PMID- 32172053
OWN - NLM
STAT- MEDLINE
DCOM- 20200415
LR  - 20200415
IS  - 1879-2448 (Electronic)
IS  - 0043-1354 (Linking)
VI  - 175
DP  - 2020 May 15
TI  - Enhancing anaerobic digestion in anaerobic integrated floating fixed-film 
      activated sludge (An-IFFAS) system using novel electron mediator suspended 
      biofilm carriers.
PG  - 115697
LID - S0043-1354(20)30233-5 [pii]
LID - 10.1016/j.watres.2020.115697 [doi]
AB  - Suspended biofilm carriers mediating direct interspecies electron transfer 
      (DIET)-based syntrophic metabolism is a promising strategy to enhance anaerobic 
      digestion and methane production by associating the advantages of conductive 
      suspended biofilm carriers and anaerobic integrated floating fixed-film and 
      activated sludge (An-IFFAS) process. However, the current knowledge of DIET using 
      conductive suspended biofilm carrier is still limited. In this study, novel 
      electron mediator suspended biofilm carriers had been prepared by introducing a 
      series of graphite powders (3 wt%, 5 wt% and 7 wt%) into high-density 
      polyethylene (HDPE), and applied in An-IFFAS reactors. Results showed that 
      An-IFFAS reactors filled with graphite-modified carriers could enhance the 
      degradation of organic matters and the production of methane significantly in 
      comparison with the control reactor filled with conventional HDPE carriers at 
      organic loading rates (OLRs) of 5.9-23.7 kg COD/m(3)/d. Microbial analysis proved 
      that 7 wt% graphite-modified carrier improved approximately 4.2% abundance of 
      Geobacter and 7.3% abundance of electrotrophic methanogens (Methanothrix) that 
      exchange electron via DIET comparing with that of HDPE carriers, respectively. 
      These findings demonstrated that electron mediator suspended biofilm carrier was 
      able to potentially proceed DIET and enhance the efficiency of anaerobic 
      digestion and recover CH(4)-related energy.
CI  - Copyright (c) 2020 Elsevier Ltd. All rights reserved.
FAU - Liu, Jifu
AU  - Liu J
AD  - Key Laboratory of Industrial Ecology and Environmental Engineering (Dalian 
      University of Technology), Ministry of Education, School of Environmental Science 
      and Technology, Dalian University of Technology, Dalian, 116024, China.
FAU - Liu, Tao
AU  - Liu T
AD  - Key Laboratory of Industrial Ecology and Environmental Engineering (Dalian 
      University of Technology), Ministry of Education, School of Environmental Science 
      and Technology, Dalian University of Technology, Dalian, 116024, China.
FAU - Chen, Shuo
AU  - Chen S
AD  - Key Laboratory of Industrial Ecology and Environmental Engineering (Dalian 
      University of Technology), Ministry of Education, School of Environmental Science 
      and Technology, Dalian University of Technology, Dalian, 116024, China.
FAU - Yu, Hongtao
AU  - Yu H
AD  - Key Laboratory of Industrial Ecology and Environmental Engineering (Dalian 
      University of Technology), Ministry of Education, School of Environmental Science 
      and Technology, Dalian University of Technology, Dalian, 116024, China.
FAU - Zhang, Yaobin
AU  - Zhang Y
AD  - Key Laboratory of Industrial Ecology and Environmental Engineering (Dalian 
      University of Technology), Ministry of Education, School of Environmental Science 
      and Technology, Dalian University of Technology, Dalian, 116024, China.
FAU - Quan, Xie
AU  - Quan X
AD  - Key Laboratory of Industrial Ecology and Environmental Engineering (Dalian 
      University of Technology), Ministry of Education, School of Environmental Science 
      and Technology, Dalian University of Technology, Dalian, 116024, China. 
      Electronic address: quanxie@dlut.edu.cn.
LA  - eng
PT  - Journal Article
DEP - 20200307
PL  - England
TA  - Water Res
JT  - Water research
JID - 0105072
RN  - 0 (Sewage)
RN  - OP0UW79H66 (Methane)
SB  - IM
MH  - Anaerobiosis
MH  - Biofilms
MH  - Bioreactors
MH  - *Electrons
MH  - Methane
MH  - *Sewage
OTO - NOTNLM
OT  - An-IFFAS
OT  - Biofilm carrier
OT  - CH(4) recovery
OT  - Direct interspecies electron transfer (DIET)
OT  - Graphite
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- 2020/03/17 06:00
MHDA- 2020/04/16 06:00
CRDT- 2020/03/16 06:00
PHST- 2019/12/16 00:00 [received]
PHST- 2020/03/05 00:00 [revised]
PHST- 2020/03/06 00:00 [accepted]
PHST- 2020/03/17 06:00 [pubmed]
PHST- 2020/04/16 06:00 [medline]
PHST- 2020/03/16 06:00 [entrez]
AID - S0043-1354(20)30233-5 [pii]
AID - 10.1016/j.watres.2020.115697 [doi]
PST - ppublish
SO  - Water Res. 2020 May 15;175:115697. doi: 10.1016/j.watres.2020.115697. Epub 2020 
      Mar 7.