PMID- 21388173
OWN - NLM
STAT- MEDLINE
DCOM- 20110614
LR  - 20131121
IS  - 1520-5851 (Electronic)
IS  - 0013-936X (Linking)
VI  - 45
IP  - 7
DP  - 2011 Apr 1
TI  - Comparison of partial and full nitrification processes applied for treating 
      high-strength nitrogen wastewaters: microbial ecology through nitrous oxide 
      production.
PG  - 2734-40
LID - 10.1021/es103534g [doi]
AB  - The goal of this study was to compare the microbial ecology, gene expression, 
      biokinetics, and N2O emissions from a lab-scale bioreactor operated sequentially 
      in full-nitrification and partial-nitrification modes. Based on sequencing of 16S 
      rRNA and ammonia monooxygenase subunit A (amoA) genes, ammonia oxidizing bacteria 
      (AOB) populations during full- and partial-nitrification modes were distinct from 
      one another. The concentrations of AOB (XAOB) and their respiration rates during 
      full- and partial-nitrification modes were statistically similar, whereas the 
      concentrations of nitrite oxidizing bacteria (XNOB) and their respiration rates 
      declined significantly after the switch from full- to partial-nitrification. The 
      transition from full-nitrification to partial nitrification resulted in a 
      protracted transient spike of nitrous oxide (N2O) and nitric oxide (NO) 
      emissions, which later stabilized. The trends in N2O and NO emissions correlated 
      well with trends in the expression of nirK and norB genes that code for the 
      production of these gases in AOB. Both the transient and stabilized N2O and NO 
      emissions during partial nitrification were statistically higher than those 
      during steady-state full-nitrification. Based on these results, partial 
      nitrification strategies for biological nitrogen removal, although attractive for 
      their reduced operating costs and energy demand, may need to be optimized against 
      the higher carbon foot-print attributed to their N2O emissions.
FAU - Ahn, Joon Ho
AU  - Ahn JH
AD  - Department of Earth and Environmental Engineering, Columbia University, 500 West 
      120th Street, New York, New York 10027, United States.
FAU - Kwan, Tiffany
AU  - Kwan T
FAU - Chandran, Kartik
AU  - Chandran K
LA  - eng
SI  - GENBANK/HQ228576
SI  - GENBANK/HQ228577
SI  - GENBANK/HQ228578
SI  - GENBANK/HQ228579
SI  - GENBANK/HQ228580
SI  - GENBANK/HQ228581
SI  - GENBANK/HQ228582
SI  - GENBANK/HQ228583
SI  - GENBANK/HQ228584
SI  - GENBANK/HQ228585
SI  - GENBANK/HQ228586
SI  - GENBANK/HQ228587
SI  - GENBANK/HQ228588
SI  - GENBANK/HQ228589
SI  - GENBANK/HQ228590
SI  - GENBANK/HQ228591
SI  - GENBANK/HQ228592
SI  - GENBANK/HQ228593
SI  - GENBANK/HQ228594
SI  - GENBANK/HQ228595
SI  - GENBANK/HQ228596
SI  - GENBANK/HQ228597
SI  - GENBANK/HQ228598
SI  - GENBANK/HQ228599
SI  - GENBANK/HQ228600
SI  - GENBANK/HQ228601
SI  - GENBANK/HQ228602
SI  - GENBANK/HQ228603
SI  - GENBANK/HQ228604
SI  - GENBANK/HQ228605
SI  - GENBANK/HQ228606
SI  - GENBANK/HQ228607
SI  - GENBANK/HQ228608
SI  - GENBANK/HQ228609
SI  - GENBANK/HQ228610
SI  - GENBANK/HQ228611
SI  - GENBANK/HQ228612
SI  - GENBANK/HQ228613
SI  - GENBANK/HQ228614
SI  - GENBANK/HQ228615
SI  - GENBANK/HQ228616
SI  - GENBANK/HQ228617
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PT  - Research Support, U.S. Gov't, Non-P.H.S.
DEP - 20110309
PL  - United States
TA  - Environ Sci Technol
JT  - Environmental science & technology
JID - 0213155
RN  - 0 (Bacterial Proteins)
RN  - 0 (Water Pollutants, Chemical)
RN  - 7664-41-7 (Ammonia)
RN  - K50XQU1029 (Nitrous Oxide)
SB  - IM
MH  - Ammonia/metabolism
MH  - Bacteria/classification/genetics/*metabolism
MH  - Bacterial Proteins/genetics/metabolism
MH  - Base Sequence
MH  - Bioreactors/microbiology
MH  - Ecology
MH  - Molecular Sequence Data
MH  - *Nitrification
MH  - Nitrous Oxide/*metabolism
MH  - Water Microbiology
MH  - Water Pollutants, Chemical/*metabolism
EDAT- 2011/03/11 06:00
MHDA- 2011/06/15 06:00
CRDT- 2011/03/11 06:00
PHST- 2011/03/11 06:00 [entrez]
PHST- 2011/03/11 06:00 [pubmed]
PHST- 2011/06/15 06:00 [medline]
AID - 10.1021/es103534g [doi]
PST - ppublish
SO  - Environ Sci Technol. 2011 Apr 1;45(7):2734-40. doi: 10.1021/es103534g. Epub 2011 
      Mar 9.