PMID- 31790233
OWN - NLM
STAT- MEDLINE
DCOM- 20200617
LR  - 20221207
IS  - 1520-5851 (Electronic)
IS  - 0013-936X (Linking)
VI  - 54
IP  - 1
DP  - 2020 Jan 7
TI  - Growth Progression of Oxygenic Photogranules and Its Impact on Bioactivity for 
      Aeration-Free Wastewater Treatment.
PG  - 486-496
LID - 10.1021/acs.est.9b04745 [doi]
AB  - Oxygenic photogranules (OPGs), spherical aggregates comprised of phototrophic and 
      nonphototrophic microorganisms, treat wastewater without aeration, which 
      currently incurs the highest energy demand in wastewater treatment. In 
      wastewater-treatment reactors, photogranules grow in number as well as in size. 
      Currently, it is unknown how the photogranules grow in size and how the growth 
      impacts their properties and performance in wastewater treatment. Here, we 
      present that the photogranules' growth occurs with changes in phototrophic 
      community and granular morphology. We observed that as the photogranules grow 
      larger, filamentous cyanobacteria become enriched while other phototrophic 
      microbes diminish significantly. The photogranules greater than 3 mm in diameter 
      showed the development of a layered structure in which a concentric filamentous 
      cyanobacterial layer encloses noncyanobacterial aggregates. We observed that the 
      growth of photogranules significantly impacts their capability of producing 
      oxygen, the key element in OPG wastewater treatment. Among seven size classes 
      investigated in this study, photogranules in the 0.5-1 mm size group showed the 
      highest specific oxygen production rate (SOPR), 21.9 +/- 1.3 mg O(2)/g VSS-h, 
      approximately 75% greater than the SOPR of mixed photogranular biomass. We 
      discuss engineering the OPG process based on photogranules' size, promoting the 
      stability of the granular process and enhancing efficiency for self-aerating 
      wastewater treatment.
FAU - Abouhend, Ahmed S
AU  - Abouhend AS
AD  - Department of Civil and Environmental Engineering, University of Massachusetts 
      Amherst, Amherst, Massachusetts 01003, United States.
FAU - Milferstedt, Kim
AU  - Milferstedt K
AD  - LBE, Univ Montpellier, INRAE, Narbonne F-11100, France.
FAU - Hamelin, Jerome
AU  - Hamelin J
AD  - LBE, Univ Montpellier, INRAE, Narbonne F-11100, France.
FAU - Ansari, Abeera A
AU  - Ansari AA
AD  - Department of Civil and Environmental Engineering, University of Massachusetts 
      Amherst, Amherst, Massachusetts 01003, United States.
FAU - Butler, Caitlyn
AU  - Butler C
AD  - Department of Civil and Environmental Engineering, University of Massachusetts 
      Amherst, Amherst, Massachusetts 01003, United States.
FAU - Carbajal-Gonzalez, Blanca I
AU  - Carbajal-Gonzalez BI
AD  - Science Center Microscopy Facility, Mount Holyoke College, South Hadley, 
      Massachusetts 01075, United States.
FAU - Park, Chul
AU  - Park C
AUID- ORCID: 0000-0003-0695-8562
AD  - Department of Civil and Environmental Engineering, University of Massachusetts 
      Amherst, Amherst, Massachusetts 01003, United States.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PT  - Research Support, U.S. Gov't, Non-P.H.S.
DEP - 20191212
PL  - United States
TA  - Environ Sci Technol
JT  - Environmental science & technology
JID - 0213155
RN  - 0 (Sewage)
RN  - 0 (Waste Water)
RN  - S88TT14065 (Oxygen)
SB  - IM
MH  - Biomass
MH  - Bioreactors
MH  - *Cyanobacteria
MH  - Oxygen
MH  - Sewage
MH  - Waste Disposal, Fluid
MH  - *Wastewater
EDAT- 2019/12/04 06:00
MHDA- 2020/06/18 06:00
CRDT- 2019/12/03 06:00
PHST- 2019/12/04 06:00 [pubmed]
PHST- 2020/06/18 06:00 [medline]
PHST- 2019/12/03 06:00 [entrez]
AID - 10.1021/acs.est.9b04745 [doi]
PST - ppublish
SO  - Environ Sci Technol. 2020 Jan 7;54(1):486-496. doi: 10.1021/acs.est.9b04745. Epub 
      2019 Dec 12.