Aerobic granulation for 2,4-dichlorophenol biodegradation in a sequencing batch reactor.
Development of aerobic granules for the biological degradation of 2,4-dichlorophenol (2,4-DCP) in a sequencing batch reactor was reported. A key strategy was involving the addition of glucose as a co-substrate and step increase in influent 2,4-DCP concentration. After operation of 39d, stable granules with a diameter range of 1-2mm and a clearly defined shape and appearance were obtained. After granulation, the effluent 2,4-DCP and chemical oxygen demand concentrations were 4.8mgl(-1) and 41mgl(-1), with high removal efficiencies of 94% and 95%, respectively. Specific 2,4-DCP biodegradation rates in the granules followed the Haldane model for substrate inhibition, and peaked at 39.6mg2,4-DCPg(-1)VSS(-1)h(-1) at a 2,4-DCP concentration of 105mgl(-1). Efficient degradation of 2,4-DCP by the aerobic granules suggests their potential application in the treatment of industrial wastewater containing chlorophenols and other inhibitory chemicals.
Wang
Shu-Guang
SG
School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.
Liu
Xian-Wei
XW
Zhang
Hua-Yong
HY
Gong
Wen-Xin
WX
Sun
Xue-Fei
XF
Gao
Bao-Yu
BY
D000332:Aerobiosis; D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology*; D002733:Chlorophenols / Q000737:chemistry*; D005947:Glucose / Q000737:chemistry; D007220:Industrial Waste / Q000032:analysis*; D012722:Sewage / Q000382:microbiology*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods
D002733:Chlorophenols; D007220:Industrial Waste; D012722:Sewage; D005947:Glucose; C004762:2,4-dichlorophenol