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Process for separatinghigh-concentration waste liquid withnanofiltration membrane

A nanofiltration membrane and high-concentration technology, which is applied in the separation process of high-concentration waste liquid nanofiltration membranes, can solve the problems of high cost, low treatment efficiency, secondary pollution, etc. low cost effect

Inactive Publication Date: 2018-02-02
安徽名创新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a separation process of high-concentration waste liquid nanofiltration membrane, which solves the problems of low treatment efficiency, high cost and easy to cause secondary pollution in the existing wastewater treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] S1. Collect the high-concentration waste liquid to be treated in the waste water collector;

[0026] S2. Add an aqueous flocculant solution with a mass ratio of 0.1:20 to the wastewater collector into the waste water collector. The aqueous flocculant solution is composed of cationic polyacrylamide, nonionic polyacrylamide, polymeric chlorine One of aluminum chloride, ferric chloride or aluminum ferric sulfate aqueous solution;

[0027] S3, turn on the mixer, carry out the stirring speed of 30r / min, the stirring time is 15min;

[0028] S4, leave the stirred solution for 4 hours, and wait for the flocs to settle to the bottom of the container;

[0029] S5. Remove suspended particles, flocs and acrylonitrile oligomers in the waste water after flocculation treatment through a microfiltration membrane or an ultrafiltration membrane to obtain a filtrate. The microfiltration membrane or ultrafiltration membrane material is polyvinylidene fluoride Ethylene or polyacrylonitril...

Embodiment 2

[0035] S1. Collect the high-concentration waste liquid to be treated in the waste water collector;

[0036] S2. Add an aqueous flocculant solution with a mass ratio of 1:20 to the waste water into the waste water collector, the aqueous flocculant solution is composed of cationic polyacrylamide and nonionic polyacrylamide aqueous solution with a mass concentration of 0.1%-3%, Composition of polyaluminum chloride and ferric chloride aqueous solution or ferric chloride and aluminum ferric sulfate aqueous solution;

[0037] S3, turn on the stirrer, carry out the stirring speed of 150r / min, the stirring time is 30min;

[0038] S4, leave the stirred solution for 6 hours, and wait for the flocs to settle to the bottom of the container;

[0039] S5. Remove suspended particles, flocs and acrylonitrile oligomers in the waste water after flocculation treatment through a microfiltration membrane or an ultrafiltration membrane to obtain a filtrate. The microfiltration membrane or ultrafil...

Embodiment 3

[0045] S1. Collect the high-concentration waste liquid to be treated in the waste water collector;

[0046] S2. Add an aqueous flocculant solution with a mass ratio of 2:20 to the waste water into the waste water collector, wherein the aqueous flocculant solution is composed of cationic polyacrylamide, non-ionic polyacrylamide and polychlorinated polyacrylamide with a mass concentration of 0.1%-3%. Composition of aluminum aqueous solution or polyaluminum chloride, ferric chloride and aluminum ferric sulfate aqueous solution;

[0047] S3, turn on the mixer, carry out the stirring speed of 300r / min, the stirring time is 45min;

[0048] S4, leave the stirred solution for 8 hours, and wait for the flocs to settle to the bottom of the container;

[0049] S5. Remove suspended particles, flocs and acrylonitrile oligomers in the waste water after flocculation treatment through a microfiltration membrane or an ultrafiltration membrane to obtain a filtrate. The microfiltration membrane...

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PUM

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Abstract

The invention discloses a process for separating ahigh-concentration waste liquid with a nanofiltration membrane. The process comprises the following steps of adding an aqueous flocculant solution with a mass ratio of 0.1 - 3: 20 relative to waste water to a waste water collector; carrying out a stirring treatment; standing the solution for 4 - 12h until flocs settle to the bottom of a container;removing oligomers in the wastewaterafter flocculation of the waste water through a microfiltration membrane or an ultrafiltration membraneto obtain filtrate; carrying out a first nanofiltration membrane treatment; ang carrying out a second nanofiltration membrane treatment to obtain concentrate. The process for separatingthe high-concentration waste liquid with the nanofiltration membrane can effectively trap charged oligomers in the waste water through the nanofiltration membrane without polluting the membrane and can effectively reduce components in the waste water through the first nanofiltration membrane treatment and the second nanofiltration membrane treatment, improves the concentration of the wastewater, has the advantages of being high in treatment efficiency and low in processing cost, is beneficial to the treatment of the wastewater, makes the wastewater meet emission standards, achieves the green circulation of industrial water and reduces the cost of the enterprise.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment and relates to a separation process of high-concentration waste liquid nanofiltration membrane. Background technique [0002] Industrial wastewater contains a large amount of toxic and harmful substances such as phenols, hydrocarbons, oil, and heavy metals. Organic pollutants in wastewater include phenols, polycyclic aromatic compounds, and heterocyclic compounds containing nitrogen, oxygen, and sulfur. Industrial wastewater with refractory organic matter. [0003] With the use of membrane separation technology for industrial wastewater treatment at home and abroad, most of the nanofiltration membrane treatment processes are mainly for pure water treatment and water supply treatment. The pore size of the nanofiltration membrane is above 1nm, generally 1-2nm, which allows solvent molecules Or a functional semi-permeable membrane through which some low-molecular-weight solutes or low-...

Claims

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Application Information

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IPC IPC(8): C02F1/44B01D61/02C02F9/04B01D63/08B01D63/10
CPCC02F1/442B01D61/027B01D63/08B01D63/10C02F1/441C02F1/444C02F1/52C02F9/00C02F2301/08
Inventor 黄智锋杨家奎康玲郭涛
Owner 安徽名创新材料科技有限公司