PMID- 28697582
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20240327
IS  - 2191-0855 (Print)
IS  - 2191-0855 (Electronic)
IS  - 2191-0855 (Linking)
VI  - 7
IP  - 1
DP  - 2017 Dec
TI  - The role of inorganic nitrogen in successful formation of granular biofilms for 
      wastewater treatment that support cyanobacteria and bacteria.
PG  - 146
LID - 10.1186/s13568-017-0444-8 [doi]
LID - 146
AB  - Recently, the use of phototrophs for wastewater treatment has been revisited 
      because of new approaches to separate them from effluent streams. One 
      manifestation uses oxygenic photogranules (OPGs) which are dense, 
      easily-settleable granular biofilms of cyanobacteria, which surrounding 
      populations of heterotrophs, autotrophs, and microalgae. OPGs can remove COD and 
      nitrogenous compounds without external aeration. To better grow and maintain 
      biomass in the proposed wastewater process, this study seeks to understand the 
      factors that contribute to successful granulation. Availability of initial 
      inorganic nitrogen, particularly ammonium, was associated with successful 
      cultivation of OPGs. In the first days of granulation, a decrease in ammonium 
      coupled with an increase in a cyanobacterial-specific 16S rRNA gene, may suggest 
      that ammonium was assimilated in cyanobacteria offering a competitive environment 
      for growth. Though both successful and unsuccessful OPG formation demonstrated a 
      shift from non-phototrophic bacterial dominated communities on day 0 to 
      cyanobacterial dominated communities on day 42, the successful community had a 
      greater relative abundance (46%) of OTUs associated with genera Oscillatoria and 
      Geitlernema than the unsuccessful community (27%), supporting that filamentous 
      cyanobacteria are essential for successful OPG formation. A greater concentration 
      of chlorophyll b in the unsuccessful OPG formation suggested a greater abundance 
      of algal species. This study offers indicators of granulation success, notably 
      availability of inorganic nitrogen and chlorophyll a and b concentrations for 
      monitoring the health and growth of biomass for a potential OPG process.
FAU - Stauch-White, Kristie
AU  - Stauch-White K
AD  - Department of Civil and Environmental Engineering, University of Massachusetts, 
      Amherst, 01003, USA.
FAU - Srinivasan, Varun N
AU  - Srinivasan VN
AD  - Department of Civil and Environmental Engineering, University of Massachusetts, 
      Amherst, 01003, USA.
FAU - Camilla Kuo-Dahab, W
AU  - Camilla Kuo-Dahab W
AD  - Department of Civil and Environmental Engineering, University of Massachusetts, 
      Amherst, 01003, USA.
FAU - Park, Chul
AU  - Park C
AD  - Department of Civil and Environmental Engineering, University of Massachusetts, 
      Amherst, 01003, USA.
FAU - Butler, Caitlyn S
AU  - Butler CS
AD  - Department of Civil and Environmental Engineering, University of Massachusetts, 
      Amherst, 01003, USA. cbutler@ecs.umass.edu.
LA  - eng
PT  - Journal Article
DEP - 20170710
PL  - Germany
TA  - AMB Express
JT  - AMB Express
JID - 101561785
PMC - PMC5503847
OTO - NOTNLM
OT  - Filamentous cyanobacteria
OT  - Granular biomass
OT  - Inorganic nitrogen
OT  - Oxygenic photogranules
OT  - Wastewater treatment
EDAT- 2017/07/13 06:00
MHDA- 2017/07/13 06:01
PMCR- 2017/07/10
CRDT- 2017/07/13 06:00
PHST- 2017/06/21 00:00 [received]
PHST- 2017/06/22 00:00 [accepted]
PHST- 2017/07/13 06:00 [entrez]
PHST- 2017/07/13 06:00 [pubmed]
PHST- 2017/07/13 06:01 [medline]
PHST- 2017/07/10 00:00 [pmc-release]
AID - 10.1186/s13568-017-0444-8 [pii]
AID - 444 [pii]
AID - 10.1186/s13568-017-0444-8 [doi]
PST - ppublish
SO  - AMB Express. 2017 Dec;7(1):146. doi: 10.1186/s13568-017-0444-8. Epub 2017 Jul 10.