PMID- 34574494
OWN - NLM
STAT- MEDLINE
DCOM- 20211101
LR  - 20240403
IS  - 1660-4601 (Electronic)
IS  - 1661-7827 (Print)
IS  - 1660-4601 (Linking)
VI  - 18
IP  - 18
DP  - 2021 Sep 10
TI  - Enhanced Denitrification of Integrated Sewage Treatment System by Supplementing 
      Denitrifying Carbon Source.
LID - 10.3390/ijerph18189569 [doi]
LID - 9569
AB  - Integrated sewage treatment system (ISTY) is a new technology for rural domestic 
      sewage treatment. In the ISTY, the carbon source in the denitrification stage is 
      often insufficient, affecting the denitrification efficiency. In order to improve 
      the denitrification efficiency, several commonly available agricultural wastes, 
      peanut shell (PS), sawdust (SD), peat (PT), and their mixtures (MT), were 
      selected as supplementary carbon sources in the denitrification stage of ISTY to 
      study the denitrification efficiency. Results show that PS exhibited a high 
      carbon release capacity. PS released an enormous amount of carbon in 144 h, and 
      the cumulative total organic carbon was 41.99 +/- 0.7 mg/(g.L). The optimum carbon 
      source dosage was 3 g/L, the nitrate removal rates of PS exceeded 95% after 48 h, 
      and the denitrification rates were 9.35 mg/(g.L), which were 63.92% higher than 
      that of the control group. After running the ISTY for 120 h, and with PS as 
      supplementary carbon sources, the removal rate of TN increased from 29.76% to 
      83.86%. At the genus level, the dominant denitrifying bacteria in ISTY, after 
      adding PS, were Pseudomonas and Cupriavidus, accounting for 78.68%, an increase 
      of 72.90% compared with the control group. This evidence suggested that PS can 
      obviously enhance the denitrification efficiency of the ISTY as a supplementary 
      carbon source.
FAU - Chen, Dongkai
AU  - Chen D
AD  - Agro-Environmental Protection Institute, Ministry of Agriculture and Rural 
      Affairs, Tianjin 300191, China.
FAU - Chen, Peizhen
AU  - Chen P
AD  - Agro-Environmental Protection Institute, Ministry of Agriculture and Rural 
      Affairs, Tianjin 300191, China.
FAU - Zheng, Xiangqun
AU  - Zheng X
AD  - Agro-Environmental Protection Institute, Ministry of Agriculture and Rural 
      Affairs, Tianjin 300191, China.
FAU - Cheng, Weimin
AU  - Cheng W
AD  - Agro-Environmental Protection Institute, Ministry of Agriculture and Rural 
      Affairs, Tianjin 300191, China.
FAU - Wang, Qiang
AU  - Wang Q
AD  - Agro-Environmental Protection Institute, Ministry of Agriculture and Rural 
      Affairs, Tianjin 300191, China.
FAU - Wei, Xiaocheng
AU  - Wei X
AD  - Agro-Environmental Protection Institute, Ministry of Agriculture and Rural 
      Affairs, Tianjin 300191, China.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20210910
PL  - Switzerland
TA  - Int J Environ Res Public Health
JT  - International journal of environmental research and public health
JID - 101238455
RN  - 0 (Nitrates)
RN  - 0 (Sewage)
RN  - 7440-44-0 (Carbon)
RN  - N762921K75 (Nitrogen)
SB  - IM
MH  - Bioreactors
MH  - *Carbon
MH  - *Denitrification
MH  - Nitrates
MH  - Nitrogen
MH  - Sewage
PMC - PMC8470696
OTO - NOTNLM
OT  - carbon release mechanism
OT  - denitrification
OT  - integrated sewage treatment system (ISTY)
OT  - nitrogen removal
OT  - supplementary carbon source
COIS- These authors declare no conflict of interest.
EDAT- 2021/09/29 06:00
MHDA- 2021/11/03 06:00
PMCR- 2021/09/10
CRDT- 2021/09/28 01:12
PHST- 2021/08/11 00:00 [received]
PHST- 2021/09/07 00:00 [revised]
PHST- 2021/09/07 00:00 [accepted]
PHST- 2021/09/28 01:12 [entrez]
PHST- 2021/09/29 06:00 [pubmed]
PHST- 2021/11/03 06:00 [medline]
PHST- 2021/09/10 00:00 [pmc-release]
AID - ijerph18189569 [pii]
AID - ijerph-18-09569 [pii]
AID - 10.3390/ijerph18189569 [doi]
PST - epublish
SO  - Int J Environ Res Public Health. 2021 Sep 10;18(18):9569. doi: 
      10.3390/ijerph18189569.