Treatment process for high-concentration liquid crystal wastewater

Abstract

The invention discloses a treatment process for high-concentration liquid crystal wastewater, which comprises wastewater treatment and waste gas treatment in the treating process, wherein the wastewater treating part comprises four workshop sections of pretreatment, biochemical treatment, deep treatment of a membrane and enhanced evaporation treatment of concentrated liquor of the membrane; in the entire process flow, no wastewater is discharged, so that internal circulating utilization is implemented; waste gas treatment comprises two parts of spraying and treatment by a biological purification tower. Pretreatment improves biodegradability of the wastewater; the biochemical workshop section adopts a hydrolytic acidification and aerobiotic mode, so that biodegradability of the wastewater is further improved and most of organisms are further removed. In the waste gas treatment, firstly, microorganism adsorption is carried out by a bioscrubber, the waste gas is subjected to secondary adsorption by the biological purification tower after being discharged from the bioscrubber, and then the waste gas is discharged into atmosphere so as to complete the waste gas treatment process. According to the invention, the process flow of treating the high-concentration liquid crystal wastewater is explored, effective experimental basis is provided for engineering application by experiments, and a set of method for treating high-concentration organic wastewater is formed.

Description

technical field [0001] The invention relates to a treatment process for high-concentration liquid crystal wastewater, which can also be applied to wastewater with the same small water volume, high concentration and poor biodegradability, such as explosives wastewater, pesticide wastewater, chemical wastewater and other fields. Background technique [0002] With the rapid development of the information industry and the electronics industry, liquid crystal displays are more and more widely used in televisions, computer monitors, mobile phones, instruments and other fields, which also produces a large amount of waste water from the production of liquid crystal intermediates. Most of the three wastes in the production of liquid crystal intermediates are mainly waste water, and the main pollutants in the waste water are the organic solvents, reaction by-products and catalysts commonly used in the production process. Monomer liquid crystals are produced by chemical synthesis. Diff...

AI Technical Summary

Problems solved by technology

Monomer liquid crystals are produced by chemical synthesis. Different raw materials are used in the production of different monomer liquid crystals. The organic pollutants in the waste water produced are high in concentration, complex in composition and highly toxic. The main pollutants are toluene, petroleum ether, tetrahydrofuran, Organic pollutants such as acetone, ethanol, and naphthenes are difficult to be degraded by microorganisms, so the treatment is difficult

[0003] At present, there is no mature and effective treatment method for the treatment of liquid crystal intermediate organic wastewater with high concentration and small water volume.

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