Method for processing organosilicon waste water

Abstract

The invention relates to a method for processing organosilicon waste water. The method optimizes and combines a preprocessing unit and a biochemistry unit, aiming at the properties of high salt and difficult degradation of the organosilicon waste water. The method can process the organosilicon waste water to the second grade standard of integrated wastewater discharge standard (GB8978-1996). The organosilicon waste water is strongly acidic. A preneutralization pool is arranged at the front end of technological process and neutralizes the PH of the waste water to about 1 to 2. The waste water enters a micro-electrolysis reactor which is filled with micro-electrolysis stuffing. The effluent enters a secondary neutralization pool, and water volume and PH value are adjusted further. The waste water enters a biochemistry processing establishment and at last enters a secondary sedimentation tank. The biochemistry processing system of the waste water comprises a primary oxygen compatibility pool, a primary aerobic pool and a secondary aerobic pool. Microbial flora and relative carriers are added to the pools. The invention has the advantages that the processed organic waste water is guaranteed to meet the specified standard and the processing cost is reduced greatly. The win-win solution of economy and environment is realized.

Description

technical field [0001] The invention belongs to the field of industrial sewage treatment, and relates to a method for treating organosilicon wastewater by adopting a combined biochemical treatment process. Background technique [0002] Since the 1990s, due to the increasingly wide application of new materials such as silicone oil, silicone rubber and silicone resin in silicone products, the global silicone industry has maintained a high-speed development. However, there are many types of organic matter in the wastewater produced by organosilicon production equipment. In addition to methanol and organohalosilane, there are organosilicon intermediates, silicon coupling agents and intermediates, silicone oil, silicone resin, silicone rubber and other high polymers. Inorganic substances are mainly hydrochloric acid and sodium hydroxide. The chemical composition of wastewater is complex, and it is a substance that is difficult to biochemically degrade (except for a small amount ...

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Problems solved by technology

[0003] The characteristics of organic silicon industrial wastewater, such as strong acidity, high toxicity, high salinity, high COD concentration, poor biodegradability, and refractory degradation, make it extremely difficult to treat organic silicon industrial wastewater. At present, the research results of organic silicon industrial wastewater treatment at home and abroad There are few, and a small amount of research mainly focuses on the treatment of organic silicon industrial wastewater by physical and chemical methods, such as steam stripping, iron scrap fluidized bed-catalytic oxidation, Fenton reagent treatment, etc., not only the effect is not very satisfactory, but also the treatment cost is extremely high. There is feasibility of engineering implementation

So far, there is no mature treatment process for organic silicon wastewater at home and abroad.

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