PMID- 29965219
OWN - NLM
STAT- MEDLINE
DCOM- 20181211
LR  - 20181211
IS  - 0250-3301 (Print)
IS  - 0250-3301 (Linking)
VI  - 38
IP  - 10
DP  - 2017 Oct 8
TI  - [Effect of Two-Stage Aeration on Nitrogen Removal Performance of Aerobic Granular 
      Sludge].
PG  - 4332-4339
LID - 10.13227/j.hjkx.201703207 [doi]
AB  - Four mini experiments were conducted at different conditions. The heterotrophic 
      microorganisms on the aerobic granular sludge surface consumed organic compounds 
      at the initial stage of aeration. The denitrification rate and the efficiency of 
      NO(2)(-)-N and NO(3)(-)-N removal were relatively low. Therefore, under the 
      normal temperature conditions (20-23℃), aerobic granular sludge sequencing batch 
      reactor (SBR) was operated in the two-stage aeration mode(first in low aeration 
      then in high aeration mode). The low aeration time were carried out at 1, 2 and 3 
      hours stages respectively, and the characteristics of the granular sludge and its 
      effects on microorganisms were analyzed by scanning electron microscopy (SEM) and 
      fluorescence in situ hybridization (FISH) technique. The results show that the 
      increase in the aerobic granular sludge (AGS) particle size improved the 
      denitrification capacity; the denitrification rate of NO(2)(-)-N was the highest 
      at low aeration mode with 2 h and reached 9.66 mg.(g.h)(-1). The accumulation 
      rate of nitrite increased to 77.84% and the total nitrogen removal rate to 70%. 
      The bacterial count inside the granular sludge increased and they were mainly 
      cocci, bacillus, and ellipsoidal bacteria. Moreover, the proportion of 
      ammonia-oxidizing bacteria in total bacterial count increased from 13.70% to 
      15.40%. Therefore, the two-stage aeration process achieved shortened simultaneous 
      nitrification and denitrification processes and showed a good denitrification 
      performance.
FAU - Wang, Wen-Xiao
AU  - Wang WX
AD  - College of Architecture and Civil Engineering of Beijing University of 
      Technology, Beijing 100124, China.
FAU - Bian, Wei
AU  - Bian W
AD  - College of Architecture and Civil Engineering of Beijing University of 
      Technology, Beijing 100124, China.
FAU - Wang, Meng
AU  - Wang M
AD  - Beijing Drainage Group Co., Ltd., Beijing 100044, China.
FAU - Kan, Rui-Zhe
AU  - Kan RZ
AD  - College of Architecture and Civil Engineering of Beijing University of 
      Technology, Beijing 100124, China.
FAU - Zhao, Qing
AU  - Zhao Q
AD  - College of Architecture and Civil Engineering of Beijing University of 
      Technology, Beijing 100124, China.
FAU - Liang, Dong-Bo
AU  - Liang DB
AD  - College of Architecture and Civil Engineering of Beijing University of 
      Technology, Beijing 100124, China.
FAU - Li, Jun
AU  - Li J
AD  - College of Architecture and Civil Engineering of Beijing University of 
      Technology, Beijing 100124, China.
LA  - chi
PT  - Journal Article
PL  - China
TA  - Huan Jing Ke Xue
JT  - Huan jing ke xue= Huanjing kexue
JID - 8405344
RN  - 0 (Sewage)
RN  - N762921K75 (Nitrogen)
SB  - IM
MH  - Bacteria/classification
MH  - *Bioreactors
MH  - *Denitrification
MH  - In Situ Hybridization, Fluorescence
MH  - Nitrogen/*isolation & purification
MH  - Sewage/*microbiology
MH  - *Waste Disposal, Fluid
OTO - NOTNLM
OT  - aerobic granular sludge
OT  - denitrification rate
OT  - nitrite accumulation rate
OT  - shortcut simultaneous nitrification and denitrification
OT  - two-stage aeration
EDAT- 2018/07/03 06:00
MHDA- 2018/12/12 06:00
CRDT- 2018/07/03 06:00
PHST- 2018/07/03 06:00 [entrez]
PHST- 2018/07/03 06:00 [pubmed]
PHST- 2018/12/12 06:00 [medline]
AID - 10.13227/j.hjkx.201703207 [doi]
PST - ppublish
SO  - Huan Jing Ke Xue. 2017 Oct 8;38(10):4332-4339. doi: 10.13227/j.hjkx.201703207.