Wastewater pre-membrane pretreatment device and pre-membrane pretreatment method

A pretreatment device and pretreatment technology, which are applied in water/sewage treatment, water treatment parameter control, chemical instruments and methods, etc., can solve the problems of wasting recyclable resources, producing a lot of sludge, and low degree of automation. The effect of ensuring product water quality, ensuring product water quality and improving efficiency

Pending Publication Date: 2022-05-27
HANGZHOU WATER TREATMENT TECH DEV CENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current pre-membrane pretreatment process has the following problems: 1. It needs to use a large amount of impurity removal agents, oxidants or catalysts, etc., which will generate a large amount of sludge and bring in other impurities; 2. The operation process is complicated and cumbersome, and it is difficult to deal with wastewater of different water quality ; 3. To treat wastewater with high salinity and/or high organic pollutants, the removal effect of pollutants and impurities is low, and the quality of the tr

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  • Wastewater pre-membrane pretreatment device and pre-membrane pretreatment method

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Embodiment 1

[0053] In this embodiment, in the membrane pretreatment device used, the first group of electrodes installed in the electrochemical reaction cell is a plate-type noble metal coating electrode-graphite electrode, and the second group of electrodes is a cylindrical iron electrode-stainless steel electrode, and the separation electrodialysis The cathode and anode of the device are alternately stacked with monovalent selective positive membranes and negative membranes of composite hydrophilic mesh, and the hydrophilic mesh compounded on the negative membrane faces the cathode; the turbidity of the treated industrial wastewater is 39NTU, and the hardness is 2065mg / L, COD is 1040mg / L, silicon-containing compound content is 136mg / L, and copper ion content is 182mg / L.

[0054] Step S1, pass the industrial wastewater into the electrochemical reaction tank, adjust the pH value in the electrochemical reaction tank to 5, and energize the first group of electrodes and the second group of el...

Embodiment 2

[0058] In this embodiment, in the membrane pretreatment device used, the first group of electrodes installed in the electrochemical reaction cell is a plate-type precious metal coating electrode-graphite electrode, the second group of electrodes is a plate-type aluminum electrode-stainless steel electrode, and the separation electrodialyzer The monovalent selective positive membrane and the negative membrane of the composite hydrophilic mesh are alternately stacked between the cathode and the anode, and the hydrophilic mesh compounded on the negative membrane faces the cathode; the turbidity of the treated industrial wastewater is 67NTU and the hardness is 370mg / L, COD is 217mg / L, silicon-containing compound content is 129mg / L, and nickel ion content is 95mg / L.

[0059] Step S1, passing the industrial wastewater into the electrochemical reaction tank, adjusting the pH value in the electrochemical reaction tank to 6.5, energizing the second group of electrodes separately to car...

Embodiment 3

[0063] In this embodiment, in the membrane pretreatment device used, the first group of electrodes installed in the electrochemical reaction cell is a cylindrical noble metal coating electrode-graphite electrode, and the second group of electrodes is a plate-type aluminum electrode-stainless steel electrode, and the separation electrodialysis The cathode and anode of the device are alternately stacked with monovalent selective positive membranes and negative membranes of composite hydrophilic mesh, and the hydrophilic mesh composited on the negative membrane faces the cathode; the turbidity of the treated industrial wastewater is 42NTU, and the hardness is 548mg / L, COD is 469mg / L, silicon-containing compound content is 45mg / L, and iron ion content is 50mg / L.

[0064] Step S1, passing the industrial wastewater into the electrochemical reaction tank, adjusting the pH value in the electrochemical reaction tank to 7, energizing the first group of electrodes separately to carry out ...

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Abstract

The invention provides a wastewater membrane pretreatment device which comprises an electrochemical reaction tank and a salt separation electrodialyzer, two groups of electrodes are mounted in the electrochemical reaction tank; in the first group of electrodes, the anode is a noble metal coating electrode, and the cathode is one of a graphite electrode, a titanium electrode and a stainless steel electrode; in the second group of electrodes, the anode is an iron electrode or an aluminum electrode, and the cathode is a stainless steel electrode or a graphite electrode. A wastewater inlet and a produced water outlet are formed in the electrochemical reaction tank; the wastewater inlet is used for introducing industrial wastewater, the produced water outlet is communicated with an inlet of a thin liquid chamber of the salt-separating electrodialyzer, an outlet of the thin liquid chamber of the salt-separating electrodialyzer is communicated with the wastewater inlet, and liquid discharged from an outlet of a thick liquid chamber of the salt-separating electrodialyzer is impurity-removed water subjected to membrane pretreatment. The structure is simple, wastewater of different water qualities can be treated, and impurities in the wastewater can be efficiently removed with low consumption. The invention also provides a wastewater membrane pretreatment method.

Description

technical field [0001] The invention relates to the technical field of waste water treatment, in particular to a pre-treatment device and a pre-membrane pre-treatment method for waste water membranes. Background technique [0002] In recent years, with the rapid development of chemical industry, printing and dyeing, papermaking, medicine, battery, steel, electroplating and other industries, a large amount of waste water is produced in industrial production, and the ecological environment is facing a huge threat. The development of industrial wastewater in-depth treatment and reuse technology and the development of high-efficiency and low-consumption wastewater recycling technology and equipment are the keys to reducing pollutant emissions in various industries and improving the level of clean and environmentally friendly production. It is of great significance for my country to promote industrial energy conservation and carbon reduction. [0003] Membrane separation technolo...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/469
CPCC02F1/46109C02F1/4695C02F2209/06
Inventor 祝海涛吴雅琴杨波
Owner HANGZHOU WATER TREATMENT TECH DEV CENT
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