Pre-Treatment of Acrylic Fiber Wastewater by Complex Process Made Up of Internal Electrolysis and Fenton Oxidization

In this paper a process of combining internal electrolysis and Fenton was used to pre-treat acrylic fiber wastewater based on investigating the optimization parameters of internal electrolysis and Fenton oxidization. Four kinds of combining processes were studied. Results showed that both the processes of Fenton oxidization next to internal electrolysis and internal electrolysis coupled Fenton oxidization were efficiency. COD of the effluents from these two processes were less than 400 mg.L^-1 with a COD removal of more than 70% and the ratio of BOD/COD enhancing to 0.3, CN^- concentration in effluent less then 0.3 mg.L^-1, meeting bio-treatment requirement steadily. While COD and CN^- concentration and biodegradability of effluents from the processes of internal electrolysis next to Fenton oxidization and both reactions in one reactor could not meet bio- treatment requirement.