Abstract
Abstract Anaerobic granular sludge from Upflow Anaerobic Sludge Bed (UASB) reactors contain a complete consortia of anaerobic microorganisms in an optimal spatial configuration. The importance of the spatial relationship of microbes in anaerobic granular sludge versus increased surface area (granules vs. free cells) as it pertains to biosorption and microbial toxicity is unknown. In this study, biosorption isotherms are reported for pentachlorophenol (PCP), using granular and dispersed anaerobic sludge from five different industrial sources. Pentachlorophenol biosorption data fit well to the Freundlich equation. There is no significant difference in biosorption capacity between dispersed and granular anaerobic sludge. Some variation in biosorption capacity is observed among the different industrial sources of sludge. Comparison with results reported by other investigators suggests that biosorption by anaerobic biomass is lower than that by aerobic microorganisms.
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