Non-ferrous metal raffinate pretreatment method before membrane pretreatment

A non-ferrous metal, pretreatment technology, applied in the direction of special treatment targets, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of poor effect of trace organic matter, and achieve the goal of eliminating complex water quality and secondary pollution, and increasing salinity , Improve the effect of effluent water quality

Pending Publication Date: 2019-02-01
云南同硕环保科技有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to propose a method for efficiently removing trace organic substances and other substances remaining in raffinate wastewater without introducing new Chemical substances, providing technical support for subsequent membrane advanced treatment and effluent reuse

Method used

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  • Non-ferrous metal raffinate pretreatment method before membrane pretreatment

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Effect test

Embodiment 1

[0024] Embodiment 1: as figure 1 As shown, the concrete steps of the pre-membrane pretreatment method of the non-ferrous metal extraction raffinate are as follows:

[0025] (1) Pretreat the raffinate wastewater, separate and remove the remaining suspended oil through filtration, etc., and adjust the pH value to 1.5;

[0026] (2) Put coconut shell ultrafine powder activated carbon with a particle size of 0.05 μm into the pretreated extraction wastewater, stir to make the ultrafine powder activated carbon fully contact with the extraction wastewater, and perform static adsorption through ultrafine powder activated carbon. Powdered activated carbon selectively adsorbs and extracts macromolecular organic pollutants in wastewater, and separates solids and liquids after adsorption saturation; the static adsorption reaction conditions are that the wastewater temperature is 5°C, the adsorption contact reaction time is 1min, and the mixer is used for mechanical stirring at a stirring s...

Embodiment 2

[0029] Embodiment 2: as figure 1 As shown, the concrete steps of the pre-membrane pretreatment method of the non-ferrous metal extraction raffinate are as follows:

[0030] (1) Pretreat the raffinate wastewater, separate and remove the remaining suspended oil through filtration, etc., and adjust the pH value to 7;

[0031] (2) Put coconut shell ultrafine powder activated carbon with a particle size of 0.5 μm into the pretreated extraction wastewater, stir to make the ultrafine powder activated carbon fully contact with the extraction wastewater, and perform static adsorption through ultrafine powder activated carbon. Powdered activated carbon selectively adsorbs and extracts macromolecular organic pollutants in wastewater, and separates solids and liquids after adsorption saturation; the static adsorption reaction conditions are that the wastewater temperature is 25 ° C, the adsorption contact reaction time is 10 minutes, and the air is introduced into the air for stirring by ...

Embodiment 3

[0034] Embodiment 3: as figure 1 As shown, the concrete steps of the pre-membrane pretreatment method of the non-ferrous metal extraction raffinate are as follows:

[0035] (1) Pretreat the raffinate wastewater, separate and remove the remaining suspended oil through filtration, etc., and adjust the pH value to 3;

[0036] (2) Put coconut shell ultrafine powder activated carbon with a particle size of 3 μm into the pretreated extraction wastewater, stir to make the ultrafine powder activated carbon fully contact with the extraction wastewater, perform static adsorption through ultrafine powder activated carbon, and use ultrafine powder Activated carbon selectively adsorbs and extracts macromolecular organic pollutants in wastewater, and separates solids and liquids after the adsorption is saturated; the static adsorption reaction conditions are that the wastewater temperature is 20°C, the adsorption contact reaction time is 10 minutes, and the air compressor is used for stirri...

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Abstract

The invention discloses a non-ferrous metal raffinate pretreatment method before membrane pretreatment, and belongs to the technical field of industrial wastewater treatment. The operation steps of the method comprise: 1, degreasing wastewater, and adjusting the pH value; 2, carrying out static adsorption by using ultrafine powdery active carbon, and carrying out solid-liquid separation after achieving a saturated adsorption state; 3, carrying out dynamic adsorption on the ultrafine powdery active carbon adsorption effluent by using granular active carbon; and 4, carrying out deep treatment onthe wastewater by using cellulose acetate filaments, and carrying out deep treatment on the adsorption effluent by using a membrane. According to the present invention, through the selective adsorption of the specific molecular weight organic matter based on the particle size difference in active carbon, and the selective filtration separation property of the cellulose acetate polymer, the selective adsorption separation of the target pollutant is achieved, such that the pollution on the membrane in the subsequent membrane treatment by the target pollutant can be avoided, and the new chemicalis not introduced and the physicochemical properties of the raffinate are not changed so as to provide the technical support for the membrane treatment and reuse of the raffinate.

Description

technical field [0001] The invention relates to a pre-membrane pretreatment method for non-ferrous metal extraction residue, belonging to the technical field of industrial wastewater treatment. Background technique [0002] In the non-ferrous metal recycling industry, extraction methods are widely used to recover valuable metals in the liquid phase. A variety of organic substances remain in the raffinate wastewater after stripping the extraction wastewater, such as kerosene, residual extractant and a small amount of extraction components, etc. Since the country requires zero discharge of wastewater in the non-ferrous metal recycling industry, ultrafiltration and nanofiltration are widely used in enterprises , reverse osmosis and other processes carry out advanced treatment and reuse of raffinate wastewater, but the residual organic matter in the raffinate wastewater will cause serious membrane pollution and pore blockage to the subsequent advanced membrane treatment, which w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28
CPCC02F1/283C02F2303/16
Inventor 余仁勇胡学伟李柳青
Owner 云南同硕环保科技有限公司
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