Wastewater treatment zero-emission technology for chemical enterprise and park

Abstract

The invention discloses a zero-discharge process for wastewater treatment in chemical enterprises and industrial parks. The process of the invention adopts the "softening sedimentation + sand filtration + ultrafiltration + reverse osmosis" treatment process for desalted water + circulating water, which is beneficial to domestic and production water production. The physical, chemical and biochemical effluent of waste water adopts the treatment process of "sand filtration + ultrafiltration + reverse osmosis"; and then adopts the treatment process of "catalytic oxidation + membrane treatment + electrodialysis and other combinations" for the two streams of concentrated water after treatment, and part of the treated water is Enterprises reuse, and part of the emissions meet the standards. The invention separates and separates waste water of different natures, and adopts the organic combination of chemical water treatment technology, membrane water treatment technology and evaporation technology. The process flow is clear, the operation is simple and convenient, and the system recovery rate is high. And the difficult treatment of mixed wastewater in the park and the large water consumption of enterprises. The process of the invention has a high recovery rate and achieves zero-discharge treatment of 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...

AI Technical Summary

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

Images