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

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...

AI Technical Summary

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 treated water cannot be guaranteed; 4. Due to multiple pretreatment processes, not only will it be wasted but can be reused resources, and the consumption of medicine and electricity is high, and the long-term operation is also unstable

It can be seen that the existing pre-membrane pretreatment impurity removal technology still has problems such as complex process, low degree of automation, unstable treatment effect, high sludge generation, high operating cost, introduction of other impurities, and short equipment replacement cycle.

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