Pentachlorophenol Dechlorination in Fluidized-Bed Reactors under Methanogenic Conditions

Autor:	Siwei Zou, Krista M. Anders, John F. Ferguson
Rok vydání:	1999
Předmět:	Chlorophenol chemistry.chemical_compound chemistry Fluidized bed Environmental chemistry Reductive dechlorination Degradation (geology) Substrate (chemistry) Overall performance General Environmental Science Pentachlorophenol
Zdroj:	Bioremediation Journal. 3:93-104
ISSN:	1547-6529 1088-9868
DOI:	10.1080/10889869991219244
Popis:	The reductive dechlorination of chlorophenols was studied in three fluidized-bed reactors (FBRs) with respect to enrichment, pathways, complete dechlorination, and overall performance. The methanogenic consortia, developed by previous researchers in our laboratory, have been further enriched by reducing the ratio of substrate to pentachlorophenol (PCP) and increasing the PCP loading. The performance of the consortia was improved, and complete dechlorination at high PCP loading rates was observed, reaching a PCP loading of 1227 µmol/L d with 99% chlorophenol removal. The dechlorination rates in the reactors for chlorophenol (CP) congeners were obtained and were used to evaluate the performance of the three consortia and to quantitatively estimate the fates of these chlorophenols in the reactors. The consortium with the best performance was further investigated in bottle tests by treatment with heat and metabolic inhibitors to examine chlorophenol degradation and to characterize the CP degraders. The degrad...
Databáze:	OpenAIRE
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