PMID- 32004890
OWN - NLM
STAT- MEDLINE
DCOM- 20200508
LR  - 20221207
IS  - 1879-1298 (Electronic)
IS  - 0045-6535 (Linking)
VI  - 248
DP  - 2020 Jun
TI  - Effects of molecular weight distribution of soluble microbial products (SMPs) on 
      membrane fouling in a membrane bioreactor (MBR): Novel mechanistic insights.
PG  - 126013
LID - S0045-6535(20)30206-X [pii]
LID - 10.1016/j.chemosphere.2020.126013 [doi]
AB  - While molecular weight distribution (MWD) is one of the most important properties 
      of soluble microbial products (SMPs), mechanisms underlying effects of MWD of 
      SMPs on membrane fouling have not well unveiled. In this study, it was found 
      that, the supernatant of sludge suspension in a membrane bioreactor (MBR) for 
      wastewater treatment can be fractionated into a series of SMPs samples with 
      different molecular weight (MW) fraction. The real gel sample mainly formed by 
      the rejected SMPs on membrane surface had a high specific filtration resistance 
      (SFR) of 1.21 x 10(16) m(-1) kg(-1). The SFR of SMPs samples and the model 
      foulants of polyethylene glycol (PEG) increased with their MW. The change trend 
      of SFR with MW cannot be sufficiently explained by three-dimensional 
      excitation-emission matrix (EMM) and chemical compositions. Tyndall effect 
      analysis indicated that gelating ability of SMPs and PEG in the solution 
      increased with their MW. Scanning electron microscope (SEM) confirmed gel 
      structure changes with the PEG MW. Accordingly, mechanisms based on Carman-Kozeny 
      equation and Flory-Huggins lattice theory were proposed to interpret SFR of SMPs 
      with low and high MW, respectively. Simulating these two mechanistic models on 
      PEG samples resulted in the comparable SFR data to the experimental ones, 
      indicating the correctness and feasibility of the proposed mechanisms. The 
      proposed mechanisms provided in-depth understanding of membrane fouling regarding 
      MW, facilitating to develop effective membrane fouling mitigation strategies.
CI  - Copyright (c) 2020 Elsevier Ltd. All rights reserved.
FAU - Teng, Jiaheng
AU  - Teng J
AD  - College of Geography and Environmental Sciences, Zhejiang Normal University, 
      Jinhua, 321004, China.
FAU - Shen, Liguo
AU  - Shen L
AD  - College of Geography and Environmental Sciences, Zhejiang Normal University, 
      Jinhua, 321004, China.
FAU - Xu, Yanchao
AU  - Xu Y
AD  - College of Geography and Environmental Sciences, Zhejiang Normal University, 
      Jinhua, 321004, China.
FAU - Chen, Yifeng
AU  - Chen Y
AD  - College of Geography and Environmental Sciences, Zhejiang Normal University, 
      Jinhua, 321004, China.
FAU - Wu, Xi-Lin
AU  - Wu XL
AD  - College of Geography and Environmental Sciences, Zhejiang Normal University, 
      Jinhua, 321004, China.
FAU - He, Yiming
AU  - He Y
AD  - Department of Materials Science and Engineering, Zhejiang Normal University, 
      Jinhua, 321004, China.
FAU - Chen, Jianrong
AU  - Chen J
AD  - College of Geography and Environmental Sciences, Zhejiang Normal University, 
      Jinhua, 321004, China. Electronic address: cjr@zjnu.cn.
FAU - Lin, Hongjun
AU  - Lin H
AD  - College of Geography and Environmental Sciences, Zhejiang Normal University, 
      Jinhua, 321004, China. Electronic address: hjlin@zjnu.cn.
LA  - eng
PT  - Journal Article
DEP - 20200125
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 0 (Gels)
RN  - 0 (Membranes, Artificial)
RN  - 0 (Sewage)
RN  - 0 (Waste Water)
SB  - IM
MH  - Bioreactors/microbiology
MH  - Filtration
MH  - Gels
MH  - *Membranes, Artificial
MH  - Molecular Weight
MH  - Sewage/chemistry
MH  - Waste Disposal, Fluid/*methods
MH  - Wastewater
OTO - NOTNLM
OT  - Membrane bioreactor
OT  - Membrane fouling
OT  - Molecular weight distribution
OT  - Soluble microbial products
OT  - Wastewater treatment
EDAT- 2020/02/01 06:00
MHDA- 2020/05/10 06:00
CRDT- 2020/02/01 06:00
PHST- 2019/11/25 00:00 [received]
PHST- 2020/01/12 00:00 [revised]
PHST- 2020/01/22 00:00 [accepted]
PHST- 2020/02/01 06:00 [pubmed]
PHST- 2020/05/10 06:00 [medline]
PHST- 2020/02/01 06:00 [entrez]
AID - S0045-6535(20)30206-X [pii]
AID - 10.1016/j.chemosphere.2020.126013 [doi]
PST - ppublish
SO  - Chemosphere. 2020 Jun;248:126013. doi: 10.1016/j.chemosphere.2020.126013. Epub 
      2020 Jan 25.