Cyanide-containing wastewater treatment method

A treatment method, the technology of cyanide wastewater, which is applied in the field of water treatment, can solve the problems of air pollution, incomplete ferrous sulfate treatment, and the effluent can not meet the discharge standard, so as to achieve the effect of reducing pollution

Inactive Publication Date: 2019-12-20
卞玉梅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the alkaline chlorination method is widely used, the ferrous sulfate method is not thorough and unstable, and the air stripping method pollutes the atmosphere, and the effluent does not meet the discharge standard, so it is seldom used.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for treating cyanide-containing wastewater, the method comprising the steps of:

[0018] (1) Adjust the pH value of the cyanide-containing wastewater to 6.5-7.5;

[0019] (2) Carry out electrolysis reaction, the electrode of electrolysis reaction adopts graphite electrode;

[0020] (3) Aeration reaction while stirring and adding flocculant and coagulant;

[0021] (4) precipitate and filter and take the filtrate;

[0022] (5) The filtrate treated in step (4) is subjected to an ultraviolet oxidation reaction and then discharged.

[0023] In the method for treating cyanide-containing wastewater described in this embodiment, sulfuric acid, hydrochloric acid, sodium hydroxide solution or milk of lime is used for pH adjustment in step (1).

[0024] In the method for treating cyanide-containing wastewater described in this embodiment, polyacrylamide is used as the flocculant described in step (3), and sodium sulfate is used as the coagulant aid; the amount added is...

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PUM

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Abstract

The invention provides a cyanide-containing wastewater treatment method. The cyanide-containing wastewater treatment method is characterized by comprising: (1) adjusting the pH value of cyanide-containing wastewater to 6.5-7.5; (2) carrying out electrolytic reaction, and adopting graphite electrode as the electrode of the electrolytic reaction; (3) carrying out aeration reaction while stirring, and adding a flocculating agent and a coagulant aid; (4) conducting precipitating and filtering and taking the filtrate; and (5) carrying out ultraviolet oxidation reaction on the filtrate treated by step (4), and then performing discharging. The method provided by the invention performs thorough treatment on cyanide-containing wastewater, and eliminates or reduces the pollution of cyanide-containing wastewater to the environment.

Description

Technical field: [0001] The invention relates to a method for treating cyanide-containing wastewater, which belongs to the technical field of water treatment. Background technique: [0002] Cyanide-containing wastewater mainly comes from electroplating, gas, coking, metallurgy, metal processing, chemical fiber, plastic, pesticide, chemical and other departments. Cyanide-containing wastewater is a kind of highly toxic industrial wastewater. It is unstable in water and easy to decompose. Both inorganic cyanide and organic cyanide are highly toxic substances, and human ingestion can cause acute poisoning. The existing cyanide-containing wastewater treatment measures mainly include: (1) Reform the process to reduce or eliminate the external discharge of cyanide-containing wastewater, such as the use of cyanide-free electroplating to eliminate industrial wastewater in electroplating workshops. (2) Wastewater with high cyanide content should be recycled, and waste water with low ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F101/18C02F101/38
CPCC02F1/001C02F1/32C02F1/461C02F1/5236C02F1/56C02F1/66C02F1/72C02F9/00C02F2001/007C02F2101/18C02F2101/38C02F2301/08
Inventor 卞玉梅
Owner 卞玉梅
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