[Biological reduction of perchlorate and optimization].
The potential of bioremediation to treat perchlorate-contaminated water by acclimating anaerobic activated sludge was investigated in this study. Factors such as carbon source, initial pH, temperature, domesticated sludge concentration and dissolved oxygen affecting the removal of perchlorate were studied in detail by shaking-bottle point tests using acetate as carbon source. Results showed that 50 mg/L perchlorate was completely reduced by 1.0 g of domesticated sludge added with 1.2 g/L of acetate under the conditions of 35 degrees C and initial pH 8.0. Dissolved oxygen in the system would restrain the reduction of perchlorate. In addition, column bioreactor was used to treat perchlorate continuously, with the minimum residence time of 6 h.
Qian
Hui-Jing
HJ
Department of Environmental Engineering, Zhejiang University, Hangzhou 310027, China. huijingqian@163.com
Xi
Sheng-Lan
SL
He
Ping
P
Xu
Xin-Hua
XH
D001419:Bacteria / Q000378:metabolism; D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology*; D010472:Perchlorates / Q000302:isolation & purification*; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
D010472:Perchlorates; D014874:Water Pollutants, Chemical; C494474:perchlorate