[Treatment of a 2,4-dichlorophenol contaminated wastewater in an air-lift inner-loop bioreactor].
An air lift inner-loop bioreactor packed with honeycomb-like ceramic carrier was immobilized with a 2,4-Dichlorophenol-degrading pure culture and was investigated to degrade 2,4-Dichlorophenol and phenol. In fed-batch operation mode, 2,4-DCP biodegradation rate increased with run numbers and followed zero-order kinetics model when it existed alone, but when 2,4-DCP was present in the mixture with phenol, phenol degradation rate had an apparent trend to increase whereas 2,4-DCP removal rate became slower and slower. In continuous operation, 2,4-DCP at the concentration ranged from 6.9 to 102.4 mg/L could be degraded well at the dilution rate of 0.16 h-1 and the average removal percentage was 96.5%. Carbon sources changed from 2,4-DCP to acetate sodium and peptone in the course of operation for 12 days did not cause the bacteria loss the DCP-degrading ability.
Quan
Xiangchun
X
State Key Joint Laboratory of Environment Simulation and Pollution Control, Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China.
Zhang
Yongming
Y
Wang
Jianlong
J
Shi
Hanchang
H
Qian
Yi
Y
D001673:Biodegradation, Environmental; D019149:Bioreactors; D002733:Chlorophenols / Q000378:metabolism*; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000378:metabolism*; D018508:Water Purification / Q000379:methods*
D002733:Chlorophenols; D014874:Water Pollutants, Chemical; C004762:2,4-dichlorophenol