Non-dosing integrated sewage treatment device and treatment method

Abstract

The invention relates to a non-dosing integrated sewage treatment device and a treatment method.The non-dosing integrated sewage treatment device comprises a septic tank, an adjusting tank, an anaerobic tank, an aerobic tank, a sedimentation tank and a disinfection tank, a grating is arranged in the septic tank, and an inner cavity of the septic tank is divided into a domestic wastewater containing cavity and a filtered water containing cavity by the grating; a water outlet of the septic tank is communicated with the filtered water accommodating cavity, a water outlet of the septic tank is communicated with a water inlet of the regulating tank, a water outlet of the regulating tank is communicated with a water inlet of the anaerobic tank, a water outlet of the anaerobic tank is communicated with a water inlet of the aerobic tank, a water outlet of the aerobic tank is communicated with a water inlet of the settling tank, and a water outlet of the settling tank is communicated with a water outlet of the sewage treatment tank. And the water outlet of the sedimentation tank is communicated with the water inlet of the disinfection tank. The chemical-free integrated sewage treatment device disclosed by the invention can realize integrated and comprehensive physical filtration treatment on sewage, so that the sewage treatment efficiency is greatly improved, meanwhile, the cleaning labor intensity of workers is reduced, and the chemical-free integrated sewage treatment device is convenient to use by the workers.

Description

Technical Field

[0001] The present invention relates to the technical field related to sewage treatment, and in particular to an integrated sewage treatment device and a treatment method without adding chemicals. Background Art

[0002] At present, sewage treatment processes generally determine the degree of sewage treatment and the corresponding treatment process based on the utilization or discharge destination of urban sewage and considering the natural purification capacity of the water body. The treated sewage, whether used in industry, agriculture or as reclaimed water for irrigation and greening, must meet the relevant water quality standards issued by the state. Sewage treatment often uses a variety of different processes for treatment, such as physical processes, which mainly use physical methods to separate, precipitate or filter impurities in sewage, mainly including screen pretreatment, precipitation and filtration; chemical processes, which are to add chemical agents to cause pollutants in sewage to coagulate, precipitate or redox reaction, thereby achieving sewage purification; biological processes, which use microorganisms to degrade organic matter in sewage, thereby achieving purification, but biological treatment has certain requirements for sewage quality, water temperature, dissolved oxygen content in water, pH value, etc. Summary of the invention

[0003] In order to solve one or more technical problems existing in the prior art, the present invention provides an integrated sewage treatment device and a treatment method without adding chemicals.

[0004] The technical solution of the present invention to solve the above technical problems is as follows: a drug-free integrated sewage treatment device, comprising a septic tank, a regulating tank, an anaerobic tank, an aerobic tank, a sedimentation tank and a disinfection tank, wherein a grille is provided in the septic tank, and the inner cavity of the septic tank is divided into a domestic wastewater containing cavity and a filtered water containing cavity by the grille, the drain outlet of the septic tank is connected to the filtered water containing cavity, the drain outlet is connected to the water inlet of the regulating tank, the water outlet of the regulating tank is connected to the water inlet of the anaerobic tank, the water outlet of the anaerobic tank is connected to the water inlet of the aerobic tank, the water outlet of the aerobic tank is connected to the water inlet of the sedimentation tank, and the water outlet of the sedimentation tank is connected to the water inlet of the disinfection tank.

[0005] The beneficial effects of the present invention are as follows: the integrated sewage treatment device without adding chemicals of the present invention passes the sewage into an anaerobic tank, and the suspended pollutants and soluble organic matter in the sewage are hydrolyzed and acidified under the denitrification action of heterotrophic bacteria under anoxic conditions, and then enters an aerobic tank, where the organic matter in the sewage is absorbed, digested and removed under the metabolism of various aerobic microorganisms, and the sewage is purified after sedimentation separation in a sedimentation tank and ultraviolet disinfection, thereby realizing integrated and comprehensive physical filtration treatment of the sewage, greatly improving the treatment efficiency of the sewage, while reducing the labor intensity of cleaning by the staff, and facilitating the use of the staff.

[0006] Based on the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, an aeration mechanism for oxygenation and stirring is provided in the regulating tank, and the aeration mechanism is connected to the fan through a ventilation pipe.

[0008] Furthermore, an MBR membrane is provided in the sedimentation tank, and the MBR membrane separates the sedimentation tank into a first cavity and a second cavity. The water inlet of the sedimentation tank is connected with the first cavity, and the water outlet of the sedimentation tank is connected with the second cavity. The wastewater entering the sedimentation tank is filtered through the MBR membrane and then enters the disinfection tank. The sediment is retained in the first cavity, and the filtered wastewater enters the disinfection tank through the second cavity.

[0009] Furthermore, a sludge pipe is provided at the bottom of the first chamber of the sedimentation tank, and the sludge pipe is connected to the sludge tank.

[0010] Furthermore, the upper part of the sludge tank is connected to the regulating tank through a supernatant return pipe.

[0011] Furthermore, the bottom of the second chamber is connected to the anaerobic tank through a sedimentation tank return pipe.

[0012] Furthermore, the aerobic tank and the sedimentation tank are both connected to the fan through a ventilation pipe, the disinfection tank is disinfected by ultraviolet disinfection equipment, and the disinfection tank is also connected to a reclaimed water tank.

[0013] Furthermore, the bottom of the aerobic tank is connected to the bottom of the anaerobic tank through an aerobic reflux pipe.

[0014] Furthermore, the aerobic pool comprises a first treatment section and a second treatment section which are arranged in sequence, and the organic load of the filler in the first treatment section is higher than the organic load of the filler in the second treatment section.

[0015] A method for treating sewage using the above-mentioned integrated sewage treatment device without adding chemicals comprises the following steps:

[0016] S1, after the domestic sewage enters the septic tank for sedimentation, it is filtered through a screen to remove soft entanglements, larger solid particles and suspended matter in the domestic sewage;

[0017] S2, domestic sewage is filtered through the screen and then enters the regulating tank for water quantity and quality regulation and homogenization;

[0018] S3, the sewage discharged from the regulating tank enters the anaerobic tank, and the biological elastic filler in the anaerobic tank is used as a bacterial carrier. The insoluble organic matter in the sewage is converted into soluble organic matter by facultative microorganisms, and the macromolecular organic matter is hydrolyzed into small molecular organic matter. At the same time, the nitrate nitrogen returned from the aerobic tank is partially nitrified and denitrified under the action of nitrifying bacteria to remove ammonia nitrogen;

[0019] S4, the sewage treated in the anaerobic tank enters the aerobic tank. Under the condition of high organic load in the first treatment stage of the aerobic tank, various organic substances in the sewage are removed through biodegradation and adsorption by a large number of microbial communities of different species attached to the filler in the first treatment stage; under the condition of low organic load in the second treatment stage of the aerobic tank, ammonia nitrogen in the sewage is degraded by nitrifying bacteria under the condition of sufficient oxygen, and the COD value in the sewage is also reduced, so that the sewage is purified;

[0020] S5, the sewage after being purified in the aerobic tank enters the sedimentation tank for solid-liquid separation, removes the biofilm and suspended sludge in the sewage, and obtains secondary purified water;

[0021] S6, the secondary purified water discharged from the sedimentation tank flows into the disinfection tank for disinfection, and the disinfected secondary purified water is recycled.

[0022] The beneficial effects of the present invention are as follows: the sewage treatment method of the present invention is suitable for treating sewage with a high solid concentration, has a high solid removal rate, does not cause secondary pollution, and has little impact on the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the process of the integrated sewage treatment device without adding chemicals of the present invention.

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] 1. Septic tank; 2. Screen; 3. Equalization tank; 4. Anaerobic tank; 5. Aerobic tank; 6. Sedimentation tank; 7. Disinfection tank; 8. Grey water tank; 9. Fan; 10. Sludge tank; 11. Ventilation pipe; 12. Sludge pipe; 13. Supernatant return pipe; 14. Sedimentation tank return pipe; 15. Aerobic return pipe. DETAILED DESCRIPTION

[0026] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0027] like Figure 1As shown, a drug-free integrated sewage treatment device of the present embodiment comprises a septic tank 1, a regulating tank 3, an anaerobic tank 4, an aerobic tank 5, a sedimentation tank 6 and a disinfection tank 7. A grille 2 is provided in the septic tank 1. The inner cavity of the septic tank 1 is divided into a domestic wastewater containing cavity and a filtered water containing cavity by the grille 2. The drain outlet of the septic tank 1 is communicated with the filtered water containing cavity, the drain outlet is communicated with the water inlet of the regulating tank 3, the water outlet of the regulating tank 3 is communicated with the water inlet of the anaerobic tank 4, the water outlet of the anaerobic tank 4 is communicated with the water inlet of the aerobic tank 5, the water outlet of the aerobic tank 5 is communicated with the water inlet of the sedimentation tank 6, and the water outlet of the sedimentation tank 6 is communicated with the water inlet of the disinfection tank 7.

[0028] A specific solution of this embodiment is that an aeration mechanism for oxygenation and stirring is provided in the regulating tank 3 , and the aeration mechanism is connected to the fan 9 through a ventilation pipe 11 .

[0029] Specifically, an MBR membrane is provided in the sedimentation tank 6, and the MBR membrane divides the sedimentation tank 6 into a first cavity and a second cavity. The water inlet of the sedimentation tank 6 is connected with the first cavity, and the water outlet of the sedimentation tank 6 is connected with the second cavity. The wastewater entering the sedimentation tank 6 enters the disinfection tank after being filtered through the MBR membrane, and the sediment is retained in the first cavity. The filtered wastewater enters the disinfection tank through the second cavity.

[0030] like Figure 1 As shown, specifically, a sludge pipe 12 is provided at the bottom of the first chamber of the sedimentation tank 6, and the sludge pipe 12 is connected to the sludge tank 10. The bottom of the second chamber is connected to the anaerobic tank 4 through a sedimentation tank return pipe 14.

[0031] like Figure 1 As shown, specifically, the upper part of the sludge tank 10 is connected to the regulating tank 3 through a supernatant return pipe 13 .

[0032] like Figure 1 As shown, specifically, the aerobic tank 5 and the sedimentation tank 6 are both connected to the fan 9 through the ventilation pipe 11, the disinfection tank 7 is disinfected by ultraviolet disinfection equipment, and the disinfection tank 7 is also connected to the intermediate water tank 8.

[0033] like Figure 1 As shown, specifically, the bottom of the aerobic tank 5 is connected to the bottom of the anaerobic tank 4 through an aerobic reflux pipe 15. The aerobic tank 5 includes a first treatment section and a second treatment section arranged in sequence, and the organic load of the filler in the first treatment section is higher than the organic load of the filler in the second treatment section.

[0034] The control system of the integrated sewage treatment device of this embodiment adopts a two-level distributed control system. The first level is a monitoring computer, which is located in the central control room. The monitoring computer in the central control room is installed with monitoring software, which can monitor the entire process of the sewage treatment plant operation. The data collected by the sensor is transmitted to the central control unit by wired or wireless means to complete the logging, storage, display and query of control events, fault alarms, historical data, production indicators, and historical trend curves. The second level is the field control substation, which processes and analyzes the collected data, compares it with the preset processing parameters, and adjusts the equipment through the actuator (inverter, relay, etc.) according to the results of data processing. The control substation is composed of a PLC, and each PLC substation has a CPU module, a power module and an I / O module, which can operate independently.

[0035] The integrated sewage treatment device of this embodiment can be connected to the site substation through an external drainage pipe. Specifically, the intermediate water tank can be connected to the site substation through the external drainage pipe. The start and stop of the water pump on the external drainage pipe is controlled by the water level controller in the intermediate water tank. The switching of the water pump and the aeration mechanism can also be completed automatically. At the same time, the system is equipped with overload protection and power-off protection functions.

[0036] The drug-free integrated sewage treatment device of the present embodiment passes the sewage into an anaerobic tank, where the suspended pollutants and soluble organic matter in the sewage are hydrolyzed and acidified under the denitrification action of heterotrophic bacteria under anoxic conditions, and then enters the aerobic tank. The organic matter in the sewage is absorbed, digested and removed under the metabolism of various aerobic microorganisms, and the sewage is purified after sedimentation and separation in a sedimentation tank and ultraviolet disinfection, thereby realizing integrated and comprehensive physical filtration treatment of the sewage, greatly improving the treatment efficiency of the sewage, while reducing the labor intensity of cleaning by the staff, and facilitating the use of the staff.

[0037] This embodiment also provides a method for treating sewage using the above-mentioned integrated sewage treatment device without adding chemicals, comprising the following steps:

[0038] S1, after the domestic sewage enters the septic tank 1 for sedimentation, it is filtered through the screen 2 to remove soft entanglements, larger solid particles and suspended matter in the domestic sewage; this is mainly to protect the service life of subsequent working water pumps and reduce the system processing workload.

[0039] S2, domestic sewage is filtered through the grille 2 and then enters the regulating tank 3 for homogenization of water quantity and water quality; ensuring the balance and stability of water quantity and water quality in the subsequent biochemical treatment system, and through the aeration mechanism set in the regulating tank, it is used for oxygenation and stirring to prevent suspended particles in the sewage from settling and stinking, and it also has a certain degradation effect on organic matter in the sewage, thereby improving the impact resistance and treatment effect of the entire system.

[0040] S3, the sewage discharged from the regulating tank 3 enters the anaerobic tank 4, and the biological elastic filler in the anaerobic tank 4 is used as a bacterial carrier. The insoluble organic matter in the sewage is converted into soluble organic matter by facultative microorganisms, and the macromolecular organic matter is hydrolyzed into small molecular organic matter. At the same time, the nitrate nitrogen returned from the aerobic tank 5 is partially nitrified and denitrified under the action of nitrifying bacteria to remove ammonia nitrogen;

[0041] S4, the sewage treated in the anaerobic tank 4 enters the aerobic tank 5. Under the condition of a higher organic load in the first treatment section of the aerobic tank 5, various organic substances in the sewage are removed through the biodegradation and adsorption of a large number of microbial communities of different species attached to the filler in the first treatment section; under the condition of a lower organic load in the second treatment section of the aerobic tank 5, the ammonia nitrogen in the sewage is degraded under the condition of sufficient oxygen through the action of nitrifying bacteria, and the COD value in the sewage is also reduced, so that the sewage is purified;

[0042] As the core part of sewage treatment, the aerobic pool is divided into two sections. In the first section, under high organic load, various organic substances in sewage are removed through biodegradation and adsorption by a large number of microbial communities of different species attached to the filler, which greatly reduces the organic content in sewage. In the second section, under low organic load, ammonia nitrogen in sewage is degraded by nitrifying bacteria under sufficient oxygen conditions, and the COD value in sewage is also reduced to a lower level, so that the sewage can be purified.

[0043] S5, the sewage after being purified by the aerobic tank 5 enters the sedimentation tank 6 for solid-liquid separation, and the biofilm and suspended sludge peeled off in the anaerobic tank and the aerobic tank in the sewage are removed to obtain secondary purified water;

[0044] S6, the secondary purified water discharged from the sedimentation tank 6 flows into the disinfection tank for disinfection, and the disinfected secondary purified water is recycled. Thus, no chemicals are added in the true sense, the effluent water quality meets the requirements of the hygienic index, and the purpose of reasonable external discharge and reclaimed water reuse is achieved.

[0045] The sewage treatment method of this embodiment is suitable for treating sewage with a high solid concentration, has a high solid removal rate, does not cause secondary pollution, and has little impact on the environment.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0051] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A non-chemical integrated sewage treatment device, characterized in that: It includes a septic tank, a regulating tank, an anaerobic tank, an aerobic tank, a sedimentation tank and a disinfection tank. A grille is provided in the septic tank. The inner cavity of the septic tank is divided into a domestic wastewater containing cavity and a filtered water containing cavity by the grille. The drain outlet of the septic tank is communicated with the filtered water containing cavity, the drain outlet is communicated with the water inlet of the regulating tank, the water outlet of the regulating tank is communicated with the water inlet of the anaerobic tank, the water outlet of the anaerobic tank is communicated with the water inlet of the aerobic tank, the water outlet of the aerobic tank is communicated with the water inlet of the sedimentation tank, and the water outlet of the sedimentation tank is communicated with the water inlet of the disinfection tank.

2. According to claim 1, a non-drug integrated sewage treatment device is characterized in that: An aeration mechanism for oxygenation and stirring is provided in the regulating tank, and the aeration mechanism is connected to the fan through a ventilation pipe.

3. According to claim 1, a chemical-free integrated sewage treatment device is characterized in that: An MBR membrane is provided in the sedimentation tank, and the MBR membrane separates the sedimentation tank into a first cavity and a second cavity. The water inlet of the sedimentation tank is connected to the first cavity, and the water outlet of the sedimentation tank is connected to the second cavity. The wastewater entering the sedimentation tank enters the disinfection tank after being filtered through the MBR membrane, and the sediment is retained in the first cavity. The filtered wastewater enters the disinfection tank through the second cavity.

4. According to claim 3, a chemical-free integrated sewage treatment device is characterized in that: A sludge pipe is provided at the bottom of the first chamber of the sedimentation tank, and the sludge pipe is communicated with the sludge tank.

5. The non-drug integrated sewage treatment device according to claim 4 is characterized in that: The upper part of the sludge tank is connected with the regulating tank through a supernatant liquid reflux pipe.

6. The non-drug integrated sewage treatment device according to claim 3 is characterized in that: The bottom of the second chamber is connected to the anaerobic tank through a sedimentation tank return pipe.

7. The non-drug integrated sewage treatment device according to claim 1 is characterized in that: The aerobic tank and the sedimentation tank are both connected to the fan through a ventilation pipe. The disinfection tank is disinfected by ultraviolet disinfection equipment. The disinfection tank is also connected to a reclaimed water tank.

8. The integrated sewage treatment device without adding chemicals according to claim 1 is characterized in that: The bottom of the aerobic tank is connected with the bottom of the anaerobic tank through an aerobic reflux pipe.

9. The integrated sewage treatment device without adding chemicals according to claim 1, characterized in that: The aerobic pool comprises a first treatment section and a second treatment section which are arranged in sequence, and the organic load of the filler in the first treatment section is higher than the organic load of the filler in the second treatment section.

10. A method for treating sewage using the integrated sewage treatment device without adding chemicals as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1, after the domestic sewage enters the septic tank for sedimentation, it is filtered through a screen to remove soft entanglements, solid particles and suspended matter in the domestic sewage; S2, domestic sewage is filtered through the screen and then enters the regulating tank for water quantity and quality regulation and homogenization; S3, the sewage discharged from the regulating tank enters the anaerobic tank, and the biological elastic filler in the anaerobic tank is used as a bacterial carrier. The insoluble organic matter in the sewage is converted into soluble organic matter by facultative microorganisms, and the macromolecular organic matter is hydrolyzed into small molecular organic matter. At the same time, the nitrate nitrogen returned from the aerobic tank is partially nitrified and denitrified under the action of nitrifying bacteria to remove ammonia nitrogen; S4, the sewage treated in the anaerobic tank enters the aerobic tank. Under the condition of high organic load in the first treatment stage of the aerobic tank, various organic substances in the sewage are removed through biodegradation and adsorption by a large number of microbial communities of different species attached to the filler in the first treatment stage; under the condition of low organic load in the second treatment stage of the aerobic tank, ammonia nitrogen in the sewage is degraded by nitrifying bacteria under the condition of sufficient oxygen, and the COD value in the sewage is also reduced, so that the sewage is purified; S5, the sewage after being purified in the aerobic tank enters the sedimentation tank for solid-liquid separation, removes the biofilm and suspended sludge in the sewage, and obtains secondary purified water; S6, the secondary purified water discharged from the sedimentation tank flows into the disinfection tank for disinfection, and the disinfected secondary purified water is recycled.

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