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ANAEROBIC/AEROBIC BIODEGRADATION OF PENTACHLOROPHENOL USING GAC FLUIDIXED BED REACTORS: OPTIMIZATION OF THE EMPTY BED CONTACT TIME
Citation:
Wilson, G. J., A. P. Khodadoust, M. T. Suidan, R C. Brenner*, AND C M. Acheson*. ANAEROBIC/AEROBIC BIODEGRADATION OF PENTACHLOROPHENOL USING GAC FLUIDIXED BED REACTORS: OPTIMIZATION OF THE EMPTY BED CONTACT TIME. Wilderer, P. (ed.), WATER SCIENCE TECHNOLOGY. Elsevier Science Ltd, London, Uk, 38(7):9-17, (1998).
Description:
An integrated reactor system has been developed to remediate pentachlorophenol (PCP) containing wastes using sequential anaerobic and aerobic biodegradation. Anaerobically, PCP was degraded to approximately equimolar concentrations (>99%) of chlorophenol (CP) in a granular activated carbon (GAC) fluidized bed reactor (FBR) at empty bed contact times (EBCTs) ranging from 18.6 to 2.3 hr. However, at lower EBCTs, chlorophenol concentations decreased to less than 10% of the influent PCP concentration. The optimal EBCT was determined to be 2.3 hr based on PCP conversion to CPs and stable reactor operation. Decreasing the EBDT fourfold did not inhibit degradation of PCP and its intermediates, and thus, removal of PCP is possible at lower detention times providing significant cost advantage.