Basu Debolina, Gupta S K
Centre for Environmental Science and Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India.
Bioresour Technol. 2010 Jan;101(1):21-5. doi: 10.1016/j.biortech.2009.06.074. Epub 2009 Aug 20.
This study examines the performance of bench-scale Upflow Anaerobic Sludge Blanket (UASB) reactor in treating simulated wastewaters containing 1,1,2,2-tetrachloroethane (TeCA). Reactors R1 (control) and R2 (containing TeCA) were operated at Hydraulic Retention Times (HRTs) of 36, 30, 24, 18 and 12 h. The removal of TeCA decreased from 99.85% to 98.40% as the HRT was lowered down from 36 to 12 h. The maximum TeCA dechlorination rate and the half velocity coefficient were 0.2 d(-1) and 18.58 mg TeCA/l, respectively. The Organic Loading Rate (OLR) was varied from 1.5 to 3.1 kg/m(3)/d to yield various substrate:co-substrate ratios and the overall removal of TeCA throughout this study was more than 99%. The average effluent TeCA concentration at optimum HRT (24 h) and substrate:co-substrate ratio (100:1) was less than 0.1 mg/l. The granules within the reactor were 0.1-3.2 mm in size with a heterogeneous bacterial population.
本研究考察了实验室规模的上流式厌氧污泥床（UASB）反应器处理含1,1,2,2-四氯乙烷（TeCA）模拟废水的性能。反应器R1（对照）和R2（含TeCA）在水力停留时间（HRT）为36、30、24、18和12小时的条件下运行。随着HRT从36小时降至12小时，TeCA的去除率从99.85%降至98.40%。TeCA的最大脱氯速率和半速度系数分别为0.2 d(-1)和18.58 mg TeCA/l。有机负荷率（OLR）在1.5至3.1 kg/m(3)/d之间变化，以产生不同的底物：共底物比率，在整个研究过程中TeCA的总去除率超过99%。在最佳HRT（24小时）和底物：共底物比率（100:1）下，出水TeCA的平均浓度低于0.1 mg/l。反应器内的颗粒大小为0.1 - 3.2毫米，细菌种群具有异质性。
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