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.