The effects of potentially important factors on the rate and extent of degradation of chlorophenols (CPs) by anaerobic sludge granules were examined. The sludge granules were limited in their ability to degrade, via reductive halogenation, the CPs tested and were not capable of mineralization of CPs with meta- or para-chlorine substituents. The initial concentration affected the rate and extent of dechlorination while temperature affected the rate of dechlorination. Addition of electron donors or acceptors also did not increase the extent of degradation.
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