摘要：In this study, co-metabolism biodegradation of DCPs was investigated, with glucose as co-metabolism substrate and four DCPs including 2,3-dichlo-rophenol (2,3-DCP), 2,5-dichlorophenol (2,5-DCP),3.4- dichlorophenol (3,4-DCP) and 3,5-dichlorophe-nol (3,5-DCP) as target pollutants. The results showed that glucose could accelerate the biodegradation process of DCPs due to the reasons that glucose could enhance the microorganisms, adaptability towards DCPs as a co-metabolism substrate in the activated sludge and speed up the acclimation process of DCPs high-efficiency degradation strains, which indirectly improved the biodegradation rate of DCPs in activated sludge. Through 80 days of acclimatization, the microorganisms were able to degrade 6.5mg L1 2,3-DCP，7.5mg L1 2,5-DCP，6.3mg L13.4- DCP and 7.2 mg L"1 3,5-DCP in different bioreactors, respectively. With the stepwise improvement of glucose feed concentration, the biodegradation rate of DCPs changed gradually. The glucose influent concentrations of 1000 mg L1, 1200 mg L1, 1000 mg L1 and 1200 mg L1 were selected as optimal experimental value, respectively. Under these conditions, biodegradation concentrations of 2,3-DCP, 2,5-DCP, 3,4-DCP and 3,5-DCP with the initial concentration of 15mg L1 reached up tol 1.6 mg L_12.3 mg L"1, 11.5 mg L"1 and 10.6 mg L"1, correspondingly. Combination with DCPs structure and effect of each DCP on microorganisms, results also demonstrated that the meta- and />ara-substituted CPs were of greater toxicity than the or^^o-substitut-eds’.
