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Effect of carbon source and COD/NO3−–N ratio on anaerobic simultaneous denitrification and methanogenesis for high-strength wastewater treatment

Paper ID Volume ID Publish Year Pages File Format Full-Text
21212 43211 2012 6 PDF Available
Title
Effect of carbon source and COD/NO3−–N ratio on anaerobic simultaneous denitrification and methanogenesis for high-strength wastewater treatment
Abstract

The effect of carbon source and COD/NO3−–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/NO3−–N ratios tested in two substrates. Simultaneous denitrification and methanogenesis occurred at COD/NO3−–N higher than 7 regardless of carbon sources. Incomplete denitrification was observed at COD/NO3−–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/NO3−–N ratio had a strong effect on the organic matter utilization pathways. Methanization consumed more organic matter than denitrification with further increase of COD/NO3−–N ratio above 7 in two substrates. Results of VFA variation suggested that propionate and butyrate were preferably utilized by the denitrifiers than acetate.

Keywords
Denitrification; Methanogenesis; COD/NO3−–N ratio; Carbon source; Inhibition
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Effect of carbon source and COD/NO3−–N ratio on anaerobic simultaneous denitrification and methanogenesis for high-strength wastewater treatment
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Bioscience and Bioengineering - Volume 113, Issue 6, June 2012, Pages 759–764
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us