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Method for treating pyridine pesticide wastewater by aid of biological-electrochemical coupling technologies

A technology for the treatment of pesticide wastewater, which is applied in the field of bio-electrochemical coupling technology to treat pyridine pesticide wastewater, and can solve the problems that the removal rate of COD and total nitrogen is difficult to meet the takeover requirements.

Active Publication Date: 2018-11-27
江苏南大华兴环保科技股份公司
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  • Description
  • Claims
  • Application Information

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

Method used

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  • Method for treating pyridine pesticide wastewater by aid of biological-electrochemical coupling technologies
  • Method for treating pyridine pesticide wastewater by aid of biological-electrochemical coupling technologies
  • Method for treating pyridine pesticide wastewater by aid of biological-electrochemical coupling technologies

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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 the aid of biological-electrochemical coupling technologies, and belongs to the technical field of pesticide wastewater treatment. The method includes carrying out UBF+O / A / O microbial enhanced treatment on the pyridine pesticide wastewater; carrying out sand filter on biochemical effluent and then treating the biochemical effluent by the aid of electro-catalytic oxidation technologies. The method has the advantages that exogenous electron receptors are provided, accordingly, anaerobic and anoxia biodegradation effects can be enhanced, and ring-opening degradation of pyridine substances can be promoted; the biochemical effluent is efficiently electro-catalytically oxidized to treat the wastewater, accordingly, the high-COD (chemical oxygen demand), high-ammonia and high-nitrogen pyridine wastewater which is difficult to biochemically degrade can be efficiently and stably treated by the aid of the method, andpyridine pesticide wastewater discharge can reach standards; the method is easy and convenient to operate, high in efficiency and stability and free of secondary pollution, maintenance can be facilitated, and the like.

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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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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