Benzene series-containing wastewater treatment system

Abstract

The utility model belongs to the technical field of treating wastewater containing benzene series by combining an advanced oxidation method and a biochemical method, and discloses a system for treating wastewater containing benzene series, which is a two-stage electrocatalytic oxidation method and biochemical method treatment system. Comprising a raw water inlet pipeline, a first-stage electrocatalytic oxidation device, a first-stage anaerobic water inlet pipeline, a first-stage lifting pump, a first-stage efficient anaerobic reactor, a first-stage aerobic water inlet pipeline, a first-stage efficient aerobic reactor, a first-stage secondary sedimentation tank water inlet pipeline, a first-stage secondary sedimentation tank, a second-stage electrocatalytic oxidation water inlet pipeline, a second-stage electrocatalytic oxidation device and a second-stage anaerobic water inlet pipeline, the system comprises a first-stage lifting pump, a second-stage high-efficiency anaerobic reactor, a second-stage aerobic water inlet pipeline, a second-stage high-efficiency aerobic reactor, a second-stage secondary sedimentation tank water inlet pipeline, a second-stage secondary sedimentation tank and a water outlet pipeline. A two-stage electrocatalytic oxidation method and biochemical method treatment system is used as a benzene series-containing wastewater treatment process; and through a two-stage electrocatalytic oxidation method and biochemical method treatment system, stable and standard reaching is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the senior oxidation method combined biochemistry method treatment benzene series wastewater technical field relates to two stage electric catalytic oxidation method + biochemistry method, concretely is a kind of benzene series wastewater treatment system. BACKGROUND

[0002] Benzene series is a kind of toxic and harmful substance, and high concentration benzene series in water can produce biological toxicity to microorganism in biochemical system, lead to abnormality such as low wastewater degradation rate, sludge disintegration, and affect system operation stability.

[0003] Senior oxidation method is oxidized into inorganic substance or small molecule organic matter by producing hydroxyl radical with strong oxidizing property to difficult degradation macromolecular organic matter, and play the role of degrading toxic and harmful substance. Therefore, senior oxidation method combined biochemistry method is the main trend of benzene series wastewater treatment, and electrochemical oxidation method combined biochemistry method is widely concerned.

[0004] And in practical application, it is found that primary electric catalytic oxidation method + biochemistry method cannot guarantee stable standard reaching, thereby limit the application of single-stage treatment process. Therefore, it is necessary to develop a two-stage treatment system to ensure that benzene series wastewater treatment is stable and up to standard. UTILITY MODEL CONTENT

[0005] In order to solve the above technical problems, the utility model provides a two-stage electric catalytic oxidation method + biochemistry method treatment system to realize that benzene series wastewater treatment is stable and up to standard.

[0006] The technical scheme of the utility model:

[0007] A benzene series wastewater treatment system is a two-stage electric catalytic oxidation method + biochemistry method treatment system, which comprises a raw water inlet pipeline, a primary electric catalytic oxidation device, a primary anaerobic water inlet pipeline, a primary booster pump, a primary high-efficiency anaerobic reactor, a primary aerobic water inlet pipeline, a primary high-efficiency aerobic reactor, a primary secondary sedimentation tank water inlet pipeline, a primary secondary sedimentation tank, a secondary electric catalytic oxidation water inlet pipeline, a secondary electric catalytic oxidation device, a secondary anaerobic water inlet pipeline, a secondary booster pump, a secondary high-efficiency anaerobic reactor, a secondary aerobic water inlet pipeline, a secondary high-efficiency aerobic reactor, a secondary secondary sedimentation tank water inlet pipeline, a secondary secondary sedimentation tank and a water outlet pipeline.

[0008] The water inlet at the lower end of the first electro-catalytic oxidation device is connected with the raw water inlet pipeline, the water outlet of the first electro-catalytic oxidation device is connected with the upper end water inlet of the first high-efficiency anaerobic reactor through the first anaerobic water inlet pipeline, and a first lifting pump is arranged on the first anaerobic water inlet pipeline; the lower end water outlet of the first high-efficiency anaerobic reactor is connected with the upper end water inlet of the first high-efficiency aerobic reactor through the first aerobic water inlet pipeline; the lower end water outlet of the first high-efficiency aerobic reactor is connected with the upper end water inlet of the first secondary sedimentation tank through the first secondary sedimentation tank water inlet pipeline; the lower end water outlet of the first secondary sedimentation tank is connected with the water inlet of the second electro-catalytic oxidation device through the second electro-catalytic oxidation water inlet pipeline, the water outlet of the second electro-catalytic oxidation device is connected with the upper end water inlet of the second high-efficiency anaerobic reactor through the second anaerobic water inlet pipeline, and a second lifting pump is arranged on the second anaerobic water inlet pipeline; the lower end water outlet of the second high-efficiency anaerobic reactor is connected with the upper end water inlet of the second high-efficiency aerobic reactor through the second aerobic water inlet pipeline, the lower end water outlet of the second high-efficiency aerobic reactor is connected with the water inlet of the second secondary sedimentation tank through the second secondary sedimentation tank water inlet pipeline, and the water outlet of the second secondary sedimentation tank is connected with the water outlet pipeline.

[0009] The utility model discloses beneficial effect has:

[0010] (1) through a two-stage electro-catalytic oxidation method + biological chemistry method processing system, as containing benzene series waste water treatment process;

[0011] (2) through two-stage electro-catalytic oxidation method + biological chemistry method processing system, guarantee stable standard. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the process flow schematic diagram of the utility model two-stage electro-catalytic oxidation method + biological chemistry method processing system.

[0013] In the drawing: 1 raw water inlet pipeline;2 first electro-catalytic oxidation device;3 first anaerobic water inlet pipeline;4 first lifting pump;5 first high-efficiency anaerobic reactor;6 first aerobic water inlet pipeline;7 first high-efficiency aerobic reactor;8 first secondary sedimentation tank water inlet pipeline;9 first secondary sedimentation tank;10 second electro-catalytic oxidation water inlet pipeline;11 second electro-catalytic oxidation device;12 second anaerobic water inlet pipeline;13 second lifting pump;14 second high-efficiency anaerobic reactor;15 second aerobic water inlet pipeline;16 second high-efficiency aerobic reactor;17 second secondary sedimentation tank water inlet pipeline;18 second secondary sedimentation tank;19 water outlet pipeline. DETAILED DESCRIPTION

[0014] The specific implementation of the utility model is further illustrated below in combination with the drawings and technical solutions.

[0015] EMBODIMENT

[0016] A wastewater treatment system containing benzene compounds is a two-stage electrocatalytic oxidation + biochemical treatment system, comprising: raw water inlet pipeline 1, primary electrocatalytic oxidation device 2, primary anaerobic inlet pipeline 3, primary booster pump 4, primary high-efficiency anaerobic reactor 5, primary aerobic inlet pipeline 6, primary high-efficiency aerobic reactor 7, primary secondary sedimentation tank inlet pipeline 8, primary secondary sedimentation tank 9, secondary electrocatalytic oxidation inlet pipeline 10, secondary electrocatalytic oxidation device 11, secondary anaerobic inlet pipeline 12, secondary booster pump 13, secondary high-efficiency anaerobic reactor 14, secondary aerobic inlet pipeline 15, secondary high-efficiency aerobic reactor 16, secondary secondary sedimentation tank inlet pipeline 17, secondary secondary sedimentation tank 18, and effluent pipeline 19.

[0017] Raw water enters the primary electrocatalytic oxidation unit 2 via inlet pipeline 1. After electrocatalytic oxidation, it is lifted by primary booster pump 4 and then passes sequentially through primary high-efficiency anaerobic reactor 5, primary high-efficiency aerobic reactor 7, and primary secondary sedimentation tank 9 to complete the primary reaction. The effluent from primary secondary sedimentation tank 9 enters the secondary electrocatalytic oxidation unit 11. After electrocatalytic oxidation, it is lifted by secondary booster pump 13 and then passes sequentially through secondary high-efficiency anaerobic reactor 14, secondary high-efficiency aerobic reactor 16, and secondary secondary sedimentation tank 18 to complete the secondary reaction.

[0018] like Figure 1 As shown, the raw water has a benzene series concentration of 60 mg / L and a flow rate of 10 t / h. It enters the primary electrocatalytic oxidation unit 2. After electrocatalytic oxidation, the water is pumped by the primary lift pump 4 and enters the primary high-efficiency anaerobic reactor 5. The effluent from the primary high-efficiency anaerobic reactor 5 enters the primary high-efficiency aerobic reactor 7. The effluent from the primary high-efficiency aerobic reactor 7 enters the primary secondary sedimentation tank 9. The benzene series concentration in the effluent from the primary secondary sedimentation tank 9 is 12.2 mg / L, which does not meet the standard requirements. A two-stage treatment system is adopted. The effluent from the primary treatment enters the secondary electrocatalytic oxidation unit 11. After electrocatalytic oxidation, the water is pumped by the secondary lift pump 13 and enters the secondary high-efficiency anaerobic reactor 14. The effluent from the secondary high-efficiency anaerobic reactor 14 enters the secondary high-efficiency aerobic reactor 16. The effluent from the secondary high-efficiency aerobic reactor 16 enters the secondary secondary sedimentation tank 18. The benzene series concentration in the effluent from the secondary secondary sedimentation tank 18 is 2.5 mg / L, which meets the standard requirements. Part of the sludge from the secondary sedimentation tank is recycled to the high-efficiency anaerobic reactor and the high-efficiency aerobic reactor, and part is discharged externally.

Claims

1. A system for treating wastewater containing benzene series, characterized by comprising: The benzene-containing wastewater treatment system is a two-stage electro-catalytic oxidation and biochemical treatment system, comprising a raw water inlet pipeline, a first-stage electro-catalytic oxidation device, a first-stage anaerobic water inlet pipeline, a first-stage lifting pump, a first-stage high-efficiency anaerobic reactor, a first-stage aerobic water inlet pipeline, a first-stage high-efficiency aerobic reactor, a first-stage secondary sedimentation tank water inlet pipeline, a first-stage secondary sedimentation tank, a second-stage electro-catalytic oxidation water inlet pipeline, a second-stage electro-catalytic oxidation device, a second-stage anaerobic water inlet pipeline, a second-stage lifting pump, a second-stage high-efficiency anaerobic reactor, a second-stage aerobic water inlet pipeline, a second-stage high-efficiency aerobic reactor, a second-stage secondary sedimentation tank water inlet pipeline, a second-stage secondary sedimentation tank and a water outlet pipeline; The water inlet of the lower end of the first-stage electro-catalytic oxidation device is connected with the raw water inlet pipeline, the water outlet of the first-stage electro-catalytic oxidation device is connected with the upper end water inlet of the first-stage high-efficiency anaerobic reactor through the first-stage anaerobic water inlet pipeline, and the first-stage lifting pump is arranged on the first-stage anaerobic water inlet pipeline; the lower end water outlet of the first-stage high-efficiency anaerobic reactor is connected with the upper end water inlet of the first-stage high-efficiency aerobic reactor through the first-stage aerobic water inlet pipeline; the lower end water outlet of the first-stage high-efficiency aerobic reactor is connected with the upper end water inlet of the first-stage secondary sedimentation tank through the first-stage secondary sedimentation tank water inlet pipeline; the lower end water outlet of the first-stage secondary sedimentation tank is connected with the water inlet of the second-stage electro-catalytic oxidation device through the second-stage electro-catalytic oxidation water inlet pipeline, and the water outlet of the second-stage electro-catalytic oxidation device is connected with the upper end water inlet of the second-stage high-efficiency anaerobic reactor through the second-stage anaerobic water inlet pipeline, and the second-stage lifting pump is arranged on the second-stage anaerobic water inlet pipeline; The lower end water outlet of the second-stage high-efficiency anaerobic reactor is connected with the upper end water inlet of the second-stage high-efficiency aerobic reactor through the second-stage aerobic water inlet pipeline, the lower end water outlet of the second-stage high-efficiency aerobic reactor is connected with the water inlet of the second-stage secondary sedimentation tank through the second-stage secondary sedimentation tank water inlet pipeline, and the water outlet of the second-stage secondary sedimentation tank is connected with the water outlet pipeline.

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