TY - JOUR
T1 - The influence of phosphorus on the autotrophic and mixotrophic denitrification
AU - Fan, Chunzhen
AU - Wang, Peiqi
AU - Zhou, Weili
AU - Wu, Suqing
AU - He, Shengbing
AU - Huang, Jungchen
AU - Cao, Linkui
N1 - Funding Information:
This study is funded by the National Natural Science Foundation of China (Grant No. 51478262 ) and China Postdoctoral Science Foundation (No. 2018M632118 ). The authors are grateful to the Shanghai Personal Biotechnology Co., Ltd. for the technological support on high-throughput sequence and analysis.
Publisher Copyright:
© 2018
PY - 2018/12/1
Y1 - 2018/12/1
N2 - Autotrophic and mixotrophic denitrification, two approaches of biological denitrification, have drawn more and more attention among the techniques to remove nitrogen from the aquatic environment. This study investigated the influence of phosphorus on the denitrification performance and bacterial community structure in the autotrophic and mixotrophic denitrification reactors. The activity test was applied to evaluate the variation of denitrification activity of autotrophic and mixotrophic sludge before and after phosphorus addition. High-throughput sequencing was used to analyze the change of bacterial community structure. The results showed that NO3 −-N removal efficiency of autotrophic and mixotrophic denitrification process increased by 40 and 35%, respectively, after phosphorus addition. The sludge denitrification activity of autotrophic and mixotrophic sludge was enhanced significantly. And phosphorus addition could greatly improve the proportion of denitrifying bacteria in both autotrophic (from 11.83 to 64.31%) and mixotrophic denitrifying sludge (from 13.59 to 45.12%). Overall, phosphorus addition could greatly improve the autotrophic and mixotrophic denitrification ability in the phosphorus deficient surface water.
AB - Autotrophic and mixotrophic denitrification, two approaches of biological denitrification, have drawn more and more attention among the techniques to remove nitrogen from the aquatic environment. This study investigated the influence of phosphorus on the denitrification performance and bacterial community structure in the autotrophic and mixotrophic denitrification reactors. The activity test was applied to evaluate the variation of denitrification activity of autotrophic and mixotrophic sludge before and after phosphorus addition. High-throughput sequencing was used to analyze the change of bacterial community structure. The results showed that NO3 −-N removal efficiency of autotrophic and mixotrophic denitrification process increased by 40 and 35%, respectively, after phosphorus addition. The sludge denitrification activity of autotrophic and mixotrophic sludge was enhanced significantly. And phosphorus addition could greatly improve the proportion of denitrifying bacteria in both autotrophic (from 11.83 to 64.31%) and mixotrophic denitrifying sludge (from 13.59 to 45.12%). Overall, phosphorus addition could greatly improve the autotrophic and mixotrophic denitrification ability in the phosphorus deficient surface water.
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U2 - 10.1016/j.scitotenv.2018.06.185
DO - 10.1016/j.scitotenv.2018.06.185
M3 - Article
C2 - 29936156
AN - SCOPUS:85048819594
SN - 0048-9697
VL - 643
SP - 127
EP - 133
JO - Science of the Total Environment
JF - Science of the Total Environment
ER -