Pretreatment process of organic silicon wastewater

Abstract

The invention discloses a pretreatment process of organic silicon wastewater, comprising the steps of homogeneous treatment, slag removal, oil removal, iron-carbon micro-electrolysis process, Fenton process, neutralization deposition and overflow and discharge of supernate. Aiming at the strong acid characteristic of the organic silicon wastewater, the iron-carbon micro-electrolysis can be directly carried out after the homogeneous impurity removal; partial COD (Chemical Oxygen Demand) can be degraded while the biochemical quality of the wastewater is improved and the pH value is improved; then hydrogen peroxide is directly added to form a Fenton system; a strong oxidant is formed to damage the structure of organic matters and chromophonic groups in the wastewater and effectively oxidize so as to remove the organic matters which are difficult to degrade and cannot be removed by the traditional wastewater treatment technology, and thereby the aims of further reducing the COD and improving the biodegradability of the wastewater can be improved. The organic silicon wastewater can reach the national third-grade discharge standard after being subjected to neutralization and the precipitation and reach the national first-grade discharge standard after being subjected to biochemical treatment. The pretreatment process has the advantages of low cost and stable treatment effect and is simple for operation.

Description

technical field [0001] The invention relates to a pretreatment process of wastewater, in particular to a pretreatment process of organic silicon wastewater, which belongs to the field of industrial sewage treatment. 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, 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, research on the treatment of organic silicon industrial wastewater at home and abroad There are few results, and there is no mature treatment process for organic silicon wastewater. [0003] The production of organosilicon monomer...

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Problems solved by technology

[0006] However, this method still has imperfections, so that the iron-carbon micro-electrolysis treatment process cannot achieve a better treatment effect, and the organic silicon wastewater is treated by the micro-electrolysis process, although part of the COD can be removed, but due to the iron-carbon electrochemical reaction redox The capacity is limited, and some refractory organic substances cannot be decomposed. At the same time, the treatment cost needs to be reduced and the operation needs to be simplified.

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