CN216639207U - Contain heterocyclic compound pesticide effluent treatment plant - Google Patents

Contain heterocyclic compound pesticide effluent treatment plant Download PDF

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Publication number
CN216639207U
CN216639207U CN202122988118.8U CN202122988118U CN216639207U CN 216639207 U CN216639207 U CN 216639207U CN 202122988118 U CN202122988118 U CN 202122988118U CN 216639207 U CN216639207 U CN 216639207U
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treatment unit
wastewater
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outlet
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夏娇
王帅
高峰
纪东升
杜利民
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Jiangsu Lason Chemical Environmental Protection Co ltd
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Jiangsu Lason Chemical Environmental Protection Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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    • Y02W10/10—Biological treatment of water, waste water, or sewage

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Abstract

The utility model discloses a treatment device for heterocyclic compound-containing pesticide wastewater, which is sequentially connected with: the device comprises a wastewater collecting tank, a biochemical distribution tank, an SBR treatment unit, an anaerobic treatment unit, an aerobic treatment unit and a deep oxidation unit. The utility model also discloses a method for treating pesticide wastewater containing heterocyclic compounds by using the device, wherein the SBR treatment unit, the anaerobic treatment unit and the aerobic treatment unit all adopt composite bacteria as strains to carry out biodegradation on organic pollutants in the wastewater, and the deep oxidation stage adopts ozone-hydrogen peroxide for combined oxidation without using a catalyst, so that no secondary pollutants are generated in the oxidation process. The method has the characteristics of simple and convenient operation, lower cost and strong adaptability to the water quality change of the pesticide wastewater containing the heterocyclic compound, and can reduce the COD value of the pesticide wastewater containing the heterocyclic compound, so that the treated wastewater reaches the first-level discharge standard in the integrated wastewater discharge standard.

Description

Contain heterocyclic compound pesticide effluent treatment plant
Technical Field
The utility model relates to the technical field of industrial wastewater treatment, in particular to a treatment device for heterocyclic compound-containing pesticide wastewater.
Background
The treatment of the wastewater from the production of heterocyclic pesticides is one of the major difficulties in the current chemical industry environmental protection. The heterocyclic pesticide has long synthesis steps, complicated intermediate and stable molecular structure, so that the wastewater has very complicated components and contains a large amount of toxic and difficultly-degradable organic compounds and CN-、Cl-、SO4 2-And the like. The heterocyclic pesticide-containing wastewater has the characteristics of high COD, high ammonia nitrogen, high salt and high chroma, and has the three-induced effects of carcinogenesis, teratogenicity and mutagenesis, thereby causing serious threat to an ecosystem.
The prior method for treating pesticide wastewater containing heterocyclic compounds is a combined process of physicochemical pretreatment, biochemical treatment and terminal oxidation treatment. The recent patent (publication number is CN 111268872A) discloses a pesticide wastewater treatment process and a treatment device thereof, which adopts Fendon oxidation to carry out physicochemical pretreatment and then biochemical treatment on pesticide wastewater, and the device consumes a large amount of oxidant and catalyst and generates a large amount of sludge, thus causing higher operation cost. Meanwhile, the advanced oxidation treatment method adopted at the tail end of the device is ozone catalytic oxidation, hydroxyl radicals generated on the surface of the catalyst by ozone are used for oxidizing organic matters in water, the method has a good effect, and a large amount of catalysts are used, so that the cost is high.
SUMMERY OF THE UTILITY MODEL
The device can directly carry out biochemical treatment on heterocyclic pesticide wastewater, and then utilizes an ozone-hydrogen peroxide combined oxidation technology to treat residual organic matters in the wastewater under the condition of no catalyst, so that the treated wastewater reaches the first-level discharge standard in the integrated wastewater discharge standard, and the problems in the prior art are solved.
The utility model is realized by the following steps:
a device for treating pesticide wastewater containing heterocyclic compounds comprises a wastewater collecting unit, a biochemical water distribution unit, an SBR (sequencing batch reactor) treatment unit, an anaerobic treatment unit, an aerobic treatment unit, an MBR (membrane bioreactor) membrane treatment equipment tank, a regulating tank and a deep oxidation unit which are sequentially connected in series; the waste water collecting unit is provided with a waste water collecting unit outlet; according to the direction of wastewater treatment, the front and the back of the biochemical water distribution unit are respectively provided with a biochemical water distribution unit inlet and a biochemical water distribution unit outlet; the SBR processing unit is provided with 2-4 galleries, and an SBR processing unit inlet and an SBR processing unit outlet are arranged at the front and the back of each gallery; the front and the back of the anaerobic treatment unit are respectively provided with an anaerobic treatment unit inlet and an anaerobic treatment unit outlet; the front end of the aerobic treatment unit is provided with an aerobic treatment unit inlet, the rear end of the aerobic treatment unit inlet is provided with an MBR membrane treatment equipment tank, and the MBR membrane treatment equipment tank is provided with an aerobic treatment unit outlet; the front end of the regulating tank is provided with a regulating tank inlet, the rear end of the regulating tank is provided with a regulating tank outlet, and the outlet of the aerobic treatment unit is communicated with the regulating tank inlet; the front end of the deep oxidation unit is provided with a deep oxidation unit inlet, and the rear end of the deep oxidation unit is provided with a deep oxidation unit outlet. The use method of the device comprises the following steps:
the method comprises the following steps: pumping the wastewater from the wastewater collection tank into a biochemical water distribution unit, and adjusting the pH of the wastewater to 7-8 in the biochemical water distribution unit by adopting sulfuric acid or liquid alkali; step two: pumping the wastewater obtained in the step one into one gallery of the SBR treatment unit by adopting a sequencing batch water inlet mode, and enabling all the galleries to alternately operate according to water inlet, aeration, standing and drainage, wherein the retention time of each batch is 24-36 h; step three: pumping the wastewater obtained in the step two into an anaerobic treatment unit, wherein the hydraulic retention time is 24-36 h; step four: the wastewater obtained in the step three automatically flows into an aerobic treatment unit, and the hydraulic retention time is 24-36 h; step five: enabling the wastewater obtained in the step four to automatically flow into an MBR membrane treatment equipment pool, and enabling the hydraulic retention time to be 4-12 h; step six: enabling the wastewater obtained in the fifth step to enter an adjusting tank, and adjusting the pH of the wastewater obtained in the fifth step to 8-10 by adopting liquid alkali in the adjusting tank; step seven: pumping the wastewater obtained in the sixth step into AOP oxidation equipment, and keeping the hydraulic retention time for 0.5-2 h.
Further, the connection relationship of the processing device is as follows: the outlet of the wastewater collection tank is connected with the inlet of the biochemical water distribution unit, the outlet of the biochemical water distribution unit is connected with the inlet of the SBR treatment unit, the outlet of the SBR treatment unit is connected with the inlet of the anaerobic treatment unit, the outlet of the anaerobic treatment unit is connected with the inlet of the aerobic treatment unit, the outlet of the aerobic treatment unit is connected with the inlet of the regulating tank, and the outlet of the regulating tank is connected with the inlet of the deep oxidation unit.
Further, the SBR treatment unit, the anaerobic treatment unit and the aerobic treatment unit all use 100-200 meshes of powdered activated carbon as carriers to immobilize composite strains consisting of alcaligenes faecalis, pseudo-ochrobactrum anthropi, brevibacillus brevis, leucobacter and paracoccus, and carry out biodegradation on organic pollutants in the wastewater.
Further, the deep oxidation treatment unit adopts an ozone-hydrogen peroxide combination method to carry out oxidative decomposition on the residual organic pollutants which are difficult to be biodegraded in the biochemical treatment effluent.
The beneficial effects of the utility model and the prior art are as follows:
the device can carry out biochemical treatment by utilizing the biological activated carbon immobilized composite bacteria, has strong adaptability to the change of the water quality of the wastewater, generates less excess sludge and is beneficial to reducing the yield of solid waste; the device can adopt an ozone-hydrogen peroxide combined oxidation method for advanced treatment, does not need a catalyst, and is favorable for reducing the investment cost; the device has the advantages of simple equipment, easy operation, low treatment cost and high removal rate of COD in the pesticide wastewater containing the heterocyclic compound.
Drawings
FIG. 1 is a process flow diagram of a treatment process utilizing the apparatus of the present invention;
FIG. 2 is a structural view of an apparatus for treating heterocyclic compound-containing agricultural chemical wastewater according to the present invention;
the system comprises a wastewater collection unit 1, a biochemical water distribution unit 2, an SBR treatment unit 3, an anaerobic treatment unit 4, an aerobic treatment unit 5, an MBR membrane treatment equipment tank 6, a regulating tank 7, a deep oxidation unit 8, a wastewater collection tank outlet 9, a biochemical water distribution unit inlet 10, a biochemical water distribution unit outlet 11, an SBR treatment unit inlet 12, an SBR treatment unit outlet 13, an anaerobic treatment inlet 14, an anaerobic treatment outlet 15, an aerobic treatment inlet 16, an MBR treatment outlet 17, a regulating tank inlet 18, a regulating tank outlet 19, a deep oxidation inlet 20 and a deep oxidation outlet 21.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention more clear, the present invention is further described in detail by the following examples. It should be noted that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
As shown in figure 2, the device of the utility model comprises a wastewater collection unit 1, a biochemical water distribution unit 2, an SBR treatment unit 3, an anaerobic treatment unit 4, an aerobic treatment unit 5, an MBR membrane treatment equipment tank 6, a regulating tank 7 and a deep oxidation unit 8 which are connected in series in sequence. The SBR treatment unit 3, the anaerobic treatment unit 4 and the aerobic treatment unit 5 all use 100-200-mesh powdered activated carbon as a carrier, and carry composite strains to carry out biodegradation on organic pollutants in wastewater. The deep oxidation treatment unit 8 adopts an ozone-hydrogen peroxide combination method to carry out oxidative decomposition on the residual organic pollutants which are difficult to be biodegraded in the biochemical treatment effluent. The device takes SBR-anaerobic-aerobic-deep oxidation as a main line, reduces the COD value of the pesticide wastewater containing heterocyclic compounds, and ensures that the wastewater reaches the discharge standard. Adjusting the pH value of the wastewater to 7-8, carrying out SBR treatment, carrying out anaerobic biochemical treatment on the wastewater treated by the SBR, carrying out aerobic biochemical treatment on the wastewater treated by the anaerobic treatment, carrying out MBR membrane treatment on the wastewater treated by the aerobic treatment, and carrying out deep oxidation treatment on the wastewater treated by the MBR membrane.
The wastewater collection unit 1 is provided with a wastewater collection unit outlet 9; according to the direction of wastewater treatment, the front and the back of the biochemical water distribution unit 2 are respectively provided with a biochemical water distribution unit inlet 10 and a biochemical water distribution unit outlet 11; 2-4 galleries are arranged on the SBR processing unit 3, and an SBR processing unit inlet 12 and an SBR processing unit outlet 13 are arranged at the front and the rear of each gallery; the front and the back of the anaerobic treatment unit 4 are respectively provided with an anaerobic treatment unit inlet 14 and an anaerobic treatment unit outlet 15; the front end of the aerobic treatment unit 5 is provided with an aerobic treatment unit inlet 16, the rear end of the aerobic treatment unit inlet 16 is provided with an MBR membrane treatment device tank 6, and the MBR membrane treatment device tank 6 is provided with an aerobic treatment unit outlet 17; the front end of the regulating tank 7 is provided with a regulating tank inlet 18, the rear end is provided with a regulating tank outlet 19, and an aerobic treatment unit outlet 17 is communicated with the regulating tank inlet 18; the front end of the deep oxidation unit 8 is provided with a deep oxidation unit inlet (20), the rear end is provided with a deep oxidation unit outlet 21, and the connection relationship of the treatment device is as follows: an outlet 9 of the wastewater collection tank is connected with an inlet 10 of a biochemical water distribution unit, an outlet 11 of the biochemical water distribution unit is connected with an inlet 12 of an SBR treatment unit, an outlet 13 of the SBR treatment unit is connected with an inlet 14 of an anaerobic treatment unit, an outlet 15 of the anaerobic treatment unit is connected with an inlet 16 of an aerobic treatment unit, an outlet 17 of the aerobic treatment unit is connected with an inlet 18 of a regulating tank, and an outlet 19 of the regulating tank is connected with an inlet 20 of a deep oxidation unit.
As shown in fig. 1, the using method of the device is as follows:
the method comprises the following steps: pumping the wastewater from the wastewater collection tank into a biochemical water distribution unit, and adjusting the pH of the wastewater to 7-8 in the biochemical water distribution unit by adopting sulfuric acid or liquid alkali; the salinity of the wastewater in the biochemical distribution tank is less than or equal to 15 percent.
Step two: and pumping the wastewater obtained in the step one into one of the galleries of the SBR treatment unit by adopting a sequencing batch water inlet mode, so that all the galleries alternately operate according to the 'water inlet-aeration-standing-drainage' and the retention time of each batch is 24-36 h.
Step three: pumping the wastewater obtained in the step two into an anaerobic treatment unit, wherein the hydraulic retention time is 24-36 h; the anaerobic reaction device adopts an ABR anaerobic baffle reactor.
Step four: and the wastewater obtained in the step three automatically flows into an aerobic treatment unit, and the hydraulic retention time is 24-36 h.
Step five: and the wastewater obtained in the step four automatically flows into an MBR membrane treatment equipment pool, and the hydraulic retention time is 4-12 h.
Step six: and D, enabling the wastewater obtained in the fifth step to enter an adjusting tank, and adjusting the pH of the wastewater obtained in the fifth step to 8-10 by adopting liquid alkali in the adjusting tank.
Step seven: pumping the wastewater obtained in the sixth step into AOP oxidation equipment, allowing the water power to stay for 0.5-2 h, wherein the mass ratio of ozone to COD is 1.5-3: 1, and adding caustic soda liquid in the process to maintain the pH of the reaction liquid within 8-10.
Example 1
The following is a list of specific examples to illustrate the device of the present invention. The use mode and the processing flow of the device are shown in FIG. 1, and the specific steps are as follows:
the heterocyclic imidacloprid-containing production wastewater has pungent smell, and the COD in the wastewater is 33000-34000 mg/L.
SBR treatment: the utility model provides a contain heterocycle imidacloprid waste water, after biochemical distribution tank adjusts pH, gets into SBR processing unit, and this SBR processing unit divide into 3 galleries, and each gallery adopts the sequencing batch formula business turn over water mode of alternately intaking and going out water, operation control: feeding water for 3 hours (the water feeding is started simultaneously with aeration), aerating for 12 hours, standing for 8 hours, and discharging water for 4 hours, wherein the hydraulic retention time is 48 hours, and the COD of the discharged water is reduced to 5513 mg/L;
anaerobic treatment: the effluent treated by SBR enters an ABR anaerobic baffling biomembrane reactor filled with domesticated composite strains, the hydraulic retention time is 48 hours, and the COD of the effluent is reduced to 3304 mg/L.
Aerobic treatment: and (3) allowing effluent after anaerobic treatment to enter an aerobic biofilm reactor filled with domesticated LBQ efficient composite bacteria, and allowing hydraulic retention time to be 48 h, wherein COD (chemical oxygen demand) of the effluent is reduced to 252 mg/L.
MBR membrane treatment: and (3) performing aerobic treatment on the effluent, entering an MBR membrane treatment equipment pool provided with an MBR membrane treatment device, and allowing the effluent to stay for 6 hours until the COD of the effluent is reduced to 198 mg/L.
Deep oxidation treatment: treating effluent by an MBR membrane, adding 30% sodium hydroxide solution to adjust the pH to 9-10, filtering by a cartridge filter, adding 1L of hydrogen peroxide into each cubic volume of the wastewater, wherein the adding amount of ozone is 0.5 kg/h, the reaction time is 1 h, and the COD of the effluent is reduced to 21 mg/L, so that the effluent meets the primary standard of the comprehensive wastewater discharge standard of the petrochemical industry.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.

Claims (3)

1. The device for treating the pesticide-containing wastewater is characterized by comprising a wastewater collection unit (1), a biochemical water distribution unit (2), an SBR treatment unit (3), an anaerobic treatment unit (4), an aerobic treatment unit (5), an MBR membrane treatment equipment tank (6), a regulating tank (7) and a deep oxidation unit (8) which are sequentially connected in series;
a wastewater collection tank outlet (9) is arranged on the wastewater collection unit (1); according to the direction of wastewater treatment, the front and the back of the biochemical water distribution unit (2) are respectively provided with a biochemical water distribution unit inlet (10) and a biochemical water distribution unit outlet (11); 2-4 galleries are arranged on the SBR processing unit (3), and an SBR processing unit inlet (12) and an SBR processing unit outlet (13) are arranged at the front and the rear of each gallery; an anaerobic treatment unit inlet (14) and an anaerobic treatment unit outlet (15) are respectively arranged in front of and behind the anaerobic treatment unit (4); the front end of the aerobic treatment unit (5) is provided with an aerobic treatment unit inlet (16), the rear end of the aerobic treatment unit inlet (16) is provided with an MBR (membrane bioreactor) membrane treatment device tank (6), and the MBR membrane treatment device tank (6) is provided with an aerobic treatment unit outlet (17); the front end of the regulating tank (7) is provided with a regulating tank inlet (18), the rear end of the regulating tank is provided with a regulating tank outlet (19), and an aerobic treatment unit outlet (17) is communicated with the regulating tank inlet (18); the front end of the deep oxidation unit (8) is provided with a deep oxidation unit inlet (20), and the rear end is provided with a deep oxidation unit outlet (21).
2. The heterocyclic compound-containing pesticide wastewater treatment device as set forth in claim 1, wherein the connection relationship of the treatment device is: an outlet (9) of the wastewater collection tank is connected with an inlet (10) of a biochemical water distribution unit, an outlet (11) of the biochemical water distribution unit is connected with an inlet (12) of an SBR treatment unit, an outlet (13) of the SBR treatment unit is connected with an inlet (14) of an anaerobic treatment unit, an outlet (15) of the anaerobic treatment unit is connected with an inlet (16) of an aerobic treatment unit, an outlet (17) of the aerobic treatment unit is connected with an inlet (18) of a regulating tank, and an outlet (19) of the regulating tank is connected with an inlet (20) of a deep oxidation unit.
3. The heterocyclic compound-containing pesticide wastewater treatment device as claimed in claim 1, wherein the SBR treatment unit (3), the anaerobic treatment unit (4) and the aerobic treatment unit (5) all use 100-200 mesh powdered activated carbon as a carrier.
CN202122988118.8U 2021-12-01 2021-12-01 Contain heterocyclic compound pesticide effluent treatment plant Active CN216639207U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202122988118.8U CN216639207U (en) 2021-12-01 2021-12-01 Contain heterocyclic compound pesticide effluent treatment plant

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Application Number Priority Date Filing Date Title
CN202122988118.8U CN216639207U (en) 2021-12-01 2021-12-01 Contain heterocyclic compound pesticide effluent treatment plant

Publications (1)

Publication Number Publication Date
CN216639207U true CN216639207U (en) 2022-05-31

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