Abstract: The study showed that after inoculating 10 g·kg^-1 anaerobic dechlorinated granular sludge (ADGS) for 31 days,the biodegradation rate of pentachlorophenol (PCP) in solid-liquid phase of contaminated sediment slurry was up to 98.9%,with an average of 8.0 mg·kg^-1·d^-1,while that of the control was only 4.4 mg·kg^-1·d^-1.As the regulation factors in slurry remediation,organic solvent,co-substrate and surfactant had different effects on PCP degradation.The addition of ethanol could enhance the desorption and degradation of PCP,the degradation rate being up to 54.3 mg·kg^-1·d^-1 within 4 days,while the addition of co-substrate and nonionic surfactant EGME (ethylene glycol monobutyl-ether) inhibited the PCP degradation in solid- liquid phase of slurry.

Key words: Brachionus angularis, Strain, Developmental period (De), Pre-reproductive period (Dp), Body size, Egg size