Wastewater treatment zero-emission technology for chemical enterprise and park

Abstract

The invention discloses a wastewater treatment zero-emission technology for chemical enterprise and park. According to the technology disclosed by the invention, the desalted water and the circulatingwater are treated by a treatment technology of 'softening precipitation, sand filtration, ultrafiltration and reverse osmosis'; the domestic and production wastewater is subjected to physiochemical and biochemical treatment while the effluent is treated by a treatment technology of 'sand filtration, ultrafiltration and reverse osmosis'; after that, the concentrated water after the two treatment is treated by a treatment technology of 'catalytic oxidation, membrane treatment, electrodialysis and the like'; the treated water is partially recycled by the enterprise while the rest part is discharged up to standard. According to the technology disclosed by the invention, the wastewater of different natures is treated separately according to the nature; by organically combining a chemical watertreatment technology, a membrane water treatment technology and an evaporation technology, the process flow is clear, the operation is simple and convenient, the recycling rate of the system is high,and the problems of difficult treatment of mixed wastewater and high water consumption of the enterprise are solved in the chemical enterprise and park. The technology disclosed by the invention hashigh recycling rate and realizes zero-emission treatment on water.

Description

technical field [0001] The invention relates to a zero-discharge process for treating wastewater in chemical enterprises and industrial parks. Background technique [0002] The composition of wastewater from chemical enterprises and parks is complex. The wastewater has high pollutant content, contains a variety of toxic and harmful and biodegradable substances, has low B / C ratio, poor biodegradability and is not easy to purify, and has a certain accumulation in organisms. If treated Improper pollution of water bodies is immeasurable. The wastewater treatment process of chemical enterprises and parks mainly deals with two types of wastewater, one is desalted water and circulating water sewage, this type of wastewater has high salt content, high hardness, high alkalinity, large water volume, and organic pollutants such as CODcr and ammonia nitrogen Pollutants with low concentration; the other type is wastewater generated from production and life, which contains high concentra...

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Problems solved by technology

[0002] The composition of wastewater from chemical enterprises and parks is complex. The wastewater has high pollutant content, contains a variety of toxic and harmful and biodegradable substances, has low B / C ratio, poor biodegradability and is not easy to purify, and has a certain accumulation in organisms. If treated Improper pollution of water bodies is immeasurable

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