PMID- 35635920
OWN - NLM
STAT- MEDLINE
DCOM- 20220621
LR  - 20220621
IS  - 1879-2448 (Electronic)
IS  - 0043-1354 (Linking)
VI  - 220
DP  - 2022 Jul 15
TI  - Ultrafiltration significantly increased the scaling potential of municipal 
      secondary effluent on reverse osmosis membranes.
PG  - 118672
LID - S0043-1354(22)00625-X [pii]
LID - 10.1016/j.watres.2022.118672 [doi]
AB  - Ultrafiltration (UF) was often used as pretreatment in front of reverse osmosis 
      (RO) unit because of its high rejection efficiency of microbes and particles. 
      However, in some cases UF pretreatment might show adverse effects on the RO 
      membrane flux. In this study, the effects of UF pretreatment on secondary 
      effluent water quality and its RO membrane fouling characteristics were explored. 
      There was almost no change of water quality after UF with different molecular 
      weight cut-off (MWCO) membranes (100, 30 and 10 kDa), including total dissolved 
      solid (TDS), alkalinity, conductivity, ion concentrations, etc., while pH 
      increased a little and dissolved organic carbon (DOC) declined by about 1 mg/L. 
      On the contrary, the RO membrane flux of UF permeates presented clear decline in 
      comparison to the secondary effluent. The membrane fouling velocity and 
      steady-state flux of secondary effluent was 0.052 and 0.656, while fouling 
      velocity increased (0.077, 0.071, 0.067) and steady-state flux decreased 
      significantly (0.397, 0.416, 0.448) after 100, 30, 10 kDa UF membrane 
      pretreatment. Scanning electron microscope (SEM) images showed many crystals on 
      the fouled membrane surfaces, which turned out to be CaCO(3) by Energy dispersive 
      spectrometer (EDS) analysis and precipitation calculation. After the addition of 
      UF retentates to UF permeates, scaling was prevented and crystals on the RO 
      membrane almost disappeared, which implied the anti-scaling effect of the UF 
      retentates with low concentration. According to anti-scaling performance 
      experiments, the anti-scaling performance of 100 k, 30 k, 10 k retentates was 
      2.7%, 4.0% and 7.3%, respectively. Excitation emission matrix (EEM) and fourier 
      transform infra-red (FTIR) results showed that these retentates retained by 
      different MWCO membranes were similar and composed of protein-like substances and 
      soluble microbial products. The effect of key minority components in RO system 
      deserved further exploration.
CI  - Copyright (c) 2022 Elsevier Ltd. All rights reserved.
FAU - Tong, Xin
AU  - Tong X
AD  - Environmental Simulation and Pollution Control State Key Joint Laboratory, State 
      Environmental Protection Key Laboratory of Microorganism Application and Risk 
      Control (SMARC), School of Environment, Tsinghua University, Room 524, Beijing 
      100084, PR China.
FAU - Zhang, Zi-Wei
AU  - Zhang ZW
AD  - Environmental Simulation and Pollution Control State Key Joint Laboratory, State 
      Environmental Protection Key Laboratory of Microorganism Application and Risk 
      Control (SMARC), School of Environment, Tsinghua University, Room 524, Beijing 
      100084, PR China.
FAU - Wu, Yin-Hu
AU  - Wu YH
AD  - Environmental Simulation and Pollution Control State Key Joint Laboratory, State 
      Environmental Protection Key Laboratory of Microorganism Application and Risk 
      Control (SMARC), School of Environment, Tsinghua University, Room 524, Beijing 
      100084, PR China; Beijing Laboratory for Environmental Frontier Technologies, 
      Beijing 100084, PR China. Electronic address: wuyinhu@mail.tsinghua.edu.cn.
FAU - Bai, Yuan
AU  - Bai Y
AD  - Environmental Simulation and Pollution Control State Key Joint Laboratory, State 
      Environmental Protection Key Laboratory of Microorganism Application and Risk 
      Control (SMARC), School of Environment, Tsinghua University, Room 524, Beijing 
      100084, PR China.
FAU - Ikuno, Nozomu
AU  - Ikuno N
AD  - Kurita Water Industries Ltd., Nakano-ku, Tokyo 164-0001, Japan.
FAU - Ishii, Kazuki
AU  - Ishii K
AD  - Kurita Water Industries Ltd., Nakano-ku, Tokyo 164-0001, Japan.
FAU - Hu, Hong-Ying
AU  - Hu HY
AD  - Environmental Simulation and Pollution Control State Key Joint Laboratory, State 
      Environmental Protection Key Laboratory of Microorganism Application and Risk 
      Control (SMARC), School of Environment, Tsinghua University, Room 524, Beijing 
      100084, PR China; Research Institute for Environmental Innovation (Suzhou), 
      Tsinghua, Suzhou, Jiangsu 215163, PR China.
LA  - eng
PT  - Journal Article
DEP - 20220526
PL  - England
TA  - Water Res
JT  - Water research
JID - 0105072
RN  - 0 (Membranes, Artificial)
SB  - IM
MH  - Filtration
MH  - Membranes, Artificial
MH  - Osmosis
MH  - *Ultrafiltration/methods
MH  - *Water Purification/methods
OTO - NOTNLM
OT  - Antiscaling effect
OT  - Reverse osmosis membrane fouling
OT  - Scaling
OT  - Ultrafiltration pretreatment
EDAT- 2022/06/01 06:00
MHDA- 2022/06/22 06:00
CRDT- 2022/05/31 13:03
PHST- 2021/12/19 00:00 [received]
PHST- 2022/05/17 00:00 [revised]
PHST- 2022/05/23 00:00 [accepted]
PHST- 2022/06/01 06:00 [pubmed]
PHST- 2022/06/22 06:00 [medline]
PHST- 2022/05/31 13:03 [entrez]
AID - S0043-1354(22)00625-X [pii]
AID - 10.1016/j.watres.2022.118672 [doi]
PST - ppublish
SO  - Water Res. 2022 Jul 15;220:118672. doi: 10.1016/j.watres.2022.118672. Epub 2022 
      May 26.