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The toxicity of ammonium on methanogenic bacteria in anaerobic granular sludge was investigated using intermittent experiments under the condition of medium temperature of(35±1)℃,with glucose as organic carbon source.The experiment results showed that,when COD was 6000 mg·L-1,the methanogenic bacteria were inhibited at the ammonium concentration of 1500 mg·L-1 with the corresponding IC50 of 4000 mg·L-1 and the periodical maximal methanogenic velocity of 92 mL·h-1,and the average ammonium removal rate was 13.17%.When the high concentration of ammonium was removed,the methanogenic activity recovered in varying degrees,and the smaller the inhibition,the faster the recovery of methanogenic activity of sludge.Furthermore,the results also indicated that,when alkalinity and sludge concentration being enhanced,the toxicity of ammonium on methanogenic bacteria in anaerobic granular sludge decreased.
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Basic Information:
China Classification Code:X703
Citation Information:
[1]YU Fang-fang,WU Jian-dong(College of Environmental Science and Engineering,South China University of Technology,Guangzhou 510006,China).Toxicity Study of Ammonium on Methanogenic Bacteria in Anaerobic Granular Sludge[J].Chemistry ＆ Bioengineering,2008,No.135(04):75-78.
2008-04-25
2008-04-25