Treatment of 4-chlorophenol by a coupled Fenton-biological fluidized bed process
对氯酚经Fenton体系预降解后的生物流化床处理

A gas liquid solid three-phase fluidized bed in which biomass was supported on activated carbon was employed to treat 4-CP (4-chlorophenol)-containing effluent using a Fenton system. The degradation of 4-CP and the formation of intermediates under various Fenton reagents in the Fenton system were investigated, and then the appropriate Fenton reagent input was obtained by comparing the biodegradability of the effluent. The biological fluidized bed ran stably after adaptation and immobilization. The effect of residence time (RT) and pH on CODCr removal, and the resistance to impact on the reactor were investigated. When 83% of the benzene ring was cleaved by the Fenton system, the combined Fenton-biological fluidized bed process achieved a good performance. The remaining aromatics and most of the organic acids were degraded in the biological fluidized bed and CODCr in the effluent was below 100 mg·L-1. The Fenton-biological fluidized bed coupled process is a promising technology for wastewater treatment.