PMID- 22894089
OWN - NLM
STAT- MEDLINE
DCOM- 20120906
LR  - 20190911
IS  - 1001-0742 (Print)
IS  - 1001-0742 (Linking)
VI  - 24
IP  - 4
DP  - 2012
TI  - Comparison of conventional and inverted A2/O processes: phosphorus release and 
      uptake behaviors.
PG  - 571-8
AB  - Two full-scale systems operated in parallel, a conventional A2/O system 
      consisting of anaerobic, anoxic and oxic compartments in succession and an 
      inverted system consisting of anoxic, anaerobic and oxic compartments without 
      internal recycle, were compared in terms of their phosphorus removal performance, 
      with an emphasis on phosphate (P) release behaviors, using both operational data 
      and simulation results. The inverted system exhibited better long-term phosphorus 
      removal performance (0.2 +/- 0.3 vs. 0.7 +/- 0.7 mg/L), which should be 
      attributed to the higher P release rate (0.79 vs. 0.60 kg P/(kg MLSS x day)) in 
      the non-aerated compartments. The P release occurred in both the anoxic and 
      anaerobic compartments of the inverted system, resulting in more efficient P 
      release. Although the abundances of the 'Candidatus Accumulibacter phosphatis' 
      population in the two systems were quite similar ((19.1 +/- 3.27)% and (18.4 +/- 
      4.15)% of the total microbe (DAPI stained particles) population in the inverted 
      and conventional systems, respectively, by fluorescence in situ hybridization 
      (FISH)), the high-concentration DAPI staining results show that the abundances of 
      the whole polyphosphate accumulating organisms (PAOs) in the aerobic ends were 
      quite different (the average ratios of the poly-P granules to total microbes 
      (DAPI stained particles) were (45 +/- 4.18)% and (35 +/- 5.39)%, respectively). 
      Both the operational data and simulation results showed that the inverted system 
      retained more abundant PAO populations due to its special configuration, which 
      permitted efficient P release in the non-aerated compartment and better P 
      removal.
FAU - Qi, Rong
AU  - Qi R
AD  - State Key Laboratory of Environmental Aquatic Chemistry, Research Center for 
      Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. 
      qirong@rcees.ac.cn
FAU - Yu, Tao
AU  - Yu T
FAU - Li, Zheng
AU  - Li Z
FAU - Li, Dong
AU  - Li D
FAU - Mino, Takashi
AU  - Mino T
FAU - Shoji, Tadashi
AU  - Shoji T
FAU - Fujie, Kochi
AU  - Fujie K
FAU - Yang, Min
AU  - Yang M
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - Netherlands
TA  - J Environ Sci (China)
JT  - Journal of environmental sciences (China)
JID - 100967627
RN  - 0 (Nitrates)
RN  - 0 (Nitrites)
RN  - 0 (Phosphates)
RN  - 0 (Polyphosphates)
RN  - 27YLU75U4W (Phosphorus)
SB  - IM
MH  - Aerobiosis
MH  - Anaerobiosis
MH  - Biodegradation, Environmental
MH  - Biological Oxygen Demand Analysis
MH  - Bioreactors/microbiology
MH  - Environmental Restoration and Remediation/*methods
MH  - Extracellular Space/metabolism
MH  - Models, Biological
MH  - Nitrates/analysis
MH  - Nitrites/analysis
MH  - Phosphates/analysis
MH  - Phosphorus/*metabolism
MH  - Polyphosphates/metabolism
MH  - Time Factors
MH  - Waste Disposal, Fluid
EDAT- 2012/08/17 06:00
MHDA- 2012/09/07 06:00
CRDT- 2012/08/17 06:00
PHST- 2012/08/17 06:00 [entrez]
PHST- 2012/08/17 06:00 [pubmed]
PHST- 2012/09/07 06:00 [medline]
AID - 10.1016/s1001-0742(11)60808-5 [doi]
PST - ppublish
SO  - J Environ Sci (China). 2012;24(4):571-8. doi: 10.1016/s1001-0742(11)60808-5.