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Membrane Water Treatment
  Volume 12, Number 4, July 2021 , pages 165-175
DOI: https://doi.org/10.12989/mwt.2021.12.4.165
 

Monosodium glutamate as a draw solute for sewage thickening by forward osmosis–nanofiltration
Seungheon Yang, Taaekguen Yun, Soon Bum Kwon, Kyungjin Cho, Seongpil Jeong, Seungkwan Hong and Seockheon Lee

 
Abstract
    Monosodium glutamate (MSG) was evaluated as a draw solute (DS) of forward osmosis–nanofiltration (FO-NF) process for sewage thickening. Water flux (Jw) and reverse draw solute flux (Js) through FO membrane with MSG were compared to those with NaCl as the reference DS. In addition, the influence of MSG to anaerobic digestion of concentrated sewage for methane gas production was investigated. The Js/Jw for MSG was 0.0015mol/L at 1M of initial concentration with a CTA(HTI) membrane, which was 6 % of that for NaCl, while the water flux (Jw) for MSG (ca. 10 L/m2h) was comparable to that for NaCl in FO processes. MSG recovered up to 98% by NF process, which changed with applied membrane and MSG concentration. The collected primary effluent from the full-scale wastewater treatment plant was thickened up to nine times in terms of volumetric concentration factor. The physical membrane flushing by a water could effectively recover the flux. The inhibitory effects of MSG on anaerobic methane production could be negligible and the gas production potential increased.
 
Key Words
    anaerobic toxicity assay; forward osmosis; monosodium glutamate; nanofiltration; reverse solute flux; sewage thickening
 
Address
Seungheon Yang, Taaekguen Yun, Soon Bum Kwon and Seockheon Lee : Water Cycle Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea/ Advanced Environmental Science, Energy Environment Policy and Technology, KU-KIST Green School, Graduate School of Energy and Environment, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea

Kyungjin Cho and Seongpil Jeong: Water Cycle Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea

Seungkwan Hong: Advanced Environmental Science, Energy Environment Policy and Technology, KU-KIST Green School, Graduate School of Energy and Environment, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
 

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