Effect of carbon source and COD/NO_3^--N ratio on anaerobic simultaneous denitrification and methanogenesis for high-strength wastewater treatment(ENVIRONMENTAL BIOTECHNOLOGY)
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概要
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The effect of carbon source and COD/NO_3^--N ratio on denitrification and methanogenesis in mixed methanogenic matrix was investigated in this study. Industrial wastewater, anaerobic treated cassava stillage (CS) and glucose synthetic wastewater were used as carbon sources respectively for comparison. Experimental results showed that denitrification was the main nitrate reduction pathway for all COD/NO_3^--N ratios tested in two substrates. Simultaneous denitrification and methanogenesis occurred at COD/NO_3^--N higher than 7 regardless of carbon sources. Incomplete denitrification was observed at COD/NO_3^--N ratio below 7 in both the anaerobic effluent of CS and glucose-fed cultures due to the insufficient available organic carbon. The nature of carbon sources was observed to play a key role in the nitrate and organic carbon utilization rates. COD/NO_3^--N ratio had a strong effect on the organic matter utilization pathways. Methanization consumed more organic matter than denitrification with further increase of COD/NO_3^--Nratio above 7 in two substrates. Results of VFA variation suggested that propionate and butyrate were preferably utilized by the denitrifiers than acetate.
著者
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Xie Li
State Key Laboratory of Pollution Control and Resource Reuse (Tongji University)
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Wang Rui
State Key Laboratory Of Biotherapy West China Hospital West China Medical School Sichuan University
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Zhou Qi
State Key Lab. Of Pollution Control And Resource Reuse (tongji University) Siping Road No. 1239 Shan
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Zhou Qi
State Key Laboratory Of Pollution Control And Resources Reuse Tongji University
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Xie Li
State Key Laboratory Of Pollution Control And Resources Reuse Tongji University
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Wang Rui
State Key Laboratory Of Pollution Control And Resources Reuse Tongji University
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Chen Jinrong
State Key Laboratory of Pollution Control and Resources Reuse, Tongji University
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- Effect of carbon source and COD/NO_3^--N ratio on anaerobic simultaneous denitrification and methanogenesis for high-strength wastewater treatment