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A method of biological-electrochemical coupling technology for treating pyridine pesticide wastewater

A technology for technical treatment and pesticide wastewater, which is applied in the field of biological-electrochemical coupling technology to treat pyridine pesticide wastewater, which can solve the problem that the removal rate of COD and total nitrogen cannot meet the requirements of taking over.

Active Publication Date: 2021-04-23
江苏南大华兴环保科技股份公司
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0009] In view of the problem in the prior art that the removal rate of COD and total nitrogen is difficult to meet the takeover requirements when the temperature is low due to electrocatalytic oxidation and then biochemical treatment of pyridine-containing wastewater, the present invention provides a biological-electrochemical coupling technology to treat pyridine The method of pesticide-like wastewater, through the rational design of the process, can not only realize the open-loop degradation of pyridine substances and effectively mineralize the intermediate products, but also ensure that COD and total nitrogen do not fluctuate with the change of ambient temperature, which can be used in practical applications Ensure that the outlet water meets the requirements of the connection at various temperatures

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  • A method of biological-electrochemical coupling technology for treating pyridine pesticide wastewater
  • A method of biological-electrochemical coupling technology for treating pyridine pesticide wastewater
  • A method of biological-electrochemical coupling technology for treating pyridine pesticide wastewater

Examples

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Embodiment 1

[0046] Such as figure 1 As shown, this embodiment provides a method for treating pyridine pesticide wastewater by bio-electrochemical coupling technology, wherein the pyridine pesticide wastewater is the pyridine pesticide wastewater from the first workshop of a pesticide enterprise in Binhai, Jiangsu, and is treated at an ambient temperature of 20°C. Proceed as follows:

[0047] (1) Pyridine wastewater enters the collection pool of the terminal sewage station after steaming and resin adsorption in the workshop;

[0048] (2) The waste water from the collection pond is pumped into the biochemical adjustment pond, the pH value is adjusted to 7 with sodium carbonate, and 50 mg / L sodium nitrate is added simultaneously to carry out homogenization and equalization;

[0049] (3) waste water in step (2) enters the microbial treatment section of UBF+O / A / O, UBF anaerobic residence time 60h, O section residence time 60h, A section residence time 20h, secondary O section with 100% The r...

Embodiment 2

[0062] Such as figure 1 As shown, this embodiment provides a method for treating pyridine pesticide wastewater by bio-electrochemical coupling technology, wherein the pyridine pesticide wastewater is picoline pesticide wastewater, and at an ambient temperature of 15°C, the treatment steps are as follows:

[0063] (1) Pyridine waste water is pretreated by stripping in the workshop and then enters the collection pool of the terminal sewage station;

[0064] (2) Pump the waste water from the collection pond into the biochemical adjustment pond, adjust the pH value to 7.5 with sodium carbonate, and add a mixture of 60 mg / L sodium nitrate and sodium nitrite at a mass ratio of 1:1 at the same time for homogenization and equalization;

[0065] (3) waste water in step (2) is entered into the microbial treatment section of UBF+O / A / O, UBF anaerobic residence time 72h, O section residence time 72h, A section residence time 16h, secondary O section with 200% The reflux ratio returns to s...

Embodiment 3

[0073] Such as figure 1 As shown, this example provides a method for treating pyridine pesticide wastewater by bio-electrochemical coupling technology, wherein the pyridine pesticide wastewater is 3-cyanopyridine pesticide intermediate wastewater, and the treatment steps are as follows at an ambient temperature of 10°C:

[0074] (1) Pyridine wastewater enters the collection pool of the terminal sewage station after being adsorbed by resin in the workshop;

[0075] (2) Pump the waste water from the collection pond into the biochemical adjustment pond, adjust the pH value to 8 with sodium carbonate, and add 30 mg / L sodium nitrite simultaneously to carry out homogenization and equalization;

[0076] (3) waste water in step (2) is entered into the microbial treatment section of UBF+O / A / O, UBF anaerobic residence time 36h, O section residence time 84h, A section residence time 36h, secondary O section with 400% The reflux ratio returns to section A, and the effluent flows to the s...

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Abstract

The invention discloses a method for treating pyridine pesticide wastewater by bio-electrochemical coupling technology, and belongs to the technical field of pesticide wastewater treatment. The treatment method of the present invention is as follows: the pyridine pesticide wastewater is subjected to UBF+O / A / O microbial enhancement treatment, and the biochemical effluent is treated by electrocatalytic oxidation technology after sand filtration. In the present invention, exogenous electron acceptors are provided to enhance the biodegradation effect of anaerobic and anoxic, and promote the open-loop degradation of pyridine substances. The biochemical effluent is treated with high-efficiency electrocatalytic oxidation to realize high COD, high ammonia nitrogen, The efficient and stable treatment of pyridine wastewater that is difficult to biodegrade can make the discharge of pyridine pesticide wastewater reach the standard; the treatment method is easy to operate, has the advantages of high efficiency, high stability, convenient maintenance, and no secondary pollution.

Description

technical field [0001] The invention belongs to the field of pesticide wastewater treatment technology, and in particular relates to a method for treating pyridine pesticide wastewater with a bio-electrochemical coupling technology. Background technique [0002] Pyridine is a low-toxic organic substance with a special odor and has a certain degree of biological inhibition. The maximum concentration that has no effect on the operation of microbial treatment facilities is 400mg / L. The unshared electron pair on the N atom in the pyridine molecule does not participate in the formation of the π-electron conjugate system on the ring; on the contrary, due to the strong electronegativity of the N atom, it will attract the electrons on the ring and reduce the electron cloud density on the ring. Oxygen is hindered from obtaining electrons from molecules. This structure is called "π electron-deficient structure", so pyridine wastewater is difficult to biodegrade. In addition, under ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/38
CPCC02F1/001C02F1/04C02F1/285C02F1/46109C02F1/4672C02F1/66C02F1/725C02F3/28C02F3/30C02F9/00C02F2001/007C02F2001/46142C02F2101/306C02F2101/38C02F2301/08
Inventor 赵选英杨峰戴建军刘君君王智宁唐伟杰
Owner 江苏南大华兴环保科技股份公司
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