device according to the third embodiment of the present invention.

[0040] Fig. 18 is a rear view of the air filter unit of the biodegradation test device according to the third embodiment of the present invention.

[0041] Figure 19 is a conceptual diagram of an air filter unit of a biodegradation test device according to a third embodiment of the present invention.

[0042] The present invention is susceptible to various modifications and embodiments. Specific embodiments are illustrated and described in detail in the drawings. However, this is not intended to limit the present invention to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention.

[0043] In describing each drawing, similar reference numerals are used to refer to similar components. Terms such as "first," "second," etc. may be used to describe various components, but these components are not limited by these terms. These terms are used solely to distinguish one component from another. For example, the term "and / or" includes a combination of multiple related items described or any of multiple related items described.

[0044] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by those of ordinary skill in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning within the context of the relevant technology, and should not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0045] Certain terms used in the following description are provided to aid understanding of the present invention, and the use of these specific terms may be modified in other forms without departing from the technical spirit of the present invention. The present invention is susceptible to various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, but should be understood to include all modifications, equivalents, and alternatives included within the spirit and technical scope of the present invention.

[0046] Hereinafter, the configuration of the biodegradation test device according to the present invention is described in detail through the attached drawings.

[0047]

[0048] Fig. 1 is a perspective view of a biodegradation test device according to a first embodiment of the present invention, Figs. 2 to 5 are block diagrams of a biodegradation test device according to a first embodiment of the present invention, and Fig. 6 is a partial block diagram of a biodegradation test device according to a first embodiment of the present invention. For reference, Figs. 4 and 5 are drawings in which the flow of fluid is indicated with a bold line compared to Fig. 3.

[0049] In addition, FIGS. 7 and 8 are drawings showing the display of the biodegradation test device according to the first embodiment of the present invention, FIG. 9 is a side view of the test chamber of the biodegradation test device according to the first embodiment of the present invention, and FIG. 10 is a perspective view of the test chamber of the biodegradation test device according to the first embodiment of the present invention. In addition, FIG. 11 is a conceptual diagram explaining data grouping of the test chamber of the biodegradation test device according to the first embodiment of the present invention.

[0050] Referring to FIGS. 1 to 11, a biodegradation test device (1) according to the first embodiment of the present invention includes a chamber unit (100), a processing unit (200), and an inspection unit (300).

[0051] For reference, the biodegradation test device (1) according to the present embodiment may include one or more cases (not shown) that house the chamber unit (100), the treatment unit (200), etc., either integrally or individually. The case may be equipped with a highly visible lighting unit (not shown, LED) on the front, etc., to notify the user of the status of the internal configuration and any abnormalities, thereby prompting prompt action. In addition, the case may be equipped with a display (400) to be described later.

[0052]

[0053] The chamber unit (100) accommodates a target material for testing biodegradation. The chamber unit (100) is illustrated on the left side of FIG. 1, and the size of the chamber unit (100) can be determined in various ways depending on the number of test chambers (110) included in the chamber unit (100).

[0054] The chamber unit (100) may include a plurality of test chambers (110) that accommodate a target material. For example, in the case of FIG. 1, the chamber unit (100) includes a total of 12 test chambers (110). In addition, the chamber unit (100) may include a temperature control unit (120) that adjusts the temperature of the space in which the test chambers (110) are accommodated.

[0055] The temperature control unit (120) can implement a constant temperature function for the test chamber (110) by controlling the internal temperature of the chamber unit (100). The temperature control unit (120) is provided with a structure capable of heating or cooling, etc., and may include a known air conditioning facility or a Peltier element, etc.

[0056] Referring to FIG. 2, the temperature control unit (120) is connected to an external control device (600) to be described later, and can receive a signal from the control device (600) and be assigned a temperature control range within the chamber unit (100).

[0057] In addition, as illustrated in FIG. 2, the chamber unit (100) is provided with a display (400). The display (400) outputs the temperature control results by the temperature control unit (120) so that the user can visually check them. The display (400) will be described again below.

[0058] The temperature control unit (120) receives the temperature range to be controlled from an external control device (600) and, after being operated, can operate on its own to maintain the temperature range even if the connection with the control device (600) is cut off. In other words, the temperature control unit (120) is not continuously controlled by the control device (600), but can be operated on its own after receiving the necessary signal before the start of the test.

[0059] Alternatively, the temperature control unit (120) of the chamber unit (100) may be controlled by the control unit (250) described later. The control unit (250) may implement control in case a communication failure occurs or the communication connection is disconnected between the external control device (600) and the present embodiment, and at this time, the control unit (250) may also be involved in temperature control of the chamber unit (100). In this case, the temperature control unit (120) may be able to prepare for a short circuit with the external control device (600), and the present embodiment may continuously maintain the temperature conditions of the test chamber (110).

[0060] The test chamber (110) stores the target substance while creating a biodegradable environment for the target substance. The test chamber (110) may be configured as a constant temperature chamber so that its interior can be maintained at a constant temperature. The test chamber (110) will be described in detail with reference to FIGS. 9 and 10 .

[0061] Referring to FIGS. 9 and 10, the test chamber (110) includes a beaker (111), a housing (112), and a cover (113). The beaker (111) is a configuration in which a target substance is stored and may have a relatively cylindrical shape. Of course, the shape of the beaker (111) is not limited to this, and may be formed into a size and shape that can introduce the target substance and create an appropriate aerobic environment.

[0062] The beaker (111) may be formed in a form in which the bottom is closed and only the top is open, and the inside of the beaker (111) may be closed by covering the top of the beaker (111) with a cover (113). Of course, since the cover (113) has a structure that allows the flow of air and gas, even if the cover (113) is closed, the beaker (111) is not formed as a sealed space. However, the internal space of the beaker (111) is blocked from the outside except for the air inlet (1133) and gas outlet (1134) provided in the cover (113).

[0063] The bottom of the beaker (111) may be provided with a housing (112). If the beaker (111) has a closed bottom and an open top, the housing (112) may have a structure that simply engages with the bottom of the beaker (111). In this case, the housing (112) has a function for tightly fixing the cover (113) to the beaker (111).

[0064] On the other hand, the beaker (111) may be formed in a form in which the bottom and top are open. In this case, the top of the beaker (111) may be closed by a cover (113) as described above, and the bottom of the beaker (111) may be provided to be closed by a housing (112).

[0065] Since the gas generated from the inside of the beaker (111) during the biodegradation test must be transferred to the inspection unit (300) for inspection without leakage or introduction of foreign substances, the part where the beaker (111) and the cover (113) come into contact and the part where the beaker (111) and the housing (112) come into contact are made to maintain airtightness.

[0066] The housing (112) may be provided to surround the bottom and top of the beaker (111). The portion of the housing (112) surrounding the bottom of the beaker (111) may vary depending on the shape of the beaker (111). For example, if the bottom of the beaker (111) is closed, the portion of the housing (112) surrounding the bottom of the beaker (111) may be provided to simply surround the bottom perimeter of the beaker (111). On the other hand, if the bottom of the beaker (111) is open, the portion of the housing (112) surrounding the bottom of the beaker (111) must be structured to maintain airtightness while making contact with the beaker (111). In this case, an elastic ring (not shown) or the like may be applied to the portion of the housing (112) that engages with the bottom of the beaker (111) to ensure airtightness.

[0067] The housing (112) is provided to surround the upper part of the beaker (111). A portion of the housing (112) surrounding the upper part of the beaker (111) can be used for firmly fastening the cover (113). That is, the housing (112) is fixedly installed at a certain point in the beaker (111), and the cover (113) is connected to the housing (112) via a ring (1132), thereby inducing airtightness inside the beaker (111).

[0068] The housing (112) may be arranged to surround at least a portion of the side of the beaker (111) in addition to the bottom and top of the beaker (111). This is to connect the portion of the housing (112) provided at the bottom of the beaker (111) and the portion provided at the top of the beaker (111).

[0069] Specifically, the housing (112) includes a lower plate (1121) that surrounds the lower surface of the beaker (111) and an upper ring (1122) that surrounds the upper portion of the beaker (111). In addition, the housing (112) may include a support (1123) that is provided between the lower plate (1121) and the upper ring (1122) on the side of the beaker (111). Of course, depending on the shape of the beaker (111), the lower plate (1121) may be replaced with a lower ring shape.

[0070] A plurality of supports (1123) are provided between the lower plate (1121) and the upper ring (1122). When the supports (1123) are applied, the position where the upper ring (1122) is placed on the upper part of the beaker (111) can be fixed. At this time, when the cover (113) is fastened to the upper ring (1122) of the housing (112), the sealing of the inside of the beaker (111) by the cover (113) is ensured.

[0071] The cover (113) is fastened to the top of the housing (112) and seals the top opening of the beaker (111). When the cover (113) is closed, the internal space of the beaker (111) can be configured as a space for a biodegradation test. However, the cover (113) may have a gas exhaust port (1134) for emitting gas generated due to biodegradation within the beaker (111) for measuring the results of the biodegradation test.

[0072] In addition, the cover (113) has an air inlet (1133) for injecting air into the beaker (111) for an open-pass biodegradation test. The air inlet (1133) is provided in the central portion, and a gas outlet (1134) may be provided in the peripheral portion of the cover (113). In addition, a nozzle (not shown) is provided in the air inlet (1133) for smoothly delivering air into the interior of the beaker (111), and the nozzle may have a size that extends downwards more than the upper ring (1122) of the housing (112). Through this, the air introduced into the air inlet (1133) is smoothly delivered to the target material inside the beaker (111) without directly escaping to the gas outlet (1134).

[0073] If a closed-loop biodegradation test is required, the gas outlet (1134) in the cover (113) may be opened to connect to the test unit (300), while the air inlet (1133) may be blocked. Alternatively, the present embodiment enables anaerobic testing inside the beaker (111) by blocking the flow upstream of the air inlet (1133), instead of blocking the air inlet (1133) itself provided in the cover (113).

[0074] The cover (113) is provided with a cap (1135) at its peripheral portion. The cap (1135) may be configured to be sealed and may be a portion that maintains a relatively strong connection. However, the cap (1135) has a polygonal cross-section so that it can be opened by a strong external force when necessary. For example, the cap (1135) may be provided for situations such as collecting samples of a target substance.

[0075] Additionally, the cap (1135) may have a rod insertion port (not shown). The rod insertion port may be configured to allow rotation of the cap (1135) while the rod is inserted into the cap (1135). In other words, the cap (1135) is basically sealed in the cover (113), but may allow exceptional opening through a configuration such as a polygonal cross-section or a rod insertion port.

[0076] This cover (113) includes an upper plate (1131) that surrounds the upper surface of the beaker (111), and a ring (1132) that is provided around the upper plate (1131) and fastens the upper plate (1131) to the upper ring (1122). The upper plate (1131) may be provided to be symmetrical with the lower plate (1121) of the housing (112) described above. That is, the lower plate (1121) of the housing (112) may be in contact with the lower surface of the beaker (111), and the upper plate (1131) of the cover (113) may be in contact with the upper surface of the beaker (111). In addition, an air inlet (1133), a gas outlet (1134), and a cap (1135) may be provided on the upper plate (1131).

[0077] A ring (1132) may be radially provided around the circumference of the upper plate (1131). The ring (1132) seals the beaker (111) by fastening the upper plate (1131) to the upper ring (1122). However, the ring (1132) may be configured to facilitate the opening of the beaker (111) by separating the cover (113) from the beaker (111) when necessary. For this purpose, the ring (1132) may be formed of, for example, a cicada ring (1132) that can be opened with one touch.

[0078] Through the configurations described above, the present embodiment can ensure ease of opening and closing while increasing the sealing reliability of the test chamber (110). In addition, various sensors may be provided in the test chamber (110) as needed.

[0079]

[0080] The processing unit (200) supplies outside air to the chamber unit (100) or processes gas discharged from the chamber unit (100). The processing unit (200) continuously supplies outside air to the chamber unit (100), thereby enabling open-pass biodegradation testing for the chamber unit (100). In addition, the processing unit (200) appropriately transfers gas discharged from the chamber unit (100) to the inspection unit (300) so that the results of the biodegradation test can be measured.

[0081] The processing unit (200) may include a distribution unit (210), a flow control unit (220), a flow selection unit (230), a droplet separation unit (240), and a control unit (250).

[0082] The distribution unit (210) (flow divider) receives and distributes external air. The distribution unit (210) is configured to distribute air to deliver external air to the chamber unit (100), and can divide the air into multiple test chambers (110). In addition, the distribution unit (210) can separate the amount of air required for at least one test chamber (110).

[0083] The air flowing into the distribution unit (210) may have passed through a separate filter (not shown), and may also have its pressure appropriately adjusted while passing through a pressure relief valve that may be provided upstream of the distribution unit (210). However, the present embodiment may or may not include filters (241, 243) and pressure relief valves as components.

[0084] The distribution unit (210) can distribute external air to one of the test chambers (110). However, since a flow rate control unit (220) is provided between the distribution unit (210) and the test chamber (110), the air distributed from the distribution unit (210) can be delivered to the test chamber (110) after the flow rate is controlled by the flow rate control unit (220).

[0085] However, there are cases where at least a portion of the air distributed from the distribution unit (210) is not delivered to the test chamber (110). As will be described in detail below, some components (flow bypass (222)) included in the flow control unit (220) can allow the air delivered from the distribution unit (210) to bypass the test chamber (110) and be delivered to the flow selection unit (230) or the inspection unit (300). In such cases, the purpose is to clean air or gas remaining in the distribution unit (210), the flow control unit (220), the flow selection unit (230), and the inspection unit (300).

[0086] However, cleaning of air, etc. and measurement of biodegradation test may not be performed at the same time. Therefore, air distributed from the distribution unit (210) may be delivered to one or more test chambers (110) via the flow control unit (220), or air distributed from the distribution unit (210) may be delivered to the inspection unit (300) etc. via the flow control unit (220) but bypassing (not passing through) the test chamber (110).

[0087] The flow control unit (220) is provided downstream of the distribution unit (210) and controls the flow rate of air. A plurality of flow control units (220) are provided to be allocated to one distribution unit (210), and the distribution unit (210) can distribute air brought in from the outside to a plurality of flow control units (220). Thereafter, the flow control unit (220) transmits the distributed air to the downstream at an appropriate flow rate.

[0088] The flow control unit (220) can measure the total volume of air entering the test chamber (110) to calculate the amount of carbon dioxide generated (mg). In addition, the flow control unit (220) can control the flow rate of air so that the concentration of carbon dioxide generated within the test chamber (110) falls within the measurement range of the carbon dioxide sensor (330) described below. When the amount of carbon dioxide generated within the test chamber (110) is constant, if the flow rate of air increases, the total volume increases, diluting the carbon dioxide and reducing the concentration.

[0089] In addition, the flow control unit (220) can control the moisture content of the inoculum (compost, etc.) within the test chamber (110). Since the air supplied from the outside is relatively dry, if the flow rate of air flowing in increases, the moisture content within the test chamber (110) can decrease.

[0090] The flow control unit (220) may include a flow supply unit (221) and a flow diverter (222). The flow supply unit (221) is provided downstream of the distribution unit (210) and can transfer the flow rate delivered from the distribution unit (210) to any one of the test chambers (110).

[0091] The flow supply device (221) may be assigned 1:1 to each test chamber (110). Therefore, for example, if 12 test chambers (110) are provided, 12 flow supply devices (221) may be provided. However, in case the specifications of the test chambers (110) are not all the same, multiple flow supply devices (221) may also have different specifications. The fluid flow when air flows by the flow supply device (221) is as shown in Fig. 5.

[0092] The flow diverter (222) is provided downstream of the distribution unit (210) and diverts the flow rate delivered from the distribution unit (210) to the flow selection unit (230) or the inspection unit (300) by bypassing the chamber unit (100). The flow diverter (222) can be used when cleaning of the inspection unit (300) or the like needs to be performed, rather than when external air is supplied to the test chamber (110).

[0093] The flow of air through the flow bypass (222) is as shown in Fig. 4. During cleaning, the flow may be delivered in the following order: through the distribution unit (210), the flow bypass (222), the flow selection unit (230), and the inspection unit (300). Alternatively, during cleaning, the flow may be delivered in the following order: through the distribution unit (210), the flow bypass (222), and the inspection unit (300). That is, the flow bypass (222) is for cleaning the gas discharged from the test chamber (110), and can supply outside air to the section where the gas flows. Through this, the present embodiment can implement initialization of the inspection unit (300), etc.

[0094] Specifically, the flow bypass (222) can clear the flow selection unit (230) and the test unit (300) using external air when the biodegradation test is stopped or terminated. Alternatively, the flow bypass (222) can clear the test unit (300) using external air even when the test chamber (110) that is the subject of the biodegradation test is changed. This prevents the gas discharged from the test chamber (110) from remaining upstream or downstream of the test unit (300), thereby reducing contamination and aging of the sensors and pipes of the test unit (300), thereby ensuring the accuracy and reliability of the test results.

[0095] The flow selector (230) transfers at least a portion of the gas discharged from the chamber unit (100) to the test unit (300). The flow selector (230) can transfer the gas discharged from the test chamber (110) where the test is performed to the test unit (300). In other words, the flow selector (230) may be configured to connect the test chamber (110) where the biodegradation test is performed to the test unit (300).

[0096] The fluid selection unit (230) may be provided in a form opposite to that of the distribution unit (210). The distribution unit (210) transfers external air introduced from one inlet port to multiple exhaust ports, and the fluid selection unit (230) may transfer gas introduced from multiple inlet ports to one exhaust port.

[0097] The droplet separation unit (240) separates droplets from the gas discharged from the chamber unit (100). Aerobic biodegradation occurs within the test chamber (110) included in the chamber unit (100), and the gas generated during this process may contain some moisture.

[0098] Since moisture can affect the carbon dioxide measurement value, which is the result of a biodegradation test, it is desirable to prevent it from entering the test unit (300). Therefore, the present embodiment can separate moisture from the gas discharged from the chamber unit (100) upstream of the test unit (300). For reference, in this specification, the term "droplet" may refer to moisture, etc., but may also encompass any substance that has a liquid phase and unnecessarily affects the carbon dioxide measurement.

[0099] The droplet separation unit (240) can separate droplets contained in a gas at at least two points. Specifically, the droplet separation unit (240) can separate droplets upstream of the flow selection unit (230) and can also separate droplets upstream of the inspection unit (300).

[0100] The droplet separation unit (240) may include a first filter (241) and a first pump (242) provided between the chamber unit (100) and the flow selection unit (230). The first filter (241) is provided between the chamber unit (100) and the flow selection unit (230) and collects droplets from the gas discharged from the test chamber (110). At this time, the first filter (241) may separate the droplets by cooling the gas. Cooling methods such as air cooling, cooling using a refrigerant, and cooling using a Peltier element may be used.

[0101] The first pump (242) pumps the droplets separated from the first filter (241). The first pump (242) can transfer the droplets separated from the first filter (241) between the flow control unit (220) and the chamber unit (100). Through this, the droplet separation unit (240) can prevent the droplets separated from the upstream of the flow selection unit (230) from flowing into the chamber unit (100), thereby preventing the droplets from flowing into the inspection unit (300).

[0102] In addition, the droplet separation unit (240) may include a second filter (243) and a second pump (244) provided between the fluid selection unit (230) and the inspection unit (300). The second filter (243) is provided between the fluid selection unit (230) and the inspection unit (300) and collects droplets from the gas transmitted from the fluid selection unit (230) to the inspection unit (300). At this time, the second filter (243) may separate droplets by cooling the gas using air cooling, refrigerant cooling, Peltier element cooling, etc., as described in the first filter (241).

[0103] The second pump (244) pumps the droplets separated from the second filter (243). The second pump (244) can discharge the droplets separated from the second filter (243) to the outside. Through this, the droplet separation unit (240) can separate the droplets that may be contained in the gas flowing downstream of the flow selection unit (230) and then transfer them to the inspection unit (300), thereby ensuring inspection accuracy.

[0104] The control unit (250) controls the distribution unit (210), the flow control unit (220), and the flow selection unit (230) and has an independent power supply. The control unit (250) is an MCU (Micro Controller Unit) and may be provided as an integral part of the distribution unit (210), etc.

[0105] The distribution unit (210) and the flow control unit (220) of the present embodiment can be controlled by an externally connected control device (600) (System PC). However, since the biodegradation test lasts from one to six months, the environment inside the chamber unit (100) must be maintained at a constant level during the test period. Accordingly, the external control device (600) must also maintain continuous operation and control connection for approximately six months.

[0106] However, unexpected factors may cause problems in the operation or signal transmission of the control device (600), and in such cases, malfunctions in the distribution unit (210) and the flow control unit (220) may occur. In particular, in a test period of 6 months, if the above-mentioned problem occurs during the test period of 3 months or longer, there is a problem that the test is significantly delayed.

[0107] In order to resolve the burden of having to maintain the operation of the control device (600) when relying on an external control device (600) and the risk of the test itself being abandoned when a problem occurs in the control device (600), the control unit (250) can be provided separately internally.

[0108] This control unit (250) can be connected to an external control device (600). The control unit (250) can receive test conditions of the chamber unit (100) from the control device (600), and can control the flow rate control unit (220), etc., so that the test conditions are maintained when the connection with the control device (600) is disconnected.

[0109] The control unit (250) ensures that the distribution unit (210) and the flow control unit (220), etc., operate appropriately from the time the test is initiated until the test is terminated, even if the control device (600) is disconnected. That is, the control unit (250) can control the flow control unit (220), etc., so that the test conditions of the chamber unit (100) are maintained regardless of whether it is connected to the control device (600) during the period from the start to the end of the biodegradation test.

[0110] In particular, the control unit (250) may be equipped with an independent power source to prepare for cases where the power supply from the control device (600) is cut off. The independent power source may be a battery, etc., and power may be transmitted from the control unit (600) to the flow control unit (220), etc., and the control unit (250) may implement a backup when necessary. Conversely, in the case of power, the control unit (250) and the control device (600) may be arranged to be able to back up each other.

[0111] That is, in this embodiment, operations and information transmission, etc. can be performed by an external control device (600) or an internal control unit (250). In particular, even if the control device (600) stops operating due to an update or other reason, the control unit (250) can maintain the open-pass biodegradation test conditions at a constant level. Therefore, this embodiment can prevent unnecessary mid-test abandonment.

[0112] In addition, the control unit (250) can independently clean the sensor included in the inspection unit (300) by introducing external air into the inspection unit (300) when the test is stopped or terminated in the control device (600), thereby protecting the sensor.

[0113] Furthermore, the control unit (250) can temporarily store data measured by the inspection unit (300) during the test process when communication with the control device (600) is cut off. For this purpose, the control unit (250) can include a memory. The control unit (250) can maintain the functions of the chamber unit (100) and the inspection unit (300) for more than one hour through an auxiliary battery, etc., and can store data during the period when communication with the external control device (600) is cut off and then transmit the data to the control device (600) when communication is restored. At this time, the control device (600) can secure the continuity of the inspection results by synchronizing the data received from the control unit (250) and the data previously received.

[0114] However, it should be noted that in this specification, each component being controlled by the control unit (250) may be replaced by being controlled by the control device (600), except in the case of backing up an external control device (600).

[0115]

[0116] The inspection unit (300) inspects the gas discharged from the chamber unit (100). The inspection unit (300) can check the amount of carbon dioxide in the gas discharged from the chamber unit (100), and thereby determine the degree of biodegradation, etc.

[0117] Data measured by the inspection unit (300) can be transmitted to an external control device (600) via wired or wireless communication. Of course, as previously described, the measurement data of the inspection unit (300) can be transmitted to the control unit (250) and temporarily stored by the control unit (250) depending on the situation. The data temporarily stored by the control unit (250) can be synchronized by the control device (600) at a later date to secure continuous data.

[0118] The inspection unit (300) can inspect gas flowing in through the fluid selection unit (230). The fluid selection unit (230) can transmit gas transmitted from a test chamber (110) subject to a biodegradation test among a plurality of test chambers (110) to the inspection unit (300), so the inspection unit (300) performs an inspection on any one of the test chambers (110).

[0119] Gas passing through the inspection unit (300) can be discharged to the outside through the vent section (360). The vent section (360) is configured to discharge gas delivered from the test chamber (110) and tested in the inspection unit (300), and can prevent the discharged gas from being delivered to the distribution section (210) again.

[0120] For example, the vent section (360) may discharge gas from a location opposite to where air flows into the distribution section (210). Of course, even if at least some of the gas discharged from the vent section (360) flows into the distribution section (210), it may not affect the test since an air filter is provided as described above.

[0121] Referring to FIG. 6, the inspection unit (300) may include a status sensor (310), an oxygen sensor (320), a carbon dioxide sensor (330), etc. The status sensor (310) may sense the temperature, pressure, and humidity of the gas transmitted from the flow selection unit (230).

[0122] Temperature (℃) and pressure (mbar) can be used to detect carbon dioxide based on the ideal gas equation, and humidity (relative humidity %) can be used for volume correction. In addition, the status sensor (310) can measure all variables (such as flow rate (ml / min)) necessary for measuring carbon dioxide and evaluating biodegradation tests.

[0123] The oxygen sensor (320) detects oxygen in the gas transmitted from the flow selection unit (230). The oxygen sensor (320) can detect the oxygen concentration (%) in the gas discharged from the test chamber (110) during a biodegradation test.

[0124] The carbon dioxide sensor (330) detects carbon dioxide in the gas transmitted from the fluid selection unit (230). This carbon dioxide sensor (330) may be a sensor that measures carbon dioxide in ppm units.

[0125] In particular, in the present embodiment, the carbon dioxide sensor (330) is provided as a double CO2 sensor including a high-concentration carbon dioxide sensor (330a) and a low-concentration carbon dioxide sensor (330b).

[0126] Carbon dioxide generated as biodegradation progresses within the test chamber (110) moves to the carbon dioxide sensor (330) (Non-dispersive Infrared, NDIR sensor) together with the air introduced into the test chamber (110), and the concentration of carbon dioxide is measured. At this time, since the amount of air flowing into the test chamber (110) can be controlled by the flow control unit (220), even if the amount of carbon dioxide generated within the test chamber (110) is constant, the concentration of carbon dioxide may vary depending on the amount of air flowing (CO2 concentration (ppm) = amount of CO2 generated / amount of air). Therefore, as the flow rate of the flow control unit (220) increases, the amount of air increases, and the concentration of carbon dioxide may decrease.

[0127] The maximum flow rate (Full Range) of the flow control unit (220) and the maximum measured concentration (Full Range) of the carbon dioxide sensor (330) are fixed. At this time, the error rate of the flow control unit (220) may be approximately 1% of the full range, and the error rate (accuracy: the difference between the actual value and the measured value expressed as a percentage) of the carbon dioxide sensor (330) may be approximately 2% of the full range. In other words, the higher the maximum concentration of the carbon dioxide sensor (330), the lower the reliability of the data when measuring low-concentration carbon dioxide.

[0128] Biodegradation testing involves measuring and analyzing CO2 generated from an inoculum (blank), a standard substance, and a target substance. The concentration of carbon dioxide generated from the inoculum, standard substance, and target substance can vary depending on the decomposition rate. Generally, the amount of carbon dioxide generated is higher in the order of standard substance > target substance > inoculum, and the amount of carbon dioxide generated generally varies over time.

[0129] In a biodegradation test, the concentration of carbon dioxide is generally high initially and gradually decreases. In such a situation, if a carbon dioxide sensor (330) is used alone, it is impossible to precisely measure various concentration values ​​at once.

[0130] In order to create an environment identical to that of the inoculum, the flow rate of the flow rate control unit (220) for the test chamber (110) containing the target material must be determined identically to that of the inoculum, and the flow rate must be controlled based on the material that generates the most carbon dioxide. In addition, the flow rate of air by the flow rate control unit (220) is increased equally throughout so as not to exceed the maximum measured concentration of the carbon dioxide sensor (330).

[0131] In this case, the concentration of the substance with low carbon dioxide emissions is bound to be measured lower, and furthermore, the difference in carbon dioxide emissions from the inoculum source may be less than 100 ppm. This difference falls within the error ratio range of the carbon dioxide sensor (330), which may ultimately lead to errors in carbon dioxide measurement.

[0132] On the other hand, in order to solve the problem that the reliability of data decreases when measuring low-concentration carbon dioxide as the maximum measurement concentration of the carbon dioxide sensor (330) increases, the present embodiment can use a high-concentration carbon dioxide sensor (330a) and a low-concentration carbon dioxide sensor (330b) in parallel.

[0133] Even if the hardware limitation of the carbon dioxide sensor (330) of 2% error rate is not improved, by applying the carbon dioxide sensor (330) to two different concentration ranges, the measurement error at low concentrations can be reduced, thereby improving the reliability of data.

[0134] In addition, this embodiment can overcome the limitation that only one carbon dioxide sensor (330) cannot precisely measure all values ​​of various concentrations. That is, since this embodiment can apply the measurement value with a carbon dioxide sensor (330) having a high error rate based on the concentration generated in the test chamber (110), the precision can be further increased by combining the maximum measurement range values ​​of the carbon dioxide sensor (330) in various ways.

[0135] Specifically, in this embodiment, when the high-concentration carbon dioxide sensor (330a) has an error range of ±200 ppm based on 10,000 ppm, even if the data obtained through the high-concentration carbon dioxide sensor (330a) is not reliable for a section where the difference in carbon dioxide between the inoculum and the material is within 200 ppm, reliable results can be obtained for a difference of 20 ppm or more by utilizing the low-concentration carbon dioxide sensor (330b) (error range of ±20 ppm based on 1000 ppm).

[0136] That is, the carbon dioxide sensor (330) includes a high-concentration carbon dioxide sensor (330a) having a detection range of relatively high concentration and a preset error rate, and a low-concentration carbon dioxide sensor (330b) having a detection range of relatively low concentration and a preset error rate.

[0137] At this time, the flow control unit (220) can control the flow rate of air so that the carbon dioxide contained in the gas discharged from the chamber unit (100) does not go beyond the detection range of the high-concentration carbon dioxide sensor (330a).

[0138] Furthermore, in order to minimize the decrease in the moisture content of the inoculum in the test chamber (110), the concentration of carbon dioxide generated is monitored, and the flow rate control unit (220) can automatically reduce or increase the flow rate without stopping the test within the detection range of the carbon dioxide sensor (330). In this regard, the detection range of the carbon dioxide sensor (330) and the control range of the flow rate control unit (220) are as shown in Tables 1 and 2 below.

[0139] CO2Limit range(%)DatapointsUpperLowerMin70303Max1005010default80403

[0140] MFCLimit range(%)VariationvalueUpperLowerMin80105Max1003020default1001010

[0141]

[0142] In addition, the carbon dioxide sensor (330) can be inspected using a low-concentration carbon dioxide sensor (330b) for a section where the difference in carbon dioxide between the inoculum (Blank) and the target material is less than the error rate of the high-concentration carbon dioxide sensor (330a).

[0143] The test unit (300) can calculate test results (biodegradability, etc.) using a preset mathematical formula. This embodiment may be a case of implementing an open-pass method test. For reference, the open-pass method is a method in which a carrier gas is introduced from the outside, passes through the test chamber (110) and the test unit (300), and is vented. However, the open-pass method does not necessarily mean only aerobic conditions. Depending on the carrier gas, the open-pass method can be applied to both aerobic (aerobic) and anaerobic (oxygen-free) conditions.

[0144] For example, when an anaerobic test is performed using an open-pass method, the gas emitted from the test chamber (110) may contain methane. Therefore, the test unit (300) can measure methane along with carbon dioxide to produce biodegradation test results. However, the sensor for measuring methane will be described in more detail in another embodiment below.

[0145] Additionally, when the present embodiment applies an aerobic biodegradation test using an open-pass method, methane may not be generated or a methane sensor (340) may not be present. In this case, the methane-related variable in the preset mathematical formula is set to 0, and the test results can be accurately calculated simply by measuring carbon dioxide.

[0146] For reference, the mathematical formula set forth in the present invention may be a formula for calculating the total organic carbon amount by measuring and calculating the organic carbon amount for the first to Nth gases that contain carbon and are measurable, and then dividing this by the theoretical total organic carbon amount to calculate the biodegradability. For example, the first gas may be carbon dioxide, the second gas may be methane, and carbon monoxide or the like may be added as a third gas.

[0147] The inspection unit (300) can measure temperature, humidity, pressure, oxygen, carbon dioxide, etc., and as mentioned above, can also measure methane, etc. In addition, the inspection unit (300) can expand the measurement target by providing an expansion unit (350) and adding a sensor to the expansion unit (350). For example, an H2S sensor, a VOC sensor, etc. can be additionally equipped to the expansion unit (350).

[0148] For example, the inspection unit (300) can basically utilize sensors that sense flow rate, pressure, temperature, humidity, and gases (oxygen, carbon dioxide). In addition, the inspection unit (300) can additionally utilize other types of gas sensors regardless of whether it is an open-pass or closed-circuit type. In addition, at least some of the sensors provided in the inspection unit (300) can be provided as the high-concentration / low-concentration double sensors described above.

[0149] The present embodiment may further include a display (400). As described above, the chamber unit (100) is provided with a display (400), and the display (400) can output the temperature of the test chamber (110), etc.

[0150] A display (400) may be provided in each of the chamber unit (100) and the processing unit (200), and may display the current operating status of each component and the status of any problems occurring in real time. In addition, the display (400) is provided as an LCD touch panel, so that data can be conveniently selected and confirmed.

[0151] In the case of Fig. 7, the operating status of the device is displayed by the display (400). The display (400) displays the flow between the test chamber (110) and the flow sensor in the flow control unit on the left, thereby enabling confirmation of normal operation of the flow control unit (220). In addition, the display (400) can display the current test conditions of the chamber unit (100) and the number of log records for each of the 12 test chambers (110).

[0152] In the case of Fig. 8, an error log is displayed by the display (400). The display (400) can indicate whether there is a connection problem in the inspection unit (300), and can record and display flow-related alarms, etc. for each test chamber (110).

[0153] In addition, this embodiment can use an LED warning light, etc. to guide the tester to easily and quickly understand the current status of the device and take appropriate action. At this time, the LED warning light can be provided on the display (400), or can be provided on the edge of a case (not shown) that accommodates the display (400) or the chamber unit (100).

[0154]

[0155] This embodiment may further include a computation unit. The computation unit may process data measured by the inspection unit (300) and provide it to the user. In this case, the computation unit may be the control device (600) described above, or the control unit (250). Alternatively, the computation unit may include both the control device (600) and the control unit (250).

[0156] The computation unit can implement a software merge function to compare and analyze two or more data files. Specifically, the computation unit can compare and analyze past and current data in a single graph, allowing for monitoring of test progress.

[0157] Specifically, the operation unit receives first data of a test conducted on N1 test chambers (110) during a first period and second data of a test conducted on N2 test chambers (110) during a second period different from the first period, and merges the first data and the second data.

[0158] Through this, the operation unit can produce merge data of tests conducted on N1+N2 test chambers (110) during a reference period and provide it to the user as a single graph.

[0159] Additionally, the computation unit can adjust the grouping of the databases, taking into account that the test end times may differ when the databases are grouped for multiple test chambers (110). This will be described with reference to Fig. 11.

[0160] Referring to Fig. 11, the present embodiment may include at least four test chambers (110). In this case, a plurality of test chambers (110) may constitute one chamber unit (100) or may belong to a plurality of chamber units (100). For reference, in Fig. 11, a test chamber (110) marked with an “X” is one in which testing has been completed, and a test chamber (110) without an “X” is one in which testing is in progress.

[0161] A plurality of test chambers (110) may be divided into a plurality of groups. For example, test chambers (110) from 1 to N may be divided into a first group (110a), and test chambers (110) from N+1 to N+M may be divided into a second group (110b). In this case, the first and second groups (110a, 110b) may each be assigned to separate databases. That is, data corresponding to the first group (110a) may be managed in the first database, and data corresponding to the second group (110b) may be managed in the second database.

[0162] The first group (110a) and the second group (110b) may each include two or more test chambers (110), and the test periods for each test chamber (110) may not be the same. In this case, some of the test chambers (110) in the first group (110a) may be undergoing testing while the remaining test chambers (110) may have completed testing, and the correspondence between the first group (110a) and the first database needs to be maintained until the testing of all test chambers (110) is completed. This is because data is continuously added to the first database.

[0163] However, since the biodegradation test takes a relatively long time, if only some of the test chambers (110) within the first group (110a) have completed the test, the test chambers (110) that have completed the test have no choice but to be left unattended while the remaining test chambers (110) are being tested.

[0164] Therefore, in order to reduce the period of time in which a test chamber (110) is left without starting a test after the test has been completed, the present embodiment can adjust the grouping between the test chamber (110) and the database.

[0165] Specifically, when the test is completed for at least one test chamber (110), the operation unit divides the test chamber (110) in which the test is in progress among the test chambers (110) of the first group (110a) and the test chamber (110) in which the test is in progress among the test chambers (110) of the second group (110b) into a new first group (110a'). In addition, the operation unit divides the test chamber (110) in which the test is completed among the test chambers (110) of the first group (110a) and the test chamber (110) in which the test is completed among the test chambers (110) of the second group (110b) into a new second group (110b').

[0166] In this case, the new first and second groups (110a', 110b') may be assigned to separate databases. For example, the new first group (110a') may be managed in the first database, and the new second group (110b') may be managed in the second database. At this time, data from some test chambers (110) where testing is in progress may be moved and synchronized.

[0167] That is, the operation unit groups the test chamber (110) anew according to whether the test is completed in the first and second groups (110a, 110b) and divides it into the first and second groups (110a', 110b'), and assigns a separate database to each group.

[0168] In this case, for the second group (110b') that includes only test chambers (110) for which testing has been completed, no changes / additions to the database are made because the collection of test result data has been completed. Therefore, the present embodiment can enable a new biodegradation test to be initiated immediately for the test chamber (110) corresponding to the second group (110b'). On the other hand, the test of the test chamber (110) corresponding to the first group (110a') can continue without issue.

[0169] Through this, the present embodiment, taking into account the characteristics of a biodegradation test that must be conducted over a long period of time, can minimize the period during which the test chamber (110) is left without conducting a test by adjusting the matching between the test chamber (110) and the database when the biodegradation test is completed for some of the multiple test chambers (110).

[0170]

[0171] Figures 12 to 15 are block diagrams of a biodegradation test device according to a second embodiment of the present invention. For reference, Figures 13 to 15 are drawings in which the flow of fluid is indicated with a bold line compared to Figure 12.

[0172] Below, the differences between this embodiment and the previous embodiment will be explained, and any omitted parts will be replaced with the above content.

[0173] Referring to FIGS. 12 to 15, the biodegradation test device (1) according to the second embodiment of the present invention can implement not only an open-through type biodegradation test but also a closed circuit type biodegradation test. To this end, the present embodiment further includes a test change unit (500).

[0174] In the closed circulation method, the main reaction proceeds within a closed test chamber (110) that does not circulate. However, only when measuring gas concentration, etc., is the gas circulated from the test chamber (110) to the inspection unit (300) for measurement.

[0175] In addition, when the test subject is switched to the next test chamber (110), the existing test chamber (110) is switched to a closed state by blocking the gas selection unit (514) described later, and the internal gas of the inspection unit (300), gas selection unit (514), flow selection unit (230), etc. is cleared with carrier gas, and the gas concentration can be measured as the gas of the next test chamber (110) is introduced and circulated.

[0176] In this closed circulation method, volume and pressure, etc. can be measured mainly for a test chamber (110) of an individually sealed type, and at this time, biogas containing carbon dioxide and methane, etc. can be the gas to be measured.

[0177] On the other hand, an aerobic test using a carbon dioxide absorbent is possible in a closed-circuit method using an individually sealed test chamber (110). For example, when carbon dioxide generated within the test chamber (110) is absorbed by the carbon dioxide absorbent, a vacuum is generated corresponding to the amount absorbed, which allows oxygen to be supplied as electrolysis progresses. The supply of oxygen is stopped when the internal pressure of the test chamber (110) becomes atmospheric pressure. In this case, the amount of oxygen consumed can be estimated from the amount of oxygen supplied by electrolysis to calculate the biodegradability, or the carbon dioxide absorbent can be titrated and analyzed.

[0178] That is, in this specification, the open-pass method and the closed-circuit method do not necessarily correspond to the aerobic test and the anaerobic test, and the test performed in the present invention may vary depending on the test method and the test chamber (110), etc.

[0179] For reference, Fig. 13 illustrates an example of implementing an open-pass test, and Fig. 14 illustrates an example of implementing a closed-circuit test. In the case of the open-pass test, an external fluid gas is continuously supplied to the chamber unit (100), and thus, both an aerobic test and an anaerobic test are possible depending on whether the fluid gas contains oxygen.

[0180] However, since supplying oxygen-free gas (such as nitrogen) in an open-pass method is somewhat uneconomical, the preceding example can be understood as a case in which an aerobic biodegradation test is conducted. However, the present invention can of course further include an example in which the external air in the preceding example is replaced with nitrogen, etc., to implement an anaerobic test.

[0181] That is, in this specification, the open-pass method does not necessarily mean aerobic conditions, and it is noted that the closed-circuit method may mean anaerobic conditions unless there are special cases.

[0182] The test change unit (500) changes the test conditions of the chamber unit (100). The test change unit (500) can apply open-pass test conditions by allowing external air to be delivered to the chamber unit (100) through the distribution unit (210) and the flow control unit (220).

[0183] The flow in the open-pass test is as shown in Fig. 13. External air is delivered to the test chamber (110) through the distribution unit (210) and the flow control unit (220), and the gas discharged from the test chamber (110) is delivered to the inspection unit (300) through the flow selection unit (230). The gas that has completed the test in the inspection unit (300) is discharged to the outside through the vent unit (360).

[0184] On the other hand, the test change unit (500) can apply closed-circuit test conditions by recirculating the gas discharged from the inspection unit (300) to the chamber unit (100). For this purpose, the test change unit (500) can include a gas circulation unit (510).

[0185] The gas circulation unit (510) is connected between the flow control unit (220) and the chamber unit (100) downstream of the inspection unit (300). That is, the gas circulation unit (510) can transfer the gas that has passed through the inspection unit (300) and is not yet transferred to the vent unit (360) to the upstream of the chamber unit (100). Through this, the gas circulates along a closed loop, and since no additional external air is introduced, conditions for a closed circulation test can be met.

[0186] In particular, the gas circulation unit (510) may be connected downstream from the point where the droplets are introduced by the droplet separation unit (240) downstream of the flow control unit (220). This is to ensure that the gas is smoothly returned to the test chamber (110) when the inflow of external air is blocked.

[0187] The test change unit (500) can apply open-pass test conditions or closed-circuit test conditions by adjusting the first valve (511) provided downstream of the flow control unit (220) and the second valve (512) provided downstream of the inspection unit (300). At this time, the first valve (511) can be provided at a point where droplets are introduced by the droplet separation unit (240), and the second valve (512) can be provided at a point where the gas circulation unit (510) branches.

[0188] For example, referring to FIG. 13, the test change unit (500) adjusts the first valve (511) between the flow control unit (220) and the test chamber (110) to apply open-pass test conditions so that outside air is transferred from the flow control unit (220) to the test chamber (110), and adjusts the second valve (512) between the inspection unit (300) and the vent unit (360) so that gas passing through the inspection unit (300) is discharged to the outside.

[0189] On the other hand, referring to FIG. 14, the test change unit (500) applies closed-circuit test conditions by controlling the first valve (511) between the flow control unit (220) and the test chamber (110) so that the droplets transferred from the droplet separation unit (240) are transferred to the test chamber (110), but outside air is not allowed to flow into the test chamber (110). In addition, the test change unit (500) can control the second valve (512) between the test unit (300) and the vent unit (360) so that the gas passing through the test unit (300) is not released to the outside but is recirculated to the test chamber (110).

[0190] However, in this case, since the gas may not flow but stagnate between the test chamber (110) and the inspection unit (300), the test change unit (500) may use a gas circulation pump (513) to implement a circulating flow of gas. The gas circulation pump (513) may be provided on the gas circulation unit (510) and may be placed between the first valve (511) and the second valve (512).

[0191] In addition, when a closed-circuit biodegradation test is conducted for two or more test chambers (110), the test change unit (500) may further include a gas selection unit (514) that selects the flow of gas in order to return the gas discharged from one of the test chambers (110) and passed through the inspection unit (300) to the corresponding test chamber (110).

[0192] The gas selection unit (514) can replace the contents described in the flow selection unit (230) with a configuration that can achieve a function similar to that of the flow selection unit (230). For example, the gas selection unit (514) can select the flow of gas to return the gas discharged from the first test chamber (110) to the first test chamber (110) and to return the gas discharged from the second test chamber (110) to the second test chamber (110). That is, the gas selection unit (514) transfers the gas introduced into the inspection unit (300) to a test chamber (110) that is the source of the gas among the plurality of test chambers (110), thereby implementing a clear closed circulation for the plurality of test chambers (110).

[0193] The control unit (250) of the present embodiment can clear the inspection unit (300) when the test chamber (110) is changed under the closed-circuit test conditions. Clearing is described with reference to FIG. 15.

[0194] Conventional anaerobic test devices do not require separate clearing because a sensor is provided in each test chamber (110). However, in the present embodiment, while implementing a closed-circuit test, multiple test chambers (110) share the test unit (300), so clearing for the test unit (300) is required.

[0195] Accordingly, when the test chamber (110) that is the subject of the biodegradation test is changed under a closed-circuit test, the control unit (250) can clear the flow selection unit (230) and the inspection unit (300) through external air. At this time, the flow diverter (222) described above can be used.

[0196] Referring to FIG. 15, the present embodiment can clear the gas remaining in the inspection unit (300) and the like when the test chamber (110) is changed without returning it to the corresponding test chamber (110). That is, the external air passes through the distribution unit (210), the flow bypass unit (222), the flow selection unit (230), and the inspection unit (300) and is then discharged to the vent unit (360).

[0197] In addition, the present embodiment can also apply clearing to the upstream portion of the gas selection unit (514). For this purpose, a third valve (515) can be provided downstream of the flow selection unit (230). External air passing through the flow selection unit (230) is delivered to the gas selection unit (514) through the third valve (515), and can be delivered to the vent unit (360) while flowing backwards upstream of the gas selection unit (514). In other words, external air can clear at least a portion of the gas selection unit (514) and the gas circulation unit (510) downstream of the flow selection unit (230).

[0198] However, in order to prevent gas from flowing back from the gas selection unit (514) to the fluid selection unit (230) under conditions of non-clearing, a check valve (not shown) may be provided downstream of the third valve (515). Of course, the check valve may be freely applied to a portion of the present invention where backflow of fluid is not desirable.

[0199] Through this, the present embodiment can sufficiently clear the parts commonly used for a plurality of test chambers (110) (the lower part of the fluid selection unit (230), which is a common line of fluid, between the inspection unit (300) and the gas selection unit (514), and the inspection unit (300)).

[0200] However, if the present embodiment performs clearing according to a change in the test chamber (110), the carbon dioxide measurement value by the inspection unit (300) may appear in a step form. This is because some of the carbon dioxide, which is the target of measurement, may be lost due to clearing.

[0201] However, the inspection unit (300) of the present embodiment can perform an appropriate calculation on the difference in carbon dioxide measurement values ​​that appears due to clearing, convert it into a continuous graph, and output it.

[0202] Additionally, the inspection unit (300) of the present embodiment may further include a methane sensor (340) in addition to the carbon dioxide sensor (330). In a closed-loop test, methane is generated, and methane (CH4), like carbon dioxide, contains carbon. Therefore, the present embodiment can measure and sum both carbon dioxide and methane, convert the result into carbon emissions, and output the result.

[0203] The inspection unit (300) can calculate the biodegradability according to the mathematical formula described above by utilizing the values ​​detected by the carbon dioxide sensor (330) and the methane sensor (340) when the closed-circuit test conditions are applied.

[0204] In order to resolve the issue that the biodegradability formula using only the amount of carbon dioxide generated cannot produce clear test results when the carbon of the target material is converted to carbon dioxide or methane, this example added a methane sensor (340) and applied the new formula described above. Through this, this example can more accurately output biodegradability under closed-loop testing conditions.

[0205] Additionally, the methane sensor (340) may be configured as a double CH4 methane sensor including a high-concentration methane sensor (340a) and a low-concentration methane sensor (340b). This replaces the description provided above regarding the carbon dioxide sensor (330).

[0206]

[0207] Fig. 16 is a perspective view of an air filter unit (700) of a biodegradation test device according to a third embodiment of the present invention, Fig. 17 is a front view of an air filter unit (700) of a biodegradation test device according to a third embodiment of the present invention, and Fig. 18 is a rear view of an air filter unit (700) of a biodegradation test device according to a third embodiment of the present invention. In addition, Fig. 19 is a conceptual diagram of an air filter unit (700) of a biodegradation test device according to a third embodiment of the present invention.

[0208] This embodiment may further include an air filter unit (700) compared to the first or second embodiment described above. Hereinafter, the air filter unit (700) of this embodiment will be described in detail, but the remaining components will be replaced with the previous description.

[0209] The air filter unit (700) removes carbon dioxide from the outside air flowing into the treatment unit (200). The outside air passes through the treatment unit (200) and flows into the chamber unit (100). If a large amount of carbon dioxide is present in the outside air, it may interfere with the measurement in the inspection unit (300). Therefore, the present embodiment can reduce the carbon dioxide concentration in the outside air flowing into the treatment unit (200) by providing the air filter unit (700).

[0210] The air filter unit (700) includes a scrubber (710) and a frame (720). The scrubber (710) is configured to remove carbon dioxide as outside air passes through it, and may be filled with a carbon dioxide absorbing material capable of absorbing carbon dioxide. For example, the carbon dioxide absorbing material may be soda lime, but is not limited thereto.

[0211] The scrubber (710) may be provided in two or more units. That is, as shown in the drawing, the scrubber (710) may be provided in at least one pair, and may be provided in parallel to achieve sufficient carbon dioxide absorption.

[0212] The scrubber (710) includes a circular column-shaped receiving portion (711) for receiving soda lime or the like, as illustrated in FIG. 19. At this time, the receiving portion (711) may be open at both ends, and an inlet portion (712) is closed on one side of the receiving portion (711), and an outlet portion (713) is closed on the other side.

[0213]

[0214] *The inlet (712) may form a portion where outside air enters the scrubber (710). The inlet (712) may be connected to an inlet line (721) to be described later. The inlet (712) may be connected to the receiving portion (711) using a screw, a forced fit, or the like. In addition, the inlet (712) may have a sealing member (not shown) such as an O-ring applied to the inner surface to seal the receiving portion (711).

[0215] The discharge portion (713) forms a portion from which outside air is discharged from the scrubber (710). The discharge portion (713) can be connected to a discharge line (723) to be described later, and, like the inlet portion (712), can be connected to the receiving portion (711) using a screw or the like. In addition, the receiving portion (711) is sealed using a sealing member or the like.

[0216] A filter unit (714) may be provided in the inlet (712) and the outlet (713). The inlet (712) and the outlet (713) have a radially penetrating catch hole, etc., in the inner portion facing the receiving portion (711) compared to the end where the inlet line (721) or the outlet line (723) is connected, and the filter unit (714) may be built into the outer portion of the catch hole. That is, the filter unit (714) may be provided between the inlet line (721) and the carbon dioxide absorbent material, and between the carbon dioxide absorbent material and the outlet line (723).

[0217] The filter unit (714) can be provided with a microfiber filter, etc., and can prevent powder generated from an absorbent material such as soda lime from being released to the outside of the scrubber (710).

[0218] The frame (720) supports the scrubber (710). The frame (720) may be configured to allow the air filter unit (700) to be placed around the case described above. In addition, the frame (720) may further include a stand (not shown) to support the scrubber (710). A plurality of stands may be assigned to each scrubber (710), and the stands may be spaced apart from each other in the height direction of the scrubber (710). The stands may have a shape corresponding to the cross-sectional shape of the scrubber (710) so as to come into contact with the outer surface of the scrubber (710). For example, the stands have a U-shape, and both ends are provided to be deformable by an external force. The stand can be deformed so that both ends spread apart when the scrubber (710) is combined, and can be provided to hold the cylindrical scrubber (710) to prevent the scrubber (710) from coming off.

[0219] The air filter unit (700) is provided with an inlet line (721), an exhaust line (723), and a conversion line (724). The inlet line (721) transfers outside air to the scrubber (710). One side of the inlet line (721) may be fixed on a frame (720), and an auxiliary filter (722) may be provided on the inlet line (721). The auxiliary filter (722) is used to remove dust or other particulate matter, and may be provided as a microfiber filter. Since the auxiliary filter (722) can implement the same function as the filter unit (714) described above, a detailed description thereof will be omitted.

[0220] An inlet line (721) extends from one end fixed to a frame (720) and can be connected to an inlet portion (712) provided on a pair of scrubbers (710). The inlet line (721) is provided to be divided into a Y shape to distribute external air to a plurality of scrubbers (710) and can be provided with a distribution valve (7211). The distribution valve (7211) can divide the external air introduced into the inlet line (721) toward each scrubber (710).

[0221] The discharge line (723) is configured opposite to the inlet line (721), extends from one end fixed to the frame (720), and is connected to an outlet (713) provided on a pair of scrubbers (710). The discharge line (723) delivers outside air passing through the scrubbers (710) to the treatment unit (200). In order to integrate the outside air discharged from the pair of scrubbers (710) and deliver it to the treatment unit (200), it is configured in a Y shape and may be provided with a merging valve (7231). The merging valve (7231) integrates the outside air introduced into the discharge line (723) from each scrubber (710) and delivers it to the treatment unit (200).

[0222] In addition, the present embodiment further includes a conversion line (724). The conversion line (724) is configured to be connected from the downstream of one scrubber (710) to the upstream of another scrubber (710), and can change the flow to enable carbon dioxide removal in parallel or series for a pair of scrubbers (710).

[0223] For example, when the flow of fluid is blocked by the conversion line (724), the outside air is distributed to a pair of scrubbers (710), then combined downstream of the scrubbers (710) and then delivered to the treatment unit (200). Therefore, a pair of scrubbers (710) can be arranged in parallel based on the flow of the outside air.

[0224] On the other hand, if the flow of the fluid is permitted by the switching line (724), the outside air passes through one scrubber (710) and then flows into another scrubber (710), and is then delivered to the treatment unit (200). Therefore, a pair of scrubbers (710) can be arranged in series based on the flow of the outside air. However, in this case, the inlet valve and the outlet valve can be switched to restrict the flow of the outside air in one direction instead of distributing or combining the outside air.

[0225] The biodegradation test device according to one embodiment of the present invention can secure independence and stability that can withstand accident situations such as a power outage, a stop of the control device, or a communication disconnection by having an independent control unit, and can guarantee data continuity even in situations such as a communication disconnection by having the control unit independently perform the function of storing and calculating the measurement results of the test.

[0226] In addition, a biodegradation test device according to one embodiment of the present invention is based on a configuration that enables aerobic decomposition testing, but can be converted to conditions that enable anaerobic decomposition testing as needed, thereby ensuring versatility and convenience.

[0227] In addition to the embodiments described above, the present invention may include new embodiments such as combinations of at least two embodiments and combinations of at least one embodiment and known technology.

[0228] Although the detailed description of the present invention described above has been described with reference to preferred embodiments of the present invention, the scope of protection of the present invention is not limited to the above embodiments, and it will be understood that a person having ordinary knowledge in the relevant technical field can modify and change the present invention in various ways without departing from the spirit and technical scope of the present invention.

Claims

1. A treatment unit that supplies outside air to a chamber unit that accommodates a target material for testing biodegradation or treats gas emitted from the chamber unit; and Includes an inspection unit that inspects gas discharged from the above chamber unit, The above processing unit, A distribution unit that receives outside air, distributes it, and delivers at least some of it to the chamber unit; A flow control unit provided downstream of the above distribution unit and controlling the flow rate of air; A flow selection unit for delivering at least a portion of the gas discharged from the chamber unit to the inspection unit; and It includes a control unit that controls the above distribution unit, the flow control unit and the flow selection unit, The above flow control unit, A flow supply device provided downstream of the above distribution unit and delivering the fluid delivered from the above distribution unit to the chamber unit; and A biodegradation test device including a flow diverter provided downstream of the distribution unit and configured to divert fluid delivered from the distribution unit to the flow selection unit by bypassing the chamber unit.

2. In paragraph 1, the control unit, A biodegradation test device, which is connected to an external control device, receives test conditions of the chamber unit from the control device, and controls the flow rate control unit so that the test conditions of the chamber unit are maintained regardless of whether it is connected to the control device during the period from the start to the end of the biodegradation test.

3. In the second paragraph, the control unit, It includes a memory that temporarily stores the measurement data of the inspection unit when the connection with the above control device is disconnected. A biodegradation test device that transmits measurement data stored in the memory to the control device when the connection with the control device is restored.

4. In the first paragraph, the chamber unit, Containing a plurality of test chambers that accommodate the above target material, The above distribution unit distributes external air to one of the test chambers, The above fluid selection unit is a biodegradation test device that transmits gas discharged from the test chamber where the test is performed to the inspection unit.

5. In paragraph 4, the test chamber, A beaker in which the above target material is stored; A housing configured to surround at least a portion of the bottom, top and sides of the beaker; and A cover is attached to the top of the housing to seal the top opening of the beaker, but has an air inlet and a gas outlet. The above housing, It includes a lower plate covering the lower surface of the beaker, an upper ring surrounding the upper part of the beaker, and a plurality of supports provided between the lower plate and the upper ring on the side of the beaker. The above cover, The air inlet is provided in the central part, and the gas outlet is provided in the peripheral part. A cap having a polygonal cross-section and a rod insertion hole is provided in the above peripheral portion, A biodegradation test device comprising an upper plate covering the upper surface of the beaker, and a ring provided on the periphery of the upper plate to fasten the upper plate to the upper ring so that the upper plate seals the beaker.

6. In paragraph 4, the flow diverter, A biodegradation test device that clears the distribution unit, the flow selection unit, and the inspection unit with external air when the biodegradation test is stopped or terminated or the test chamber that is the subject of the biodegradation test is changed.

7. A treatment unit that supplies outside air to a chamber unit that accommodates a target material for testing biodegradation or treats gas emitted from the chamber unit; and Includes an inspection unit that inspects gas discharged from the above chamber unit, The above processing unit, A distribution unit that receives outside air, distributes it, and delivers at least some of it to the chamber unit; A flow control unit provided downstream of the above distribution unit and controlling the flow rate of air; A flow selection unit for delivering at least a portion of the gas discharged from the chamber unit to the inspection unit; and It includes a droplet separation unit that separates droplets from gas discharged from the chamber unit, The above droplet separation unit is, A first filter provided between the chamber unit and the fluid selection unit and collecting droplets; and A biodegradation test device comprising a first pump for transferring droplets separated from the first filter between the flow control unit and the chamber unit.

8. In the 7th paragraph, the droplet separation unit, A second filter provided between the fluid selection unit and the inspection unit and collecting droplets; and A biodegradation test device further comprising a second pump for discharging liquid droplets separated from the second filter to the outside.

9. A treatment unit that supplies outside air to a chamber unit that accommodates a target material for testing biodegradation or treats gas emitted from the chamber unit; and Includes an inspection unit that inspects gas discharged from the above chamber unit, The above processing unit, A distribution unit that receives outside air, distributes it, and delivers at least some of it to the chamber unit; A flow control unit provided downstream of the above distribution unit and controlling the flow rate of air; and Including a flow selection unit that transfers at least a portion of the gas discharged from the chamber unit to the inspection unit; The above chamber unit, Containing a plurality of test chambers that accommodate the above target material, The above distribution unit distributes external air to one of the test chambers, The above fluid selection unit transmits the gas discharged from the test chamber where the test is performed to the inspection unit. The above inspection unit, A status sensor that senses the temperature, pressure and humidity of the gas delivered from the above fluid selection unit; An oxygen sensor that detects oxygen in the gas delivered from the above fluid selection unit; and A biodegradation test device comprising a carbon dioxide sensor that detects carbon dioxide in a gas delivered from the above-mentioned fluid selection unit.

10. In the 9th paragraph, the inspection unit, Further comprising a methane sensor for detecting methane in the gas transmitted from the above fluid selection unit, A biodegradation test device that calculates the total organic carbon amount measured by adding up the organic carbon amounts for carbon dioxide and methane, and calculates the biodegradability by dividing the measured total organic carbon amount by the theoretical total organic carbon amount.

11. In the 9th paragraph, at least one of the status sensor, the oxygen sensor and the carbon dioxide sensor, A high-concentration sensor having a relatively high concentration detection range and a preset error ratio; and A biodegradation test device comprising a low-concentration sensor having a relatively low-concentration detection range and a preset error ratio.

12. In the 9th paragraph, the carbon dioxide sensor, A high-concentration carbon dioxide sensor having a relatively high concentration detection range and a preset error ratio; and A low-concentration carbon dioxide sensor having a detection range of relatively low concentration and a preset error rate is included. The above flow control unit, The air flow rate is controlled so that the carbon dioxide contained in the gas discharged from the chamber unit does not go beyond the detection range of the high-concentration carbon dioxide sensor. The above carbon dioxide sensor, A biodegradation test device that uses the low-concentration carbon dioxide sensor to test at least for a section in which the difference in carbon dioxide between the inoculum (Blank) and the target material is less than the error rate of the high-concentration carbon dioxide sensor.

13. In paragraph 1, It further includes an air filter unit that removes carbon dioxide from the outside air flowing into the above treatment unit. The above air filter unit, Two or more scrubbers filled with carbon dioxide absorbent material; An inlet line for delivering outside air to the scrubber; An exhaust line that delivers outside air discharged from the above scrubber to the above treatment unit; and A biodegradation test device comprising a switching line connecting the two or more scrubbers so that the flow of outside air is switched for the scrubbers.

14. A treatment unit that supplies outside air to a chamber unit that accommodates a target material for testing biodegradation or treats gas emitted from the chamber unit; and Includes an inspection unit that inspects gas discharged from the above chamber unit, The above processing unit, A distribution unit that receives outside air, distributes it, and delivers at least some of it to the chamber unit; A flow control unit provided downstream of the above distribution unit and controlling the flow rate of air; A flow selection unit for delivering at least a portion of the gas discharged from the chamber unit to the inspection unit; and Includes a test change unit that changes the test conditions of the above chamber unit, The above test change department, The open-pass test conditions are applied so that the outside air is delivered to the chamber unit through the distribution unit and the flow control unit. A biodegradation test device that recirculates gas discharged from the above inspection unit to the above chamber unit to apply closed-circuit test conditions.

15. In paragraph 14, A vent section for discharging gas passing through the above inspection unit to the outside; A gas circulation unit connected between the flow control unit and the chamber unit downstream of the above inspection unit; and It further includes a droplet separation unit that separates droplets from the gas discharged from the chamber unit and delivers them to the chamber unit. The above gas circulation part, It is connected downstream from the point where the droplets are introduced by the droplet separation unit downstream of the above flow control unit, The above test change department, A biodegradation test device that applies open-pass test conditions or closed-circuit test conditions by controlling a first valve provided at a point where droplets are introduced by the droplet separation unit downstream of the above-mentioned flow control unit and a second valve provided at a point where the gas circulation unit branches downstream of the above-mentioned inspection unit.

Images