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Method for treating emulsifying wastewater by use of adsorption flocculant

A technology of emulsified wastewater and flocculant, which is applied in the fields of flocculation/sedimentation water/sewage treatment, chemical instruments and methods, water/sewage treatment, etc. It can solve problems such as insufficient incineration, high moisture content, and high energy consumption for incineration. Achieve the effects of slowing air pollution, convenient implementation, and reducing incineration time

Inactive Publication Date: 2016-10-12
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

At present, the domestic emulsified wastewater is widely used in direct incineration, which has a large amount of incineration, high water content, high energy consumption, and insufficient incineration, which seriously pollutes the air.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] The cod of the cutting fluid cleaning wastewater in a processing plant is 26000mg / L, and the main component is high molecular organic substances. The amount of polyaluminum chloride to be added per ton of emulsified wastewater is 4.5kg (calculated as elemental iron), neutralized with lime to a pH value of 7.8-8.2, the solidified product of press filtration is 33.5kg, and the filtrate cod is reduced to 3000mg / L. After anaerobic and contact oxidation biochemical treatment, the cod of the discharged water is 95.52mg / L and other indicators have reached the national first-class discharge water discharge standard.

example 2

[0027] The cod of the cutting fluid cleaning wastewater from a lathe manufacturer is 45000mg / L, and the main component is high molecular organic substances. Add 7.5kg of polyferric sulfate per ton of emulsified wastewater (calculated as elemental iron), neutralize with lime to pH 8-9, press filter solidified product to 76.5kg, filtrate cod drops to 2768mg / L and then After anaerobic and contact oxidation biochemical treatment, the COD of the discharged water is 85.44mg / L, and other indicators have reached the national first-class discharge water discharge standard.

example 3

[0029] The cod of the cutting fluid cleaning wastewater from a lathe manufacturer is 65000mg / L, and the main component is high molecular organic substances. Add 8kg of mixed flocculant (polyferric sulfate 7kg, polyacrylamide 1kg) per ton of emulsified wastewater, neutralize with lime to pH 8-9, press filter solidified product to 85.3kg, filtrate cod drops to 2540mg / L and then After anaerobic and contact oxidation biochemical treatment, the cod of the discharged water is 89.56mg / L and other indicators have reached the national first-class discharge water discharge standard.

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PUM

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Abstract

The invention discloses a method for treating emulsifying wastewater by use of an adsorption flocculant. The method is characterized by comprising the following steps: adding an adsorbent into the emulsifying wastewater at certain proportion according to the emulsifying degree of the emulsifying wastewater; adjusting the pH with acid and alkali until precipitate is separated out; and filtering to obtain clear liquid and solid, wherein the solid precipitate is small and facilitates transportation and can be directly burnt; and after adsorption, the clear liquid is directly subjected to biochemical treatment and then reaches the national discharge standard. In the invention, by adopting the adsorption way, main pollutants not good for biochemical degradation in the emulsifying wastewater are solidified, the solidified products facilitate centralized treatment, and the wastewater after adsorption can be directly subjected to biochemical treatment and then reaches the national discharge standard. The method is simple in technology, convenient to implement and very suitable for treating the emulsifying wastewater.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a method for treating emulsified wastewater with an adsorption flocculant. Background technique [0002] Emulsified wastewater contains emulsifiers and synthetic oily polymer substances, and its biodegradability is very poor. If it is discharged directly without treatment, it will be extremely harmful to the environment. At the same time, a large amount of organic toxic substances will accumulate in the environment and eventually enter the human body to endanger human health. At present, the domestic emulsified wastewater is widely used in direct incineration, which has a large amount of incineration and high water content, which consumes a lot of energy, and incineration is not very sufficient, which seriously pollutes the air. It is particularly important to seek a fast, efficient and low-cost disposal method. Contents of the invention [0003] The purpose of the present inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
CPCC02F9/00C02F1/281C02F1/285C02F1/5245C02F1/56C02F1/66
Inventor 黄京袁伟赖力卓俊清
Owner 四川欣欣环保科技有限公司