Biological sewage treatment test device and use method thereof

Abstract

The invention discloses a biological sewage treatment test device and a use method thereof, and belongs to the field of sewage treatment. The system comprises a plurality of reaction tanks which are sequentially communicated and a sedimentation tank, wherein the plurality of reaction tanks are sequentially a first reaction tank, a second reaction tank, a third reaction tank, a fourth reaction tank, a fifth reaction tank, a sixth reaction tank, a seventh reaction tank, an eighth reaction tank, a first aerobic tank, a second aerobic tank, an anoxic tank and a third aerobic tank; the adjacent reaction tanks can be communicated or disconnected; the reaction tanks are provided with connectors, valves are arranged on the connectors, and hoses are arranged on the connectors, so that the reaction tanks are communicated with one another, and the reaction tanks are communicated with the sedimentation tank, and different process modes are formed. A five-section process mode, a multi-section and multi-stage AO process mode and an MBBR process mode are formed according to different communication modes between the reaction tanks and between the reaction tanks and the sedimentation tank. According to the invention, process operation conditions can be changed, and different operation processes can be switched.

Description

Technical Field

[0001] The invention belongs to the field of sewage treatment, and in particular relates to a sewage biological treatment test device and a use method thereof. Background Art

[0002] Wastewater treatment is of great significance for protecting human health, promoting economic development and protecting the ecological environment. Through effective sewage treatment, we can reduce the spread of diseases, improve the efficiency of water resource utilization, and promote ecological balance and sustainable development. Biological treatment uses the metabolism of microorganisms to decompose organic matter. It is one of the most important sewage treatment methods, mainly including activated sludge method and biofilm method. However, the influent quality of each sewage treatment plant is different. Before large-scale design, a small test device can be used to preliminarily evaluate the effect and feasibility of the treatment process and determine the optimal design parameters. Therefore, it is very necessary to develop a sewage biological treatment test device that can switch process flow and adjust operating parameters. Summary of the invention

[0003] The object of the present invention is to provide a sewage biological treatment test device, so as to facilitate sewage treatment plants to carry out a variety of process tests and evaluations.

[0004] Another object of the present invention is to provide a method for using a sewage biological treatment test device.

[0005] The technical scheme of the present invention is: a sewage biological treatment test device, comprising a plurality of reaction tanks and sedimentation tanks connected in sequence, wherein the plurality of reaction tanks are the first reaction tank, the second reaction tank, the third reaction tank, the fourth reaction tank, the fifth reaction tank, the sixth reaction tank, the seventh reaction tank, the eighth reaction tank, the first aerobic tank, the second aerobic tank, the anoxic tank, and the third aerobic tank in sequence; the adjacent reaction tanks can be connected or disconnected; the reaction tanks are provided with interfaces, and the interfaces are provided with valves, and the reaction tanks are connected with each other and the reaction tanks are connected with the sedimentation tank by installing a hose on the interface, thereby forming different process modes. The first reaction tank, the second reaction tank, the third reaction tank, the fourth reaction tank, the fifth reaction tank, the sixth reaction tank, the seventh reaction tank, and the eighth reaction tank can be used as a pre-anoxic tank, an anaerobic tank, an anoxic tank, or an aerobic tank according to the process mode.

[0006] As a further improvement of the present invention, in order to save space and reasonably arrange the reaction pools, the first reaction pool, the second reaction pool, the third reaction pool, the fourth reaction pool, the fifth reaction pool, the sixth reaction pool, the seventh reaction pool and the eighth reaction pool are designed as a whole to constitute a first pool body unit, and the first pool body unit is divided into the above-mentioned reaction pools by multiple first partitions, and a first connecting port is provided on the first partition for communication with adjacent reaction pools, and a first plug plate is detachably connected to the first connecting port; the first aerobic pool, the second aerobic pool, the anoxic pool and the third aerobic pool are designed as a whole to constitute a second pool body unit, and the second pool body unit is divided into the above-mentioned reaction pools by multiple second partitions, and a second connecting port is provided on the second partition for communication with adjacent reaction pools, and a second plug plate is detachably connected to the second connecting port.

[0007] As a further improvement of the present invention, the interfaces are specifically arranged as follows: the first reaction pool is provided with a first unit A interface and a first unit B interface; the second reaction pool is provided with a first unit C interface; the third reaction pool is provided with a first unit D interface, a first unit E interface and a first unit F interface; the fourth reaction pool is provided with a first unit G interface, a first unit H interface and a first unit I interface; the fifth reaction pool is provided with a first unit J interface; the seventh reaction pool is provided with a first unit K interface and a first unit L interface; the eighth reaction pool is provided with a first unit M interface and a first unit N interface; the first aerobic pool is provided with a second unit A interface, a second unit B interface and a second unit C interface; the second aerobic pool is provided with a second unit D interface and a second unit E interface; the anoxic pool is provided with a second unit F interface, a second unit G interface, a second unit H interface and a second unit K interface; the third aerobic pool is provided with a second unit I interface and a second unit J interface.

[0008] As a further improvement of the present invention, the sedimentation tank adopts a vertical flow sedimentation tank, an intermediate guide tube is provided at the upper part of the sedimentation tank, and the sedimentation tank is provided with a sewage outlet, a sludge return port and a sludge outlet.

[0009] As a further improvement of the present invention, two or more sedimentation tanks are provided, and the sedimentation tanks are connected in parallel.

[0010] As a further improvement of the present invention, each reaction pool of the first pool body unit is provided with a first sampling port, each reaction pool of the second pool body unit is provided with a second sampling port, the sedimentation tank is provided with a third sampling port, and valves are provided on the first sampling port, the second sampling port and the third sampling port.

[0011] As a further improvement of the present invention, different process modes are formed according to different connection modes between reaction tanks and between reaction tanks and precipitation tanks. The specific process modes and their connection modes are as follows: A. Five-stage process mode: all the first plug plates and the second plug plates are pulled out, and the N interface of the first unit is connected to the A interface of the second unit; the output end of the sewage inlet pump is respectively connected to the A interface of the first unit, the C interface of the first unit, the D interface of the first unit, and the F interface of the second unit; the J interface of the second unit is connected to the intermediate guide tube; the D interface of the second unit is connected to the F interface of the first unit and a first nitrification liquid reflux pump is provided therebetween; the I interface of the second unit is connected to the H interface of the second unit and a second nitrification liquid reflux pump is provided therebetween; the sludge reflux port is connected to the B interface of the first unit and a sludge reflux pump is provided therebetween; the dosing box is respectively connected to the E interface of the first unit and the G interface of the second unit through the carbon source dosing pump; the first reaction tank is used as a pre-anoxic tank, the second reaction tank is used as an anaerobic tank, the third reaction tank, the fourth reaction tank, the fifth reaction tank and the sixth reaction tank are all used as anoxic tanks; the seventh reaction tank and the eighth reaction tank are used as aerobic tanks; B. Multi-stage multi-stage AO process mode: All first plug plates are pulled out, and the second tank unit is not used; the output end of the sewage inlet pump is respectively connected to the first unit A interface, the first unit G interface, and the first unit K interface; the first unit N interface is connected to the middle guide tube; the sludge return port is connected to the first unit B interface and a sludge return pump is provided therebetween; the dosing box is connected to the first unit L interface through a carbon source dosing pump; the first reaction tank and the second reaction tank are used as anaerobic tanks, the third reaction tank, the sixth reaction tank, and the eighth reaction tank are used as aerobic tanks, and the fourth reaction tank, the fifth reaction tank, and the seventh reaction tank are used as anoxic tanks; C. MBBR process mode: interception nets are installed at the first connecting port between the first reaction tank and the second reaction tank, the first connecting port between the second reaction tank and the third reaction tank, and the first connecting port between the third reaction tank and the fourth reaction tank; a first plug plate is installed at the first connecting port between the fourth reaction tank and the fifth reaction tank, and the fifth reaction tank, the sixth reaction tank, the seventh reaction tank, the eighth reaction tank, the first aerobic tank, the second aerobic tank, the anoxic tank, and the third aerobic tank are not used; the output end of the sewage inlet pump is respectively connected to the first unit A interface, the first unit C interface, and the first unit D interface; the first unit I interface is connected to the middle guide tube; the first unit H interface is connected to the first unit F interface and a first nitrification liquid reflux pump is provided therebetween; the sludge reflux port is connected to the first unit B interface and a sludge reflux pump is provided therebetween; the dosing box is connected to the first unit E interface through a carbon source dosing pump; the first reaction tank is used as a pre-anoxic tank, the second reaction tank is used as an anaerobic tank, the third reaction tank is used as an anoxic tank, and the fourth reaction tank is used as an aerobic tank.

[0012] The beneficial effects of the present invention are as follows: the device of the present invention has a simple structure, rich functions, and flexible process adjustment methods. By connecting the reaction tank interfaces and installing the plug-in board, the operating conditions of the process can be changed, and different operating processes can be switched. It has strong functional expansibility, and a set of devices can carry out multiple sewage biological treatment experiments. In addition, the device is low in cost, easy to transport and build, reusable, and freely combined, and has high application value in the field of sewage treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the sewage biological treatment test device of the present invention; Figure 2 It is a schematic diagram of the structure of the sedimentation tank in the present invention; Figure 3 It is a device structure diagram of the sewage biological treatment test device of the present invention when the five-stage process mode is carried out; Figure 4 It is a process flow chart of the sewage biological treatment test device of the present invention when the five-stage process mode is carried out; Figure 5 It is a device structure diagram of the sewage biological treatment test device of the present invention when performing a multi-stage multi-level AO process mode; Figure 6 It is a process flow chart of the sewage biological treatment test device of the present invention when the multi-stage multi-level AO process mode is carried out; Figure 7 This is a device structure diagram of the sewage biological treatment test device of the present invention when the MBBR process mode is carried out; Figure 8 It is a process flow chart of the sewage biological treatment test device of the present invention when the MBBR process mode is carried out.

[0014] In the figure: 1-first pool body unit; 101-first reaction pool; 102-second reaction pool; 103-third reaction pool; 104-fourth reaction pool; 105-fifth reaction pool; 106-sixth reaction pool; 107-seventh reaction pool; 108-eighth reaction pool; 110-first partition; 120-first connecting port; 130-first plug plate; 140-intercepting net; 2-second pool body unit; 201-first aerobic pool; 202-second aerobic pool; 203-anoxic pool; 204 - the third aerobic tank; 210 - the second partition; 220 - the second connecting port; 3 - sedimentation tank; 301 - the middle guide tube; 302 - the bell mouth; 303 - the reflector; 304 - the mud bucket; 305 - the sewage outlet; 306 - the sludge return port; 307 - the sludge outlet; 401 - the sewage inlet pump; 402 - the carbon source dosing pump; 403 - the first nitrification liquid return pump; 404 - the second nitrification liquid return pump; 405 - the sludge return pump; 5 - the dosing box; 601 - the first unit A interface; 6 02-first unit B interface; 603-first unit C interface; 604-first unit D interface; 605-first unit E interface; 606-first unit F interface; 607-first unit G interface; 608-first unit I interface; 609-first unit J interface; 610-first unit K interface; 611-first unit L interface; 612-first unit M interface; 613-first unit N interface; 614-second unit A interface; 615-second unit B interface; 6 16-second unit C interface; 617-second unit D interface; 618-second unit E interface; 619-second unit F interface; 620-second unit G interface; 621-second unit H interface; 622-second unit I interface; 623-second unit J interface; 624-first unit H interface; 625-second unit K interface; 701-first sampling port; 702-second sampling port; 703-third sampling port; 8-aeration device; 9-blower; 10-mixer. DETAILED DESCRIPTION

[0015] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] Embodiment 1, like Figure 1 , Figure 2As shown, a sewage biological treatment test device includes a plurality of reaction tanks connected in sequence, and a sedimentation tank 3, wherein the plurality of reaction tanks are a first reaction tank 101, a second reaction tank 102, a third reaction tank 103, a fourth reaction tank 104, a fifth reaction tank 105, a sixth reaction tank 106, a seventh reaction tank 107, an eighth reaction tank 108, a first aerobic tank 201, a second aerobic tank 202, an anoxic tank 203, and a third aerobic tank 204; adjacent reaction tanks can be connected or disconnected; an interface is provided on the reaction tank, and a valve is provided on the interface, and a hose is installed on the interface to connect the reaction tanks and the reaction tanks and the sedimentation tank 3, thereby forming different process modes.

[0017] The first reaction pool 101, the second reaction pool 102, the third reaction pool 103, the fourth reaction pool 104, the fifth reaction pool 105, the sixth reaction pool 106, the seventh reaction pool 107, and the eighth reaction pool 108 are designed as a whole, constituting a first pool body unit 1, which is divided into the above-mentioned reaction pools by a plurality of first partitions 110, the first partitions 110 are provided with a first connecting port 120 for connecting adjacent reaction pools, and a first plug plate 130 is detachably connected to the first connecting port 120; the first aerobic pool 201, the second aerobic pool 202, the anoxic pool 203, and the third aerobic pool 204 are designed as a whole, constituting a second pool body unit 2, which is divided into the above-mentioned reaction pools by a plurality of second partitions 210, the second partitions 210 are provided with a second connecting port 220 for connecting adjacent reaction pools, and a second plug plate is detachably connected to the second connecting port 220.

[0018] The interfaces are specifically arranged as follows: the first reaction pool 101 is provided with a first unit A interface 601 and a first unit B interface 602; the second reaction pool 102 is provided with a first unit C interface 603; the third reaction pool 103 is provided with a first unit D interface 604, a first unit E interface 605 and a first unit F interface 606; the fourth reaction pool 104 is provided with a first unit G interface 607, a first unit H interface 630 and a first unit I interface 608; the fifth reaction pool 105 is provided with a first unit J interface 609; the seventh reaction pool 107 is provided with a first unit K interface 610 and a first unit L interface 611. Interface 611; the eighth reaction tank 108 is provided with a first unit M interface 612 and a first unit N interface 613; the first aerobic tank 201 is provided with a second unit A interface 614, a second unit B interface 615 and a second unit C interface 616; the second aerobic tank 202 is provided with a second unit D interface 617 and a second unit E interface 618; the anoxic tank 203 is provided with a second unit F interface 619, a second unit G interface 620, a second unit H interface 621 and a second unit K interface 625; the third aerobic tank 204 is provided with a second unit I interface 622 and a second unit J interface 623.

[0019] The sedimentation tank 3 adopts a vertical flow sedimentation tank with a size of diameter × height 1.5 × 2.0m. The upper part of the sedimentation tank 3 is provided with an intermediate guide tube 301 with a diameter of 0.2m. The intermediate guide tube 301 is connected to a bell mouth 302 of 0.2m × 0.3m. The total length of the intermediate guide tube 301 and the bell mouth 302 is 0.8m. The lower end of the bell mouth 302 is connected to a reflecting plate 303. The lower end of the bell mouth 303 is 0.3m away from the lower end of the reflecting plate 303. A mud bucket 304 is provided at a position 0.3m away from the lower end of the reflecting plate 303. The mud bucket 304 has an angle of 135° and a height of 0.6m. The sedimentation tank 3 is provided with a sewage outlet 305, a sludge return port 306 and a sludge outlet 307. The sewage outlet 305 is 1.5m away from the ground, the sludge return port 306 is 0.3m away from the ground, and the sludge outlet 307 is 0.1m away from the ground.

[0020] There are two or more sedimentation tanks 3, and each sedimentation tank 3 is connected in parallel.

[0021] Each reaction pool of the first pool body unit 1 is provided with a first sampling port 701, each reaction pool of the second pool body unit 2 is provided with a second sampling port 702, and the sedimentation pool 3 is provided with a third sampling port 703. Valves are provided on the first sampling port 701, the second sampling port 702 and the third sampling port 703.

[0022] The dimensions (length×width×height) of the first reaction tank 101 and the second reaction tank 102 are 1.0 m×0.4 m×1.8 m, respectively; the dimensions (length×width×height) of the third reaction tank 103, the fourth reaction tank 104, the fifth reaction tank 105, the sixth reaction tank 106, the seventh reaction tank 107, the eighth reaction tank 108, the first aerobic tank 201, and the second aerobic tank 202 are 1.0 m×0.825 m×1.8 m, respectively; the dimensions (length×width×height) of the anoxic tank 203 and the third aerobic tank 204 are 1.0 m×0.7 m×1.8 m, respectively.

[0023] According to the different connection modes between the reaction tanks and the reaction tanks and between the reaction tanks and the sedimentation tank 3, different process modes are formed, the operating conditions of the process can be changed and different operating processes can be switched to meet the treatment load and hydraulic retention time of different process modes. The test device of the present invention can simulate three commonly used biological treatment processes, including the improved five-stage process, the multi-stage multi-stage AO process and the MBBR process.

[0024] 1. Five-stage process mode like Figure 3As shown, all the first plugboards 130 and the second plugboards are pulled out, and the first unit N interface 613 and the second unit A interface 614 are connected through a hose; the output end of the sewage inlet pump 401 is respectively connected to the first unit A interface 601, the first unit C interface 603, the first unit D interface 604, and the second unit F interface 619, and stop valves and electromagnetic flowmeters are installed on these water inlet pipelines; the second unit J interface 623 is connected to the intermediate guide tube 301 through a hose; the second unit D interface 617 and the first unit F interface 606 are connected through a hose and the first nitrification liquid reflux pump 403, the stop valve and the electromagnetic flowmeter are arranged therebetween; the second unit I interface 622 and the second unit H interface 621 are connected through a hose and the second nitrification liquid reflux pump 404, the stop valve and the electromagnetic flowmeter are arranged therebetween; the sludge reflux port 306 and the first unit B interface 602 are connected through a hose and the sludge reflux pump 405, the stop valve and the electromagnetic flowmeter are arranged therebetween; dosing Box 5 is connected to the first unit E interface 605 and the second unit G interface 620 respectively through the carbon source dosing pump 402, and stop valves and electromagnetic flow meters are installed on these dosing pipelines; the first reaction tank 101 is used as a pre-anoxic tank, the second reaction tank 102 is used as an anaerobic tank, the third reaction tank 103, the fourth reaction tank 104, the fifth reaction tank 105 and the sixth reaction tank 106 are all used as anoxic tanks; the seventh reaction tank 107 and the eighth reaction tank 108 are used as aerobic tanks; the first reaction tank 101, the second reaction tank 102 are used as anaerobic tanks, and the third reaction tank 103, the fourth reaction tank 104, the fifth reaction tank 105 and the sixth reaction tank 106 are used as anoxic tanks; the seventh reaction tank 107 and the eighth reaction tank 108 are used as aerobic tanks; the first reaction tank 101, the second reaction tank 102 are used as anaerobic tanks; Agitators 10 are respectively provided in the reaction tank 102, the third reaction tank 103, the fourth reaction tank 104, the fifth reaction tank 105, the sixth reaction tank 106, and the anoxic tank 203; aeration devices 8 are respectively provided in the seventh reaction tank 107, the eighth reaction tank 108, the first aerobic tank 201, the second aerobic tank 202, and the third aerobic tank 204, and the aeration devices 8 are connected to the blower 9. Air volume regulating valves are provided on these air supply pipelines to adjust the air volume to ensure the dissolved oxygen content in these reaction tanks.

[0025] The sewage treatment capacity is 10m³ / d. The hydraulic retention time of the first reaction tank 101 is 1.44h; the hydraulic retention time of the second reaction tank 102 is 1.44h; the third reaction tank 103, the fourth reaction tank 104, the fifth reaction tank 105 and the sixth reaction tank 106 constitute an anoxic tank group with a hydraulic retention time of 11.88h; the seventh reaction tank 107, the eighth reaction tank 108, the first aerobic tank 201 and the second aerobic tank 202 constitute an aerobic tank group with a hydraulic retention time of 11.88h; the hydraulic retention time of the anoxic tank 203 is 2.52h; the hydraulic retention time of the third aerobic tank 204 is 2.52h.

[0026] The sewage raw water passes through the sewage inlet pump 401 and enters the first reaction tank 101, the second reaction tank 102, the third reaction tank 103, and the anoxic tank 203 through the first unit A interface 601, the first unit C interface 603, the first unit D interface 604, and the second unit F interface 619. The inflow flow can be adjusted by the stop valve on the inlet pipe. The electromagnetic flowmeter on the inlet pipe records the flow into each reaction tank. This operation can optimize the sewage inlet position and inflow volume. After being treated by the first reaction tank 101, the second reaction tank 102, the anoxic tank group, the aerobic tank group, the anoxic tank 203, the third aerobic tank 204, and the sedimentation tank 3, the sewage raw water flows out from the sewage outlet 305. The process flow is as follows Figure 4 shown.

[0027] The third reaction pool 103, the fourth reaction pool 104, the fifth reaction pool 105 and the sixth reaction pool 106 constitute an anoxic pool group, and the seventh reaction pool 107, the eighth reaction pool 108, the first aerobic pool 201 and the second aerobic pool 202 constitute an aerobic pool group, which can reduce and optimize the hydraulic retention time of the anoxic pool group and the aerobic pool group. The first plug-in plate 130 is inserted between the fourth reaction pool 104 and the fifth reaction pool 105, and the first plug-in plate 130 is inserted between the sixth reaction pool 106 and the seventh reaction pool 107. The first unit I interface 608 is connected to the first unit K interface 610 through a hose, and the sewage flows from the fourth reaction pool 104 into the seventh reaction pool 107, then the hydraulic retention time of the anoxic pool group is 5.94h. Insert the first plug plate 130 between the fifth reaction tank 105 and the sixth reaction tank 106, insert the first plug plate 130 between the sixth reaction tank 106 and the seventh reaction tank 107, connect the first unit J interface 609 with the first unit K interface 610 through a hose, and the sewage flows from the fifth reaction tank 105 into the seventh reaction tank 107, then the hydraulic retention time of the anoxic tank group is 8.91h. Insert the second plug plate between the second aerobic tank 202 and the anoxic tank 203, connect the first unit N interface 613 with the second unit K interface 625 through a hose, and the sewage flows from the eighth reaction tank 108 into the anoxic tank 203, then the hydraulic retention time of the aerobic tank group is 5.94h. Insert the second plug-in plate between the first aerobic tank 201 and the second aerobic tank 202, insert the second plug-in plate between the second aerobic tank 202 and the anoxic tank 203, connect the second unit C interface 616 with the second unit K interface 625 through a hose, and the sewage flows from the first aerobic tank 201 into the anoxic tank 203, then the hydraulic retention time of the aerobic tank group is 8.91h. Insert the second plug-in plate between the second aerobic tank 202 and the anoxic tank 203, connect the second unit E interface 618 with the middle guide tube 301 through a hose, and the sewage flows from the second aerobic tank 202 into the sedimentation tank 3, thereby reducing the hydraulic retention time of the anoxic tank 203 and the third aerobic tank 204.

[0028] The return sludge from the sedimentation tank 3 enters the first reaction tank 101 from the first unit B interface 602 through the sludge return port 306 and the sludge return pump 405. The return sludge amount can be adjusted by the stop valve on the pipeline, and the electromagnetic flowmeter on the pipeline records the return sludge amount. This operation can optimize the sludge return amount.

[0029] The return sewage in the second aerobic tank 202 passes through the second unit D interface 617 and the first nitrifying liquid reflux pump 403 to enter the third reaction tank 103 from the first unit F interface 606; if the sewage is connected to the anoxic tank 203 from the eighth reaction tank 108, the first unit M interface 612 is connected to the first nitrifying liquid reflux pump 403, and the return sewage in the eighth reaction tank 108 passes through the first unit M interface 612 and the first nitrifying liquid reflux pump 403 to enter the third reaction tank 103 from the first unit F interface 606; if the sewage is connected to the anoxic tank 201 from the first aerobic tank 201, the second unit B interface 615 is connected to the first nitrifying liquid reflux pump 403, and the return sewage in the first aerobic tank 201 passes through the second unit B interface 615 and the first nitrifying liquid reflux pump 403 to enter the third reaction tank 103 from the first unit F interface 606. The amount of internal return sewage can be adjusted by the stop valve on the return pipeline, and the electromagnetic flowmeter on the return pipeline records the amount of internal return sewage. This operation can optimize the internal return flow from the aerobic tank group to the third reaction tank 103.

[0030] The reflow sewage in the third aerobic tank 204 passes through the second unit I interface 622 and the second nitrification liquid reflux pump 404 from the second unit H interface 621 into the anoxic tank 203. The amount of the internal reflow sewage can be adjusted by the stop valve on the reflux pipeline. The electromagnetic flowmeter on the reflux pipeline records the amount of the internal reflow sewage. This operation can optimize the internal reflow amount from the third aerobic tank 204 to the anoxic tank 203.

[0031] The carbon source enters the third reaction tank 103 and the anoxic tank 203 through the first unit E interface 605 and the second unit G interface 620 respectively through the dosing box 5 and the carbon source dosing pump 402. The carbon source is regulated by the stop valve on the dosing pipeline, and the electromagnetic flowmeter on the dosing pipeline records the carbon source dosage. This operation can optimize the carbon source dosage and determine the dosing position of the carbon source.

[0032] The remaining sludge in the sedimentation tank 3 is discharged through the sludge outlet 307 , and the sewage is discharged through the sewage outlet 305 .

[0033] The first sampling port 701, the second sampling port 702, and the third sampling port 703 can be used to sample sewage at any location to detect the treatment effect.

[0034] Under this process mode, the test device of the present invention can change the effective volume of the improved five-stage method, and test and optimize the water inlet position and water inlet ratio, hydraulic retention time, sludge return volume, sewage internal return volume and carbon source addition amount.

[0035] (II) Multi-stage and multi-level AO process mode like Figure 5 As shown, all the first plug plates 130 are pulled out, and the second tank body unit 2 is not used; the output end of the sewage inlet pump 401 is respectively connected to the first unit A interface 601, the first unit G interface 607, and the first unit K interface 610, and stop valves and electromagnetic flowmeters are installed on these water inlet pipelines; the first unit N interface 613 is connected to the intermediate guide cylinder 301 through a hose and a stop valve is provided therebetween; the sludge return port 306 is connected to the first unit B interface 602 through a hose and a sludge return pump 405, a stop valve and an electromagnetic flowmeter are provided therebetween; the dosing box 5 is connected to the first unit L interface 611 through the carbon source dosing pump 402, and a stop valve and an electromagnetic flowmeter are installed on the dosing pipeline; The first reaction tank 101 and the second reaction tank 102 are both used as anaerobic tanks, the third reaction tank 103, the sixth reaction tank 106, and the eighth reaction tank 108 are all used as aerobic tanks, and the fourth reaction tank 104, the fifth reaction tank 105, and the seventh reaction tank 107 are all used as anoxic tanks; a stirrer 10 is respectively provided in the first reaction tank 101, the second reaction tank 102, the fourth reaction tank 104, the fifth reaction tank 105, and the seventh reaction tank 107; an aeration device 8 is respectively provided in the third reaction tank 103, the sixth reaction tank 106, and the eighth reaction tank 108, and the aeration device 8 is connected to the blower 9, and air volume regulating valves are provided on these air supply pipelines to adjust the air volume to ensure the dissolved oxygen content in these reaction tanks.

[0036] The sewage treatment capacity is 10m³ / d. The first reaction tank 101 and the second reaction tank 102 form an anaerobic tank group with a hydraulic retention time of 2.88h; the hydraulic retention time of the third reaction tank 103 is 2.97h; the fourth reaction tank 104 and the fifth reaction tank 105 form an anoxic tank group with a hydraulic retention time of 5.94h; the hydraulic retention time of the sixth reaction tank 106 is 2.97h; the hydraulic retention time of the seventh reaction tank 107 is 2.97h; and the hydraulic retention time of the eighth reaction tank 108 is 2.97h.

[0037] After passing through the sewage inlet pump 401, the sewage raw water enters the first reaction tank 101, the fourth reaction tank 104, and the seventh reaction tank 107 respectively through the first unit A interface 601, the first unit G interface 607, and the first unit K interface 610. The inflow flow can be adjusted by the stop valve on the inlet pipe. The electromagnetic flowmeter on the inlet pipe records the flow into each reaction tank. This operation can optimize the sewage inlet position and inflow volume. After being treated by the anaerobic tank group, the third reaction tank 103, the anoxic tank group, the sixth reaction tank 106, the seventh reaction tank 107, the eighth reaction tank 108, and the sedimentation tank 3, the sewage raw water flows out from the sewage outlet 305. The process flow is as follows Figure 6 shown.

[0038] The optimum hydraulic retention time is tested by adjusting the amount of sewage entering the test device of the present invention.

[0039] The return sludge from the sedimentation tank 3 enters the first reaction tank 101 from the first unit B interface 602 through the sludge return port 306 and the sludge return pump 405. The return sludge amount can be adjusted by the stop valve on the pipeline, and the electromagnetic flowmeter on the pipeline records the return sludge amount. This operation can optimize the sludge return amount.

[0040] The carbon source enters the seventh reaction tank 107 through the first unit L interface 611 via the dosing box 5 and the carbon source dosing pump 402. The carbon source is regulated by the stop valve on the dosing pipeline, and the electromagnetic flowmeter on the dosing pipeline records the carbon source dosage. This operation can optimize the carbon source dosage.

[0041] The remaining sludge in the sedimentation tank 3 is discharged through the sludge outlet 307 , and the sewage is discharged through the sewage outlet 305 .

[0042] The first sampling port 701 and the third sampling port 703 can sample sewage at any location to detect the treatment effect.

[0043] In this process mode, the test device of the present invention can test and optimize the multi-stage and multi-level water inlet positions and water inlet ratios, hydraulic retention time, sludge return flow, and carbon source dosage.

[0044] (III) MBBR process (moving bed biofilm reactor process) model like Figure 7As shown, an interception net 140 is installed at the first connecting port 120 between the first reaction tank 101 and the second reaction tank 102, the first connecting port 120 between the second reaction tank 102 and the third reaction tank 103, and the first connecting port 120 between the third reaction tank 103 and the fourth reaction tank 104, and the aperture of the interception net 140 is 15 mm; a first plug plate 130 is installed at the first connecting port 120 between the fourth reaction tank 104 and the fifth reaction tank 105, and the fifth reaction tank 105, the sixth reaction tank 106, the seventh reaction tank 107, the eighth reaction tank 108, the first aerobic tank 201, the second aerobic tank 202, the anoxic tank 203, and the third aerobic tank 204 are not used; the output end of the sewage inlet pump 401 is respectively connected to the first unit A interface 601, the first unit C interface 603, and the first unit D interface 604, and stop valves and electromagnetic flowmeters are installed on these water inlet pipes; the first unit I interface 608 is connected to the middle guide tube 3 01 are connected by a hose; the first unit H interface 630 is connected to the first unit F interface 606 by a hose, and a first nitrification liquid reflux pump 403, a stop valve and an electromagnetic flowmeter are provided therebetween; the sludge reflux port 306 is connected to the first unit B interface 602 by a hose, and a sludge reflux pump 405, a stop valve and an electromagnetic flowmeter are provided therebetween; the dosing box 5 is connected to the first unit E interface 605 by a carbon source dosing pump 402, and a stop valve and an electromagnetic flowmeter are installed on the dosing pipeline flow meter; the first reaction tank 101 is used as a pre-anoxic tank, the second reaction tank 102 is used as an anaerobic tank, the third reaction tank 103 is used as an anoxic tank, and the fourth reaction tank 104 is used as an aerobic tank; a stirrer 10 is respectively provided in the first reaction tank 101, the second reaction tank 102, and the third reaction tank 103; an aeration device 8 is provided in the fourth reaction tank 104, the aeration device 8 is connected to a blower 9, and an air volume regulating valve is provided on the air supply pipeline to adjust the air volume to ensure the dissolved oxygen content in the reaction tank.

[0045] The sewage treatment capacity is 10m³ / d. The hydraulic retention time of the first reaction tank 101 is 1.44h; the hydraulic retention time of the second reaction tank 102 is 1.44h; the hydraulic retention time of the third reaction tank 103 is 2.97h; and the hydraulic retention time of the fourth reaction tank 104 is 2.97h.

[0046] The first reaction tank 101, the second reaction tank 102, the third reaction tank 103, and the fourth reaction tank 104 are all filled with fillers (high-density polyethylene suspended carrier fillers), the filler nitrification rate is 0.5g N / (㎡.d), and the organic matter oxidation rate is 10g COD / (㎡.d).

[0047] After passing through the sewage inlet pump 401, the sewage raw water enters the first reaction tank 101, the second reaction tank 102, and the third reaction tank 103 respectively through the first unit A interface 601, the first unit C interface 603, and the first unit D interface 604. The inflow flow can be adjusted by the stop valve on the inlet pipeline. The electromagnetic flowmeter on the inlet pipeline records the flow into each reaction tank. This operation can optimize the sewage inlet position and inflow volume. After being treated in the first reaction tank 101, the second reaction tank 102, the third reaction tank 103, the fourth reaction tank 104, and the sedimentation tank 3, the sewage raw water flows out from the sewage outlet 305. The process flow is as follows Figure 8 shown.

[0048] The optimum filler load is determined by adjusting the amount of sewage entering the test device of the present invention.

[0049] The return sludge from the sedimentation tank 3 enters the first reaction tank 101 from the first unit B interface 602 through the sludge return port 306 and the sludge return pump 405. The return sludge amount can be adjusted by the stop valve on the pipeline, and the electromagnetic flowmeter on the pipeline records the return sludge amount. This operation can optimize the sludge return amount.

[0050] The reflux wastewater in the fourth reaction tank 104 enters the third reaction tank 103 from the first unit F interface 606 through the first unit H interface 630 and the first nitrification liquid reflux pump 403. The amount of the internal reflux wastewater can be adjusted by the stop valve on the reflux pipeline, and the electromagnetic flowmeter on the reflux pipeline records the amount of the internal reflux wastewater. This operation can optimize the internal reflux amount from the fourth reaction tank 104 to the third reaction tank 103.

[0051] The carbon source enters the third reaction tank 103 through the first unit E interface 605 via the dosing box 5 and the carbon source dosing pump 402. The carbon source is regulated by the stop valve on the dosing pipeline, and the electromagnetic flowmeter on the dosing pipeline records the carbon source dosage. This operation can optimize the carbon source dosage.

[0052] The remaining sludge in the sedimentation tank 3 is discharged through the sludge outlet 307 , and the sewage is discharged through the sewage outlet 305 .

[0053] The first sampling port 701 and the third sampling port 703 can sample sewage at any location to detect the treatment effect.

[0054] Under this process mode, the test device of the present invention can test and optimize the water inlet position and water inlet ratio, filler load, sludge return flow, sewage internal return flow, and carbon source dosage of the MBBR process.

[0055] The present invention can realize convenient switching of the improved five-stage process, the multi-stage multi-stage AO process and the MBBR process, and can test and optimize the water inlet position and water inlet ratio, hydraulic retention time, sludge external return volume, sewage internal return volume, carbon source addition position and addition amount, and filler load under each process mode. The test device of the present invention has a simple structure, rich functions, low cost, and flexible process adjustment method. Before large-scale design, the effect and feasibility of the treatment process can be preliminarily evaluated through this test device, and the optimal design parameters can be determined. It has extremely high application value in the field of sewage treatment design.

Claims

1. A sewage biological treatment test device, characterized in that: The invention comprises a plurality of reaction pools and a sedimentation pool (3) which are connected in sequence. The plurality of reaction pools are, in sequence, a first reaction pool (101), a second reaction pool (102), a third reaction pool (103), a fourth reaction pool (104), a fifth reaction pool (105), a sixth reaction pool (106), a seventh reaction pool (107), an eighth reaction pool (108), a first aerobic pool (201), a second aerobic pool (202), an anoxic pool (203), and a third aerobic pool (204). Adjacent reaction pools can be connected or disconnected. An interface is provided on the reaction pool, and a valve is provided on the interface. By installing a hose on the interface, the reaction pools are connected to each other and the reaction pools are connected to the sedimentation pool (3), thereby forming different process modes.

2. A sewage biological treatment test device according to claim 1, characterized in that: The first reaction pool (101), the second reaction pool (102), the third reaction pool (103), the fourth reaction pool (104), the fifth reaction pool (105), the sixth reaction pool (106), the seventh reaction pool (107), and the eighth reaction pool (108) are designed as a whole to form a first pool body unit (1). The first pool body unit (1) is divided into the above-mentioned reaction pools by a plurality of first partitions (110). The first partitions (110) are provided with first connecting ports (120) for connecting adjacent reaction pools. A first plug plate (130) is detachably connected to a communication port (120); the first aerobic pool (201), the second aerobic pool (202), the anoxic pool (203), and the third aerobic pool (204) are designed as an integrated whole to form a second pool body unit (2); the second pool body unit (2) is divided into the above-mentioned reaction pools by a plurality of second partitions (210); a second communication port (220) is provided on the second partition (210) for connecting adjacent reaction pools; and a second plug plate is detachably connected to the second communication port (220).

3. A sewage biological treatment test device according to claim 2, characterized in that: The interfaces are specifically arranged as follows: the first reaction pool (101) is provided with a first unit A interface (601) and a first unit B interface (602); the second reaction pool (102) is provided with a first unit C interface (603); the third reaction pool (103) is provided with a first unit D interface (604), a first unit E interface (605) and a first unit F interface (606); the fourth reaction pool (104) is provided with a first unit G interface (607), a first unit H interface (630) and a first unit I interface (608); the fifth reaction pool (105) is provided with a first unit J interface (609); the seventh reaction pool (107) is provided with a first unit K interface (610) and a first unit L interface (611); The eighth reaction tank (108) is provided with a first unit M interface (612) and a first unit N interface (613); the first aerobic tank (201) is provided with a second unit A interface (614), a second unit B interface (615) and a second unit C interface (616); the second aerobic tank (202) is provided with a second unit D interface (617) and a second unit E interface (618); the anoxic tank (203) is provided with a second unit F interface (619), a second unit G interface (620), a second unit H interface (621) and a second unit K interface (625); and the third aerobic tank (204) is provided with a second unit I interface (622) and a second unit J interface (623).

4. A sewage biological treatment test device according to claim 3, characterized in that: The sedimentation tank (3) is a vertical flow sedimentation tank. An intermediate guide tube (301) is provided at the upper part of the sedimentation tank (3). The sedimentation tank (3) is provided with a sewage outlet (305), a sludge return outlet (306) and a sludge outlet (307).

5. A sewage biological treatment test device according to claim 4, characterized in that: The sedimentation tanks (3) are provided with two or more than two, and the sedimentation tanks (3) are connected in parallel.

6. A sewage biological treatment test device according to any one of claims 2 to 5, characterized in that: Each reaction pool of the first pool body unit (1) is provided with a first sampling port (701), each reaction pool of the second pool body unit (2) is provided with a second sampling port (702), the sedimentation pool (3) is provided with a third sampling port (703), and valves are provided on the first sampling port (701), the second sampling port (702) and the third sampling port (703).

7. A method for using the sewage biological treatment test device according to claim 4, characterized in that: Different process modes are formed according to the different connection modes between the reaction tanks and between the reaction tanks and the sedimentation tank (3). The specific process modes and their connection modes are as follows: A. Five-stage process mode: All first plug plates (130) and second plug plates are withdrawn, and the first unit N interface (613) is connected to the second unit A interface (614); the output end of the sewage inlet pump (401) is respectively connected to the first unit A interface (601), the first unit C interface (603), the first unit D interface (604), and the second unit F interface (619); the second unit J interface (623) is connected to the middle guide tube (301); the second unit D interface (617) is connected to the first unit F interface (606) and a first nitrification liquid reflux pump (403) is provided therebetween; the second unit I interface (622) is connected to the second unit H interface (621) are connected and a second nitrification liquid return pump (404) is provided therebetween; the sludge return port (306) is connected to the first unit B interface (602) and a sludge return pump (405) is provided therebetween; the drug adding box (5) is respectively connected to the first unit E interface (605) and the second unit G interface (620) via a carbon source adding pump (402); the first reaction tank (101) is used as a pre-anoxic tank, the second reaction tank (102) is used as an anaerobic tank, the third reaction tank (103), the fourth reaction tank (104), the fifth reaction tank (105) and the sixth reaction tank (106) are all used as anoxic tanks; the seventh reaction tank (107) and the eighth reaction tank (108) are used as aerobic tanks; B. Multi-stage multi-level AO process mode: all first plug plates (130) are withdrawn, and the second tank body unit (2) is not used; the output end of the sewage inlet pump (401) is respectively connected to the first unit A interface (601), the first unit G interface (607), and the first unit K interface (610); the first unit N interface (613) is connected to the intermediate guide tube (301); the sludge return port (306) is connected to the first unit B interface (602), and a sludge return pump (405) is provided therebetween; the dosing box (5) is connected to the first unit L interface (611) via the carbon source dosing pump (402); the first reaction tank (101) and the second reaction tank (102) are both used as anaerobic tanks, the third reaction tank (103), the sixth reaction tank (106), and the eighth reaction tank (108) are both used as aerobic tanks, and the fourth reaction tank (104), the fifth reaction tank (105), and the seventh reaction tank (107) are all used as anoxic tanks; C. MBBR process mode: interception nets (140) are installed at the first connecting port (120) between the first reaction tank (101) and the second reaction tank (102), at the first connecting port (120) between the second reaction tank (102) and the third reaction tank (103), and at the first connecting port (120) between the third reaction tank (103) and the fourth reaction tank (104); a first plug plate (130) is installed at the first connecting port (120) between the fourth reaction tank (104) and the fifth reaction tank (105); the fifth reaction tank (105), the sixth reaction tank (106), the seventh reaction tank (107), the eighth reaction tank (108), the first aerobic tank (201), the second aerobic tank (202), the anoxic tank (203), and the third aerobic tank (204) are not used; sewage inlet The output end of the water pump (401) is respectively connected to the first unit A interface (601), the first unit C interface (603), and the first unit D interface (604); the first unit I interface (608) is connected to the middle guide tube (301); the first unit H interface (630) is connected to the first unit F interface (606), and a first nitrification liquid reflux pump (403) is provided therebetween; the sludge reflux port (306) is connected to the first unit B interface (602), and a sludge reflux pump (405) is provided therebetween; the drug adding box (5) is connected to the first unit E interface (605) via the carbon source adding pump (402); the first reaction tank (101) is used as a pre-anoxic tank, the second reaction tank (102) is used as an anaerobic tank, the third reaction tank (103) is used as an anoxic tank, and the fourth reaction tank (104) is used as an aerobic tank.

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