期刊
CHEMOSPHERE
卷 235, 期 -, 页码 336-343出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2019.06.175
关键词
Partial nitrification; Anammox; Endogenous denitrification; Sulfate-reducing ammonia oxidation (SRAO); Sulfate; Nitrogen removal
资金
- Science and Technology Opening Cooperation Project of Henan Province [182106000010]
- National Natural Science Foundation of China [NSFC: 41701569]
A nitrogen removal system integrating partial nitrification, anaerobic ammonium oxidation (Anammox) and endogenous denitrification (PAED) was established in a sequencing batch reactor (SBR) for treating low nitrogen sewage (approximately 40 mg L-1 ammonia-nitrogen). The impact of sulfate on PAED sludge was investigated in five identical SBRs, fed with different levels of sulfate (0, 50, 100, 200 and 400 mg L-1). Ammonia oxidation was improved by the addition of Results showed that the sulfate addition in low concentration of sulfate (<= 50 mg L-1), but was profoundly suppressed by higher levels of sulfate. Sulfate feeding enhanced both total nitrogen removal by Anammox and endogenous denitrification, with the abundance of Candidatus Kuenenia increasing to 4.39% in 400 mg L-1 sulfate from 0.83% in the control reactor, and Denitratisoma increasing to 6.35% from 2.77%. The results proved the feasibility of the PAED system in treating low nitrogen sewage with sulfate, which also enhanced the nitrogen sulfate interaction. (C) 2019 Elsevier Ltd. All rights reserved.
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