Treatment method of low biochemical urban industrial park sewage

Abstract

The invention discloses a treatment method of low biochemical urban industrial park sewage. The method comprises the following step that the sewage passes through a circular type hybrid hydrolysis acidification reactor, a CASS reactor, a coagulation precipitation pond and a catalysis oxidation pond after being precipitated from a primary precipitation pond. According to the treatment method of the low biochemical urban industrial park sewage, a combined process of 'circular type hybrid hydrolysis acidification-CASS-coagulation precipitation-ozone oxidation' is adopted, a tertiary strengthening thought is adopted, removal of matter difficult in biodegradation is achieved, wherein an efficient circular hybrid hydrolysis acidification reactor is adopted to promote macromolecular organics in water to be hydrolyzed in to small molecule organics, and further the capacity of nitrogen removal by denitrification of organics in the subsequent CASS unit is improved; the coagulation precipitation pond is adopted to strengthen removal of partial organics and phosphorus on the part out of water of the CASS; an ozone oxidation technology is adopted to further strengthen removal of the organics, and the purpose that pollutants out of the water is stably standard is achieved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and relates to a sewage treatment method in urban industrial parks with low biochemical properties, in particular to a treatment method for sewage in urban industrial parks with low biochemical properties including cyclic compound hydrolysis and acidification. Background technique [0002] With the rapid development of my country's economy, many cities and towns have established industrial parks. Most of the factories in the industrial parks pretreat their wastewater in the factory. The pretreated water is mostly wastewater with low biochemical properties, which is characterized by organic matter concentration. Relatively close, but most of them are hardly biodegradable substances. This kind of urban industrial park sewage presents the characteristics of low biochemical degradation ability. For this low-biochemical urban park sewage, at present, China mostly adopts the traditional anaerob...

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Problems solved by technology

There are chemical or biochemical methods to improve the biochemical properties. The biochemical hydrolysis method is more commonly used. However, the traditional biochemical hydrolysis method is to set fillers in the wastewater, which has poor mass transfer effect. It is necessary to adopt a hydrolysis acidification pretreatment method with a good flow state effect to improve the wastewater. Biochemical

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