PMID- 32050387
OWN - NLM
STAT- MEDLINE
DCOM- 20200422
LR  - 20200422
IS  - 1879-1026 (Electronic)
IS  - 0048-9697 (Linking)
VI  - 712
DP  - 2020 Apr 10
TI  - The effect of supporting matrix on sludge granulation under low hydraulic shear 
      force: Performance, microbial community dynamics and microorganisms migration.
PG  - 136562
LID - S0048-9697(20)30072-3 [pii]
LID - 10.1016/j.scitotenv.2020.136562 [doi]
AB  - Granular sludge usually takes extracellular polymers (EPS) as matrices for 
      colonizing microorganisms and maintaining structural stability. However, the low 
      strength of EPS threatens the disintegration of granules, especially under low 
      hydraulic shear force. To accelerate the formation and enhance the stability of 
      granules, micro-sized melamine (ME) sponges (RA) and polyurethane (PU) sponges 
      (RB) were screened out as matrix substitutes for developing aerobic granular 
      biofilm (AGB) in this study. The superficial gas velocity was 0.8 cm s(-)(1). 
      Both reactors achieved over 95% ammonium nitrogen removal efficiency within 
      10 days. During stabilization period, the chemical oxygen demand, total nitrogen 
      and total phosphorus removal efficiencies were 90.5%, 70% and 95% in RA and 
      87.8%, 83% and 88% in RB, respectively. Confocal laser scanning microscopy (CLSM) 
      detection revealed that beta-polysaccharide was more concentrated in the outer layer 
      in PU-AGB but uniformly dispersed in ME-AGB. The denitrifying phosphorus 
      accumulating organisms (Flavobacterium) was dominant in RA, while the 
      denitrifying glycogen accumulating organisms (Candidatus_Competibacter) was 
      dominant in RB. Fluorescence in situ hybridization (FISH) analysis indicated that 
      the microbial distribution in ME-AGB was relatively uniform, while there was a 
      significant migration of functional microorganisms in PU-AGB. The 
      super-hydrophilicity of ME and the high hydrophobicity of PU may be the main 
      reasons for these differences. Overall, this study indicated that ME sponge is a 
      more suitable material for supporting AGB than PU sponge.
CI  - Copyright (c) 2020 Elsevier B.V. All rights reserved.
FAU - Xu, Jie
AU  - Xu J
AD  - School of Environment, Harbin Institute of Technology (HIT), Harbin 150090, 
      China.
FAU - Pang, Heliang
AU  - Pang H
AD  - School of Environment, Harbin Institute of Technology (HIT), Harbin 150090, 
      China. Electronic address: panghelianghit@163.com.
FAU - He, Junguo
AU  - He J
AD  - Guangzhou University, Guangzhou 510006, China.
FAU - Nan, Jun
AU  - Nan J
AD  - School of Environment, Harbin Institute of Technology (HIT), Harbin 150090, 
      China.
LA  - eng
PT  - Journal Article
DEP - 20200107
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
RN  - 0 (Sewage)
RN  - 27YLU75U4W (Phosphorus)
RN  - N762921K75 (Nitrogen)
SB  - IM
MH  - Aerobiosis
MH  - Bioreactors
MH  - In Situ Hybridization, Fluorescence
MH  - *Microbiota
MH  - Nitrogen
MH  - Phosphorus
MH  - *Sewage
MH  - Waste Disposal, Fluid
OTO - NOTNLM
OT  - Aerobic granular biofilm
OT  - Extracellular polymers matrix
OT  - Fluorescence in situ hybridization
OT  - Microbial community dynamics
OT  - Simultaneous pollutants removal
COIS- Declaration of competing interest The authors declare that they have no known 
      competing financial interests or personal relationships that could have appeared 
      to influence the work reported in this paper.
EDAT- 2020/02/14 06:00
MHDA- 2020/04/23 06:00
CRDT- 2020/02/14 06:00
PHST- 2019/10/31 00:00 [received]
PHST- 2019/12/12 00:00 [revised]
PHST- 2020/01/04 00:00 [accepted]
PHST- 2020/02/14 06:00 [entrez]
PHST- 2020/02/14 06:00 [pubmed]
PHST- 2020/04/23 06:00 [medline]
AID - S0048-9697(20)30072-3 [pii]
AID - 10.1016/j.scitotenv.2020.136562 [doi]
PST - ppublish
SO  - Sci Total Environ. 2020 Apr 10;712:136562. doi: 10.1016/j.scitotenv.2020.136562. 
      Epub 2020 Jan 7.