Epichlorohydrin production wastewater comes from the drainage of various devices, waste gas treatment wastewater, equipment and floor cleaning wastewater, etc. This type of industrial wastewater contains a large amount of chloride ions and organic matter, and a large amount of chloride ions need to be processed first, and then biochemical treatment.
Several Processes of Epichlorohydrin Wastewater Treatment
Evaporative concentration
Through the direct contact evaporation of epichlorohydrin production wastewater and high-temperature hot air, the epichlorohydrin production wastewater is separated from the waste solids in the water. Solid-liquid separation of soluble suspended solids with high organic pollution content in the liquid and not easy to biochemical degradation or high hardness in the liquid is prone to scaling tendency, but the evaporation energy consumption is large and the cost is high.
Iron-carbon micro-electrolysis
The iron-carbon micro-electrolysis treatment method mainly uses the corrosion principle of metal to form a primary battery, establishes a reaction pool, and treats the organic matter in the pool. “During the reaction process, the condition of iron element through electrolysis changes from zero valence state to divalent iron ion. At this time, iron Ions have strong adsorption properties, which can attract charged particles existing in organic matter, and gradually form iron sludge, which has obvious removal effect on large particles of organic matter in epichlorohydrin production wastewater.
Coagulation and sedimentation
Add PAC and PAM to the coagulation sedimentation tank and stir to make PAC and PAM diffuse into the whole water quickly and evenly to create good polymerization conditions, and coagulate by the Brownian motion of particles and turbulent water flow to form fine alum flowers. Larger particles or flocs are formed due to agglomeration or aggregation and overlap due to collision with each other, so that the foul python is easier to sink and be removed naturally.
Hydrolysis and acidification
Hydrolysis and acidification is mainly used in the sewage treatment process with high organic matter concentration and high SS, and is a relatively important process. During this period, macromolecular pollutants in the treatment of epichlorohydrin production wastewater were converted into small molecular pollutants, and the biodegradability of epichlorohydrin production wastewater treatment was improved, laying good reaction conditions for the subsequent treatment process.
Contact oxidation method
The contact oxidation method is a wastewater biological treatment method derived from the biofilm method, that is, a certain amount of filler is filled in the biological contact oxidation tank, and the biofilm attached to the filler and the sufficient supply of oxygen are used. Oxidative decomposition of organic matter in epichlorohydrin production wastewater to achieve purification purposes.
The above are part of the treatment process of epichlorohydrin production wastewater, and the specific implementation is designed according to the actual situation of the enterprise.
Related reading links
View Epichlorohydrin product page
View Epichlorohydrin Wikipedia