CN209940765U - A sewage treatment system with COD detection - Google Patents

Abstract

The utility model discloses a sewage treatment system with COD detection, which comprises a water collecting tank, a first pH adjusting tank, a flocculation reaction tank, a first sedimentation tank, a fiber ball filter, an anaerobic tank and a facultative oxygen tank which are connected in sequence by pipelines , aerobic tank, second sedimentation tank, MBR membrane filter tank, disinfection tank and reuse tank, an oil-water separation tank is arranged between the collection tank and the first pH adjustment tank, the upper part of the oil-water separation tank is provided with an inclined net, and the oil-water separation tank There is an oil discharge pipe on the upper side of the oil-water separation tank, a collection tank corresponding to the outlet of the inclined net is installed on the inlet side of the oil-water separation tank, a COD detector is installed on the outlet pipeline of the aerobic tank, and the outlet pipeline of the aerobic tank passes through the COD detector. It is divided into two paths, one is connected to the second sedimentation tank, and the other is returned to the anaerobic tank through the return pipeline, the return valve and the return pump. The utility model can effectively reduce the introduction of invalid sludge, reduce the load of subsequent pollution treatment; can prevent the COD index from being discharged outside the standard, and reduce the secondary pollution of the water body.

Description

A sewage treatment system with COD detection

technical field

The utility model relates to the technical field of sewage treatment, in particular to a sewage treatment system with COD detection.

Background technique

Sewage, usually refers to the effluent from living and production that is polluted to a certain extent. The sewage mainly includes domestic sewage, industrial sewage and initial rainwater. The main pollutants in sewage are pathogen pollutants, oxygen-consuming pollutants, plant nutrients and toxic pollutants. Sewage treatment: The process of purifying sewage in order to make it meet the quality requirements of a water body for drainage or reuse. Sewage treatment is widely used in construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering and other fields, and is increasingly entering the daily life of ordinary people.

For the current sewage treatment, there are the following problems: 1. The efficiency of sewage treatment is low, and the treatment effect is not ideal; 2. The COD discharged after treatment does not meet the standard and is discharged outside; 3. During the treatment process The waste water produced by the filter press is easy to cause secondary pollution, which causes greater pollution to the environment and makes it impossible to realize the recycling and reuse of industrial water. Therefore, in order to improve the treatment effect and further improve the existing technology, To realize the reuse of treated sewage, it is necessary to design a sewage treatment system with COD detection.

Utility model content

The technical problem solved by the present invention is to provide a sewage treatment system with COD detection, so as to solve the shortcomings of the above-mentioned background technology.

The technical problem solved by the utility model adopts the following technical solutions to realize:

A sewage treatment system with COD detection, comprising a collection tank, a first pH adjustment tank, a flocculation reaction tank, a first sedimentation tank, a fiber ball filter, an anaerobic tank, a facultative aerobic tank, an aerobic tank, and a second sedimentation tank , MBR membrane filter tank, disinfection tank and reuse tank, an oil-water separation tank is arranged between the collecting tank and the first pH adjustment tank, the upper part of the oil-water separation tank is provided with an inclined mesh, and the upper side of the oil-water separation tank is provided with an oil drain pipe. The inlet side of the oil-water separation tank is provided with a collection tank corresponding to the outlet of the inclined mesh. The outlet of the oil-water separation tank is connected to the inlet of the first pH adjustment tank through a pump. A chemical mixer, the outlet of the first pH adjustment tank is connected with the inlet of the flocculation reaction tank, the pipeline connecting the first pH adjustment tank and the flocculation reaction tank is provided with a second drug addition mixer, and the outlet of the flocculation reaction tank is connected with the first sedimentation tank The inlet of the tank is connected, the outlet of the first sedimentation tank is connected with the water inlet of the fiber ball filter through the liquid inlet pump and the liquid inlet valve, and the water outlet of the fiber ball filter is connected with the inlet of the anaerobic tank through the drain valve. The outlet of the pool is connected with the inlet of the facultative oxygen pool, the outlet of the facultative oxygen pool is connected with the aerobic pool, the aeration pipe is arranged in the aerobic pool, the aeration pipe is connected with the blower, the outlet of the aerobic pool is connected with the inlet of the second sedimentation tank, The outlet of the second sedimentation tank is connected to the inlet of the MBR membrane filter tank. The MBR membrane filter tank is equipped with a flat membrane filter. The outlet of the MBR membrane filter tank is connected to the reuse tank through the disinfection tank. The disinfection tank is equipped with ultraviolet germicidal lamps. The outlet pipeline of the aerobic tank is provided with a COD detector. The outlet pipeline of the aerobic tank is divided into two channels after passing through the COD detector. back to the anaerobic tank.

Further, it also includes a sludge treatment system. The sludge treatment system includes a filter press, a sludge tank, a sludge pump and a sludge main pipe, the sewage outlet of the first pH adjustment tank, the sewage outlet of the flocculation reaction tank, and the first sedimentation tank. The sewage outlet of the second sedimentation tank and the sewage outlet of the MBR membrane filter tank are respectively connected with the sludge main pipe through the sludge branch pipe and the sewage valve, and the outlet of the sludge main pipe is connected with the inlet of the sludge tank through the sludge pump. The outlet of the sludge tank is pumped to the filter press by the pump.

Further, the filtrate outlet of the filter press is connected to the inlet of the sludge tank through a pipeline.

Further, the supernatant of the sludge tank is connected to the sump through a pipeline.

The beneficial effects of the utility model are:

1. By setting the inclined net, it can play the role of preliminary interception and reduce the introduction of invalid sludge.

2. By setting the oil-water separation tank, the oil pollution can be removed and the load of subsequent pollution treatment can be reduced;

3. A COD detector and a return pipeline are set on the outlet pipeline of the aerobic tank to prevent the COD index from being discharged outside the standard.

4. After the sludge in the first pH adjustment tank, the flocculation reaction tank, the first sedimentation tank, the second sedimentation tank and the MBR membrane filter tank is filtered by the filter press, the filtrate is returned to the sludge tank, and the supernatant of the sludge tank The filter cake is returned to the sump through the pipeline, and the filter cake is transported out, which reduces the secondary pollution of the water body.

Description of drawings

Fig. 1 is the structural representation of the preferred embodiment of the present utility model;

In the figure, the collection tank 1, the inclined net 2, the collection tank 3, the oil-water separation tank 4, the oil discharge pipe 41, the first pH adjustment tank 5, the flocculation reaction tank 6, the first sedimentation tank 7, the fiber ball filter 8, the COD detection Instrument 9, anaerobic tank 10, facultative oxygen tank 11, aerobic tank 12, second sedimentation tank 13, MBR membrane filter tank 14, disinfection tank 15, reuse tank 16, filter press 17, sludge tank 18, blower 19. Sewage pump 100, pump 101, sludge pump 102, feed pump 103, return pump 104, flat membrane filter 140, first dosing mixer 200, second dosing mixer 201, blowdown valve 300, feed Liquid valve 301 , return valve 302 , liquid outlet valve 303 , return pipe 400 , sludge main pipe 500 .

Detailed ways

In order to make it easy to understand the technical means, creation features, achievement goals and effects realized by the present invention, the present invention will be further described below with reference to the specific figures.

Embodiment 1, referring to a sewage treatment system with COD detection shown in FIG. 1, including a water collection tank 1, a first pH adjustment tank 5, a flocculation reaction tank 6, a first sedimentation tank 7, a fiber ball filter 8, a Oxygen tank 10, facultative oxygen tank 11, aerobic tank 12, second sedimentation tank 13, MBR membrane filter tank 14, disinfection tank 15 and reuse tank 16, there is oil and water between the water collection tank 1 and the first pH adjustment tank 5 Separation pool 4, the upper part of the oil-water separation pool 4 is provided with an inclined net 2, the upper side of the oil-water separation pool 4 is provided with an oil discharge pipe 41, and the inlet side of the oil-water separation pool 4 is provided with a collection pool 3 corresponding to the outlet of the inclined net 2, and the oil-water separation pool 4 is provided with a collection pool 3 corresponding to the outlet of the inclined net 2. The outlet of the separation tank 4 is connected to the inlet of the first pH adjustment tank 5 through the pump 101. The pipeline connecting the oil-water separation tank 4 and the first pH adjustment tank 5 is provided with a first dosing mixer 200. The outlet is connected to the inlet of the flocculation reaction tank 6, the pipeline connecting the first pH adjustment tank 5 and the flocculation reaction tank 6 is provided with a second dosing mixer 201, and the outlet of the flocculation reaction tank 6 is connected to the inlet of the first sedimentation tank 7 , the outlet of the first sedimentation tank 7 is connected with the water inlet of the fiber ball filter 8 through the liquid inlet pump 103 and the liquid inlet valve 301, and the water outlet of the fiber ball filter 8 is connected with the inlet of the anaerobic tank 10 through the drain valve 303. , the outlet of the anaerobic tank 10 is connected with the inlet of the anaerobic tank 11, the outlet of the anaerobic tank 11 is connected with the aerobic tank 12, the aeration pipe is provided in the aerobic tank 12, the aeration pipe is connected with the blower 19, and the aerobic tank The outlet of 12 is connected with the inlet of the second sedimentation tank 13, the outlet of the second sedimentation tank 13 is connected with the inlet of the MBR membrane filter tank 14, the MBR membrane filter tank 14 is provided with a flat membrane filter 140, and the outlet of the MBR membrane filter tank 14 The disinfection tank 15 is connected to the reuse water tank 16, and the disinfection tank 15 is provided with an ultraviolet germicidal lamp. The outlet pipeline of the aerobic tank 12 is provided with a COD detector 9, and the outlet pipeline of the aerobic tank 12 passes through the COD detector. After 9, it is divided into two paths, one is connected to the second sedimentation tank 13, and the other is returned to the anaerobic tank 10 through the return pipeline 400, the return valve 302 and the return pump 104.

Further, it also includes a sludge treatment system. The sludge treatment system includes a filter press 17, a sludge tank 18, a sludge pump 102, a sludge main pipe 500, a sewage outlet of the first pH adjustment tank 5, and a sewage discharge of the flocculation reaction tank 6. The sewage outlet, the sewage outlet of the first sedimentation tank 7, the sewage outlet of the second sedimentation tank 13 and the sewage outlet of the MBR membrane filter tank 14 are respectively connected with the sludge main pipe 500 through the sludge branch pipe and the sewage valve 300, and the outlet of the sludge main pipe 500 The sludge pump 102 is connected to the inlet of the sludge tank 18, and the outlet of the sludge tank 18 is pumped to the filter press 17 through the pump.

Further, the filtrate outlet of the filter press 17 is connected to the inlet of the sludge tank 18 through a pipeline.

Further, the supernatant of the sludge tank 18 is connected to the sump 1 through a pipeline.

The sewage treatment process of the present utility model is as follows:

After passing through the grille, the sewage flows into the collecting tank 1, and the sewage is lifted to the water tank at the upper end of the inclined net 2 through the sewage pump 100, and then flows laterally to the inclined net from the water tank. Playing the role of preliminary interception, the sewage falls into the oil-water separation tank 3 through the mesh of the inclined net 2, the oil-water separation tank further separates the oil and water, and the oil is discharged to the oil-stain collection bucket through the oil discharge pipe 41 for collection, and the sewage is collected. Entering the first pH adjustment tank 5 through the pump 101 can enter the first pH adjustment tank 5 after dosing and mixing in the first dosing mixer 200, which plays the role of adjusting the pH value. The sewage enters the flocculation reaction tank 6. Coagulants (PAC, PAM) are added in the second dosing mixer 201. Under the action of the coagulants (PAC, PAM), the colloids and fine suspended solids in the sewage are agglomerated into flocs, which are separated, and then the sewage enters the first A sedimentation tank 7 sediments, and the precipitation supernatant enters the fiber ball filter 8 to remove suspended solids in the sewage; the sewage filtered by the fiber ball filter 8 enters the anaerobic tank 10, the facultative tank 11, the aerobic tank During this period, the biochemical reaction of the tank 12 can effectively denitrify, destroy the structure of organic matter, and achieve the purpose of reducing COD. After the detector 9 passes the test, the sewage can be further introduced into the second sedimentation tank 13. If it is unqualified, it can be returned to the anaerobic tank 10 through the return pipe 400, the return valve 302 and the return pump 104, and the supernatant of the second sedimentation tank 13 enters. The MBR membrane filter tank 14 is filtered, and the flat membrane filter 140 can effectively intercept and filter the refractory organic matter and impurities, and further purify the water quality. The water passes through the MBR membrane filter tank 14 and passes through the disinfection tank 15. The filtrate can be connected to the sludge main pipe 500 through the sludge branch pipe and the sewage valve 300. After being filtered by the filter press, the filtrate is returned to the sludge tank. 18. The supernatant of the sludge tank 18 is returned to the collection tank 1 through the pipeline, and the filter cake is transported out, which can effectively reduce the secondary pollution of the water body.

The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention There will also be various changes and improvements in the new model, which all fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (4)

1. The utility model provides a take sewage treatment system of COD detection, including catch basin (1), first pH equalizing basin (5), flocculation reaction pond (6), first sedimentation tank (7), fibre ball filter (8), anaerobism pond (10), facultative tank (11), good oxygen pond (12), second sedimentation tank (13), MBR membrane filtration pond (14), disinfection pond (15) and reuse water pond (16), a serial communication port, be equipped with oil water separating tank (4) between catch basin (1) and first pH equalizing basin (5), the upper portion of oil water separating tank (4) is equipped with inclined wire netting (2), upper portion one side of oil water separating tank (4) is equipped with oil drain pipe (41), the import side of oil water separating tank (4) is equipped with collection pond (3) that correspond inclined wire netting (2) export, the export of oil water separating tank (4) is through pump (101) and first pH equalizing basin (5) access connection, be equipped with first blender on the pipeline that oil water separating tank (4) and first pH equalizing basin (5) are connected (200) The outlet of the first pH adjusting tank (5) is connected with the inlet of the flocculation reaction tank (6), a second medicine adding mixer (201) is arranged on a pipeline connecting the first pH adjusting tank (5) and the flocculation reaction tank (6), the outlet of the flocculation reaction tank (6) is connected with the inlet of the first sedimentation tank (7), the outlet of the first sedimentation tank (7) is connected with the water inlet of the fiber ball filter (8) through a liquid inlet pump (103) and a liquid inlet valve (301), the water outlet of the fiber ball filter (8) is connected with the inlet of the anaerobic tank (10) through a liquid outlet valve (303), the outlet of the anaerobic tank (10) is connected with the inlet of the facultative tank (11), the outlet of the facultative tank (11) is connected with the aerobic tank (12), an aeration pipe is arranged in the aerobic tank (12), the aeration pipe is connected with an air blower (19), the outlet of the aerobic tank (12) is connected with the inlet of the second sedimentation tank (13), the export of second sedimentation tank (13) and the access connection of MBR membrane filtration pond (14), be equipped with dull and stereotyped membrane filter (140) in MBR membrane filtration pond (14), the export of MBR membrane filtration pond (14) is connected with reuse pond (16) through disinfection pond (15), is equipped with sterilamp in disinfection pond (15), be equipped with COD detector (9) on the outlet pipeline of good oxygen pond (12), the outlet pipe way of good oxygen pond (12) is divided into two the tunnel after COD detector (9), is connected with second sedimentation tank (13) all the way, and another way is through backflow pipeline (400), reflux valve (302) and backwash pump (104) backward flow to anaerobism pond (10).

2. The sewage treatment system with the COD detection function according to claim 1, further comprising a sludge treatment system, wherein the sludge treatment system comprises a filter press (17), a sludge tank (18), a sludge pump (102) and a sludge main pipe (500), a sewage discharge port of the first pH adjusting tank (5), a sewage discharge port of the flocculation reaction tank (6), a sewage discharge port of the first sedimentation tank (7), a sewage discharge port of the second sedimentation tank (13) and a sewage discharge port of the MBR membrane filtration tank (14) are respectively connected with the sludge main pipe (500) through sludge branch pipes and a sewage discharge valve (300), an outlet of the sludge main pipe (500) is connected with an inlet of the sludge tank (18) through the sludge pump (102), and an outlet of the sludge tank (18) is pumped to the filter press (17) through the pump.

3. The sewage treatment system with COD detection according to claim 2, wherein the filtrate outlet of the filter press (17) is connected with the inlet of the sludge tank (18) through a pipeline.

4. The sewage treatment system with COD detection according to claim 2, wherein the supernatant of the sludge tank (18) is connected with the water collecting tank (1) through a pipeline.

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