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Method for biodegrading organophosphorus pesticide wastewater

An organophosphorus pesticide and biodegradation technology, applied in biological water/sewage treatment, chemical instruments and methods, water/sewage treatment, etc. The effect of improving the biodegradation rate and improving the removal rate

Active Publication Date: 2019-04-26
NANTONG VOCATIONAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of wastewater contains a large amount of organophosphorus pesticide intermediates and hydrolyzed products, which are highly toxic, have many refractory substances, and have poor biochemical properties. It is difficult to directly use biochemical methods to treat them without mixing or diluting other organic wastewater.
[0003] There are no research reports on the resource bank of dominant strains for the degradation of organophosphorus pesticide wastewater, the degradation of organophosphorus pesticide wastewater by composite strains and its immobilization technology in China.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] S1. Collect waste water through the waste water collection tank, and send the collected waste water through the filter to the electrolysis device for electrolytic purification, in which activated carbon, Ag and surface-coated PbO 2 The inert metal of the oxide film is the anode, and the iron plate is the cathode;

[0034] S2. Add a mixture of limestone and calcium chloride to the electrolyzed waste water, and adjust the pH of the solution to about 8, so that the phosphite radical forms its calcium salt, which is removed by filtration;

[0035] S3, throwing in an oxidizing agent at a ratio of 500mg / L to oxidize the reducing hypophosphite into phosphate and form calcium salt, which is removed by filtration;

[0036] S4, prepare biodegradant:

[0037] S41. Take 60 parts of Ge Xianmi freeze-dried powder, 30 parts of broken-wall spirulina liquid, 11 parts of glucose, 0.3 part of magnesium sulfate, 0.3 part of potassium dihydrogen phosphate, 0.2 part of manganese amino acid ...

Embodiment 2

[0044] S1. Collect wastewater through the wastewater collection tank, and send the collected wastewater through the filter to the electrolysis device for electrolytic purification, in which activated carbon, Pt, and surface-coated SnO 2 The inert metal of the oxide film is the anode, and the iron plate is the cathode;

[0045] S2. Add a mixture of limestone and calcium chloride to the wastewater after electrolysis, and adjust the pH of the solution to about 9, so that phosphite forms its calcium salt, and remove it by filtration;

[0046] S3, throwing in an oxidizing agent at a ratio of 500mg / L to oxidize the reducing hypophosphite into phosphate and form calcium salt, which is removed by filtration;

[0047] S4, prepare biodegradant:

[0048]S41. Take 110 parts of Ge Xianmi freeze-dried powder, 40 parts of broken-wall spirulina liquid, 15 parts of glucose, 0.7 part of magnesium sulfate, 0.7 part of potassium dihydrogen phosphate, 0.3 part of manganese amino acid chelate, 0.3...

Embodiment 3

[0055] S1. Collect waste water through the waste water collection tank, and send the collected waste water through the filter to the electrolysis device for electrolytic purification, in which activated carbon, Ti and Sb are coated on the surface 2 o 5 The inert metal of the oxide film is the anode, and the iron plate is the cathode;

[0056] S2. Add a mixture of limestone and calcium chloride to the wastewater after electrolysis, and adjust the pH of the solution to about 8.5, so that phosphite forms its calcium salt, and remove it by filtration;

[0057] S3, throwing in an oxidizing agent at a ratio of 500mg / L to oxidize the reducing hypophosphite into phosphate and form calcium salt, which is removed by filtration;

[0058] S4, prepare biodegradant:

[0059] S41. Take 85 parts of Ge Xianmi freeze-dried powder, 35 parts of broken-wall spirulina liquid, 13.5 parts of glucose, 0.5 part of magnesium sulfate, 0.5 part of potassium dihydrogen phosphate, 0.25 part of manganese a...

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PUM

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Abstract

The invention discloses a method for biodegradation of organic phosphorus pesticide wastewater, wherein the method comprises the following steps: after wastewater is subjected to electrolysis purification, adding a mixture composed of limestone and calcium chloride, putting an oxidizing agent, forming a calcium salt, and filtering to remove the calcium salt; weighing bacillus amyloliquefaciens Ba2015036, bacillus subtilis, rhodococcus rhodochrous strains R-MS6, aspergillus niger strains J15 and aspergillus niger strains J27 according to the proportion, to prepare a biodegradable agent; sending a part of the obtained wastewater into an SBR reactor, staying for 24 h, then putting a proper amount of the biodegradable agent, carrying out closed aeration for 2 d, and then continuously feeding water with the speed progressively increased at the speed rate of 5%; and adding a proper amount of ferrous sulfate into the wastewater treated by the SBR reactor, carrying out a coagulation reaction, and filtering. Through reasonable selection, proportion and culture of the dominant degrading strains, the biodegradation rate is increased, and at the same time, with collaboration of electrolytic purification, oxidizing agent treatment and SBR reactor treatment, the removal rate of organic phosphorus is greatly increased.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method for biodegrading organic phosphorus pesticide wastewater. Background technique [0002] The treatment of organophosphorus pesticide wastewater has become a difficult problem in the field of water treatment at home and abroad. This type of wastewater contains a large amount of organophosphorus pesticide intermediates and hydrolyzed products, which are highly toxic, have many refractory substances, and have poor biochemical properties. It is difficult to directly use biochemical methods to treat them without mixing or diluting other organic wastewater. [0003] In China, there have been no research reports on the resource bank of dominant strains for the degradation of organophosphorus pesticide wastewater, the degradation of organophosphorus pesticide wastewater by composite strains and its immobilization technology. Contents of the invention [0004] In order to so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
CPCC02F1/461C02F1/5236C02F1/72C02F3/1263C02F3/34C02F9/00
Inventor 李铁军丁邦琴李百裕周春晓李德全邢红梅
Owner NANTONG VOCATIONAL COLLEGE
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