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Method for treating high-concentration organic hybrid wastewater by using micro-electrolytic filler

A micro-electrolysis and high-concentration technology, applied in filtration treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of high consumption of ferrous sulfate, cumbersome and complicated operation, impact on biochemical systems, etc., and reduce the usage , simple process and low cost

Inactive Publication Date: 2017-02-22
四川欣欣环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wastewater needs to be diluted twice during the treatment process, and the dilution factor is large, resulting in low daily treatment volume and cumbersome and complicated operations
And because the mixed wastewater contains heavy metal ions, it is easy to cause impact on the biochemical system
At the same time, in the Fenton reaction, the consumption of hydrogen peroxide and ferrous sulfate is large, resulting in high cost and large slag production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] 5m3 mixed waste water with raw water COD(Cr) of 140000mg / L is filtered, air floated, adjusted to PH = 2 with sulfuric acid, and then enters the micro-electrolysis packing column, keeping the waste water in the packing column for 4 hours, adding 25kg of 30% hydrogen peroxide to the effluent, After stirring for 4 hours, the pH was adjusted to 8. The measured COD (Cr) in the supernatant was 10,000 mg / L, and the removal rate was 71.4%. It can directly enter the biochemical system and discharge up to the standard.

example 2

[0021] 5m3 of mixed waste water with raw water COD(Cr) of 130000mg / L is filtered, air-floated, adjusted to PH = 4 with sulfuric acid, and then enters the micro-electrolysis packing column. The waste water is kept in the packing column for 3 hours, and 20kg of 30% hydrogen peroxide is added to the effluent. After stirring for 4 hours, the pH was adjusted to 8. The measured COD (Cr) in the supernatant was 9000 mg / L, and the removal rate was 69.2%. It can directly enter the biochemical system and discharge up to the standard.

example 3

[0023] 5m3 of mixed waste water with raw water COD(Cr) of 60000mg / L is filtered, air floated, adjusted to PH = 6 with sulfuric acid, and then enters the micro-electrolysis packing column. The waste water is kept in the packing column for 2 hours, and 12kg of 30% hydrogen peroxide is added to the effluent. After stirring for 3 hours, the pH was adjusted to 8. The COD (Cr) in the supernatant was determined to be 4000 mg / L, and the removal rate was 93.3%. It can directly enter the biochemical system and discharge up to the standard.

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PUM

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Abstract

The invention discloses a method for treating high-concentration organic hybrid wastewater by using a micro-electrolytic filler. The method comprises the following steps: filtering the high-concentration organic hybrid wastewater to remove insoluble solid impurities, carrying out air floatation to remove oil, adjusting the pH value by using an acid or an alkali, allowing the obtained wastewater to go through a micro-electrolytic filled column, adding hydrogen peroxide into outlet water, carrying out a reaction for a certain time, neutralizing obtained water, filtering the neutralized water, and carrying out biochemical treatment on the obtained outlet water to realize standard-reaching discharge. The method has the advantages of high practicality, simple technology, high COD removal rate and low cost, and is a good treatment method of the high-concentration organic hybrid wastewater.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a method for treating high-concentration organic mixed wastewater with micro-electrolytic fillers. Background technique [0002] Most of the wastewater collected and treated is high-concentration organic wastewater, COD(Cr) is generally above 2000-200000mg / L, and there are many sources, mainly organic wastewater, pharmaceutical wastewater, electroplating wastewater, oily wastewater, etc., and mixed together. The current treatment methods are mainly pre-filtration, oil separation, dilution to low concentration, Fenton reaction, dilution, and discharge into the biochemical system to meet the standard. Wastewater needs to be diluted twice during the treatment process, and the dilution factor is large, resulting in low daily treatment volume and cumbersome and complicated operations. And because the mixed wastewater contains heavy metal ions, it is easy to cause impact on the biochem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/461
CPCC02F9/00C02F1/001C02F1/24C02F1/461C02F1/66C02F1/722C02F3/00C02F2305/026
Inventor 王家文黄京袁伟杨璐
Owner 四川欣欣环保科技有限公司
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