PMID- 24721663
OWN - NLM
STAT- MEDLINE
DCOM- 20150115
LR  - 20221207
IS  - 1879-2448 (Electronic)
IS  - 0043-1354 (Linking)
VI  - 57
DP  - 2014 Jun 15
TI  - Control of aeration, aerobic SRT and COD input for mainstream 
      nitritation/denitritation.
PG  - 162-71
LID - S0043-1354(14)00225-5 [pii]
LID - 10.1016/j.watres.2014.03.035 [doi]
AB  - This work describes the development of an intermittently aerated pilot-scale 
      process (V = 0.34 m(3)) operated without oxidized nitrogen recycle and 
      supplemental carbon addition optimized for nitrogen removal via 
      nitritation/denitritation. The aeration pattern was controlled using a novel 
      aeration strategy based on set-points for reactor ammonia, nitrite and nitrate 
      concentrations with the aim of maintaining equal effluent ammonia and 
      nitrate + nitrite (NOx) concentrations. Further, unique operational and process 
      control strategies were developed to facilitate the out-selection of nitrite 
      oxidizing bacteria (NOB) based on optimizing the chemical oxygen demand (COD) 
      input, imposing transient anoxia, aggressive solids retention time (SRT) 
      operation towards ammonia oxidizing bacteria (AOB) washout and high dissolved 
      oxygen (DO) (>1.5 mg/L). Sustained nitrite accumulation 
      (NO2-N/NOx-N = 0.36 +/- 0.27) was observed while AOB activity was greater than NOB 
      activity (AOB: 391 +/- 124 mgN/L/d, NOB: 233 +/- 151 mgN/L/d, p < 0.001) during the 
      entire study. The reactor demonstrated total inorganic nitrogen (TIN) removal 
      rate of 151 +/- 74 mgN/L/d at an influent COD/ [Formula: see text] -N ratio of 
      10.4 +/- 1.9 at 25  degrees C. The TIN removal efficiency was 57  +/-  25% within the 
      hydraulic retention time (HRT) of 3 h and within an SRT of 4-8 days. Therefore, 
      this pilot-scale study demonstrates that application of the proposed online 
      aeration control is able to out-select NOB in mainstream conditions providing 
      relatively high nitrogen removal without supplemental carbon and alkalinity at a 
      low HRT.
CI  - Copyright (c) 2014 Elsevier Ltd. All rights reserved.
FAU - Regmi, Pusker
AU  - Regmi P
AD  - Civil and Environment Engineering Department, Old Dominion University, Norfolk, 
      VA 23529, USA. Electronic address: pregm001@odu.edu.
FAU - Miller, Mark W
AU  - Miller MW
AD  - Civil and Environment Engineering Department, Virginia Tech, Blacksburg, VA 
      24060, USA.
FAU - Holgate, Becky
AU  - Holgate B
AD  - Civil and Environment Engineering Department, Old Dominion University, Norfolk, 
      VA 23529, USA.
FAU - Bunce, Ryder
AU  - Bunce R
AD  - Hazen and Sawyer, P.C, USA.
FAU - Park, Hongkeun
AU  - Park H
AD  - Department of Earth and Environmental Engineering, Columbia University, 500 West 
      120th Street, New York, NY 10027, USA.
FAU - Chandran, Kartik
AU  - Chandran K
AD  - Department of Earth and Environmental Engineering, Columbia University, 500 West 
      120th Street, New York, NY 10027, USA.
FAU - Wett, Bernhard
AU  - Wett B
AD  - ARA Consult, Unterbergerstr.1, 6020 Innsbruck, Austria.
FAU - Murthy, Sudhir
AU  - Murthy S
AD  - DC Water Authority, 5000 Overlook Ave. SW, Washington DC 20032, USA.
FAU - Bott, Charles B
AU  - Bott CB
AD  - Hampton Roads Sanitation District, 1436 Air Rail Ave., Virginia Beach, VA 23455, 
      USA.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20140326
PL  - England
TA  - Water Res
JT  - Water research
JID - 0105072
RN  - 0 (Nitrates)
RN  - 0 (Nitrites)
RN  - 0 (Waste Water)
RN  - 7440-44-0 (Carbon)
RN  - 7664-41-7 (Ammonia)
RN  - S88TT14065 (Oxygen)
SB  - IM
MH  - Ammonia/*metabolism
MH  - Bacteria/metabolism
MH  - Biological Oxygen Demand Analysis
MH  - Bioreactors/microbiology
MH  - Carbon/metabolism
MH  - Nitrates/*metabolism
MH  - Nitrites/*metabolism
MH  - Oxidation-Reduction
MH  - Oxygen/metabolism
MH  - Pilot Projects
MH  - Time Factors
MH  - Waste Disposal, Fluid/*methods
MH  - Wastewater/analysis
OTO - NOTNLM
OT  - AOB
OT  - Denitritation
OT  - NOB
OT  - Nitritation
OT  - Online aeration control
OT  - Transient anoxia
EDAT- 2014/04/12 06:00
MHDA- 2015/01/16 06:00
CRDT- 2014/04/12 06:00
PHST- 2013/12/27 00:00 [received]
PHST- 2014/02/10 00:00 [revised]
PHST- 2014/03/14 00:00 [accepted]
PHST- 2014/04/12 06:00 [entrez]
PHST- 2014/04/12 06:00 [pubmed]
PHST- 2015/01/16 06:00 [medline]
AID - S0043-1354(14)00225-5 [pii]
AID - 10.1016/j.watres.2014.03.035 [doi]
PST - ppublish
SO  - Water Res. 2014 Jun 15;57:162-71. doi: 10.1016/j.watres.2014.03.035. Epub 2014 
      Mar 26.