PMID- 30340669
OWN - NLM
STAT- MEDLINE
DCOM- 20181211
LR  - 20181211
IS  - 1001-0742 (Print)
IS  - 1001-0742 (Linking)
VI  - 74
DP  - 2018 Dec
TI  - Natural continuous influent nitrifier immigration effects on nitrification and 
      the microbial community of activated sludge systems.
PG  - 159-167
LID - S1001-0742(17)33378-8 [pii]
LID - 10.1016/j.jes.2018.02.021 [doi]
AB  - Two sequencing batch reactors (SBRs) were operated for 100days under aerobic 
      conditions, with one being fed with unsterilized municipal wastewater (USBR), and 
      the other fed with sterilized municipal wastewater (SSBR). Respirometric assays 
      and fluorescence in situ hybridization (FISH) results show that active nitrifiers 
      were present in the unsterilized influent municipal wastewater. The maximum 
      ammonia utilization rate (AUR) and nitrite utilization rate (NUR) of the 
      unsterilized influent were 0.32+/-0.12mg NH(4)(+)-N/(L.hr) and 0.71+/-0.18mg 
      NO(2)(-)-N/(L.hr). Based on the maximum utilization rates, the estimated seeding 
      intensity for the ammonia oxidizing bacteria (AOB) and nitrite oxidizing bacteria 
      (NOB) of the USBR was 0.08g AOB/(g AOB.day) and 0.20g NOB/(g NOB.day) 
      respectively. The fraction of nitrifiers/total bacteria in the influent was 
      5.35%+/-2.1%, the dominant AOB was Nitrosomonas spp., Nitrosococcus mobilis 
      hybridizated with Nsm156, and the dominant NOB was Nitrospira hybridizated with 
      Ntspa662. The influent nitrifiers potentially seeded the activated sludge of the 
      bioreactor and hence demonstrated a mitigation of the acclimatization times and 
      instability during start-up and early operation. The AUR and NUR in the USBR was 
      15% and 13% higher than the SSBR respectively during the stable stage, FISH 
      results showed that nitrifiers population especially the Nitrospira in the USBR 
      was higher than that in the SSBR. These results indicate that the natural 
      continuous immigration of nitrifiers from municipal influent streams may have 
      some repercussions on the modeling and design of bioreactors.
CI  - Copyright (c) 2017. Published by Elsevier B.V.
FAU - Yu, Lifang
AU  - Yu L
AD  - School of Environmental and Municipal Engineering, Xi'an University of 
      Architecture and Technology, Xi'an 710055, China. Electronic address: 
      yulifang@xauat.edu.cn.
FAU - Li, Ren
AU  - Li R
AD  - School of Environmental and Municipal Engineering, Xi'an University of 
      Architecture and Technology, Xi'an 710055, China.
FAU - Delatolla, Robert
AU  - Delatolla R
AD  - Department of Civil Engineering, University of Ottawa, Ottawa, ON, Canada.
FAU - Zhang, Ru
AU  - Zhang R
AD  - School of Environmental and Municipal Engineering, Xi'an University of 
      Architecture and Technology, Xi'an 710055, China.
FAU - Yang, Xiuling
AU  - Yang X
AD  - School of Environmental and Municipal Engineering, Xi'an University of 
      Architecture and Technology, Xi'an 710055, China.
FAU - Peng, Dangcong
AU  - Peng D
AD  - School of Environmental and Municipal Engineering, Xi'an University of 
      Architecture and Technology, Xi'an 710055, China.
LA  - eng
PT  - Journal Article
DEP - 20180304
PL  - Netherlands
TA  - J Environ Sci (China)
JT  - Journal of environmental sciences (China)
JID - 100967627
RN  - 0 (Sewage)
SB  - IM
MH  - Bioreactors/*microbiology
MH  - *Nitrification
MH  - Sewage/*microbiology
OTO - NOTNLM
OT  - Influent wastewater
OT  - Nitrification
OT  - Nitrifier immigration
OT  - Nitrospira
OT  - Seeding effect
EDAT- 2018/10/21 06:00
MHDA- 2018/12/12 06:00
CRDT- 2018/10/21 06:00
PHST- 2017/11/28 00:00 [received]
PHST- 2018/02/13 00:00 [revised]
PHST- 2018/02/13 00:00 [accepted]
PHST- 2018/10/21 06:00 [entrez]
PHST- 2018/10/21 06:00 [pubmed]
PHST- 2018/12/12 06:00 [medline]
AID - S1001-0742(17)33378-8 [pii]
AID - 10.1016/j.jes.2018.02.021 [doi]
PST - ppublish
SO  - J Environ Sci (China). 2018 Dec;74:159-167. doi: 10.1016/j.jes.2018.02.021. Epub 
      2018 Mar 4.