COD removal of phenolic wastewater by biological activated carbon-sequencing batch reactor in the presence of 2,4-DCP

Treatment performance of COD in the presence of 2,4-dichlorophenol (2,4-DCP ) was explored by using a biological activated carbon-sequencing batch reac tor (BAC-SBR) system. Two COD levels of basic substrate were synthesized wi th a mixture of phenol and 2,4-dichlorophenol. Although effluent concentrat ion was increased with reduction of sludge retention time (SRT) from 8-days to 3-days, treatment efficiency was indicated more than 90% of COD in all SRTs applied. Reactors operated with acclimated sludge, could be expected t o cope with quite high loading of inhibitory substances.