EFFECTS OF MERCURY ON ANAEROBIC GRANULAR SLUDGE ACTIVITY
In order to understand the toxicity of mercury on the activity of anaerobic granular sludge, the inhibition and rejuvenation effects of mercury ion（Hg2+）on methanogenic production activity of the anaerobic granular sludge was investigated using Smith fermentation method under laboratory condition. The results showed that the Hg2+ had quantitative effect on inhibition of methanogenic production activity of the anaerobic granular sludge. The higher the Hg2+ concentration was, the greater of the inhibition capacity it had. When the Hg2+ concentration was less than 50 mg/l, the activity of anaerobic granular sludge could be easily resumed. However, if the concentration was 100 mg/l, the activity could be mostly resumed. When the concentration was 300 mg/l, the Hg2+ would make an irreversible toxic inhibition on the anaerobic granular sludge. Our results indicated that the anaerobic granular sludge activity was tolerant to Hg2+ up to a concentration of 50 mg/l. Analysis of the amount of coenzyme F420 and extracellular polymeric substances (EPS) of anaerobic granular sludge in different Hg2+ concentrations revealed that Hg2+ had conspicuous effects on the contents of coenzyme F420 and EPS in anaerobic granular sludge. High Hg2+ concentration would cause substantially decline in coenzyme F420 and EPS.
Anaerobic granular sludge Methanogenic activity Coenzyme F420 Eztracellular polymeric substances Mercury ion
Xu Hong-ying Li Ya-xin Wang Mu-hua Su Bin-nan Song Wei
School of Environmental Science and Engineering,Taiyuan University of Technology,Taiyuan,Shanxi,0300 School of Environmental Science and Engineering,Taiyuan University of Technology,Taiyuan,Shanxi,0300 Shanxi Institute of Biology,Taiyuan,Shanxi,030006,China
国际会议
北京
英文
1-4
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）