Reduction of acrylonitrile in wastewater from the production of

Details Reduction of acrylonitrile in wastewater from the production of Reduction of acrylonitrile in wastewater from the production of

1992-09-24

1994-08-02

Upton, Christopher

Liquid purification or separation

Processes

Treatment by living organism

210625, 210626, 210904, 210908, C02F 312

Patent

active

053343131

ABSTRACT:
A process is disclosed for treating wastewater from a polymerization process. The wastewater contains volatile residual monomer, for example acrylonitrile monomer. The method includes the steps of pretreating the wastewater with an amount of oxygenated waste activated sludge to reduce the levels of residual monomer in the wastewater stream in order to reduce the volatilization of the volatile residual monomer into the atmosphere during further treatment of the wastewater stream. Preferably the process involves steps of neutralization, primary clarification, cooling, aeration and secondary clarification to provide a wastewater treatment process that has a minimum of air emissions of residual volatile hydrocarbon monomer and which provides a final treated water effluent that has the desired pH level, temperature, biological oxygen demand and a suspended solids level for emission of the treated water into the environment.

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