NDLI: Mechanisms and microbial structure of partial denitrification with high nitrite accumulation

Content Provider	Springer Nature Link
Author	Du, Rui Peng, Yongzhen Cao, Shenbin Li, Baikun Wang, Shuying Niu, Meng
Copyright Year	2015
Abstract	Nitrite (NO2 −-N) accumulation in denitrification can provide the substrate for anammox, an efficient and cost-saving process for nitrogen removal from wastewater. This batch-mode study aimed at achieving high NO2 −-N accumulation over long-term operation with the acetate as sole organic carbon source and elucidating the mechanisms of NO2 −-N accumulation. The results showed that the specific nitrate (NO3 −-N) reduction rate (59.61 mg N VSS−1 h−1 at NO3 −-N of 20 mg/L) was much higher than specific NO2 −-N reduction rate (7.30 mg N VSS−1 h−1 at NO3 −-N of 20 mg/L), and the NO2 −-N accumulation proceeded well at the NO3 −-N to NO2 −-N transformation ratio (NTR) as high as 90 %. NO2 −-N accumulation was barely affected by the ratio of chemical oxygen demand (COD) to NO3 −-N concentration (C/N). With the addition of NO3 −-N, NO2 −-N accumulation occurred and the specific NO2 −-N reduction rate declined to a much lower level compared with the value in the absence of NO3 −-N. This indicated that the denitrifying bacteria in the system preferred to use NO3 −-N as electron acceptor rather than use NO2 −-N. In addition, the Illumina high-throughput sequencing analysis revealed that the genus of Thauera bacteria was dominant in the denitrifying community with high NO2 −-N accumulation and account for 67.25 % of total microorganism. This bacterium might be functional for high NO2 −-N accumulation in the presence of NO3 −-N.
Starting Page	2011
Ending Page	2021
Page Count	11
File Format	PDF
ISSN	01757598
Journal	Applied Microbiology and Biotechnology
Volume Number	100
Issue Number	4
e-ISSN	14320614
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-11-03
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Nitrite accumulation Partial denitrification Anammox Nitrate-to-nitrite transformation ratio Microbial community Microbiology Microbial Genetics and Genomics Biotechnology
Content Type	Text
Resource Type	Article
Subject	Medicine Applied Microbiology and Biotechnology Biotechnology

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Correction to: Mechanisms and microbial structure of partial denitrification with high nitrite accumulation

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