期刊
WATER ENVIRONMENT RESEARCH
卷 91, 期 3, 页码 185-197出版社
WILEY
DOI: 10.1002/wer.1016
关键词
acetate; anammox; denitratation; final polishing; glycerol; methanol; shortcut nitrogen removal
资金
- District of Columbia Water and Sewer Authority (DC Water), Washington, DC
In this study, concurrent operation of anammox and partial denitrification within a nonacclimated mixed culture system was proposed. The impact of carbon sources (acetate, glycerol, methanol, and ethanol) and COD/NO3(-)-N ratio on partial denitrification selection under both short- and long-term operations were investigated. Results from short-term testing showed that all carbon sources supported partial denitrification. However, acetate and glycerol were preferred due to their display of efficient partial denitrification selection, which may be related to their different electron transport pathways in comparison with methanol. Long-term operation confirmed results of batch tests by showing the contribution of partial denitrification to nitrate removal above 90% after acclimation in both acetate and glycerol reactors. In contrast, methanol showed challenges of maintaining efficient partial denitrification. COD/NO3(-)-N ratio mainly controlled the rate of nitrate reduction and not directly partial denitrification selection; thus, it should be used to balance between denitrification rate and anammox rate. (C) 2018 Water Environment Federation
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