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Feasibility of the highly-permselective forward osmosis membrane process for the post-treatment of the anaerobic fluidized bed bioreactor effluent

Authors
Kwon, DaeeunKwon, Soon JinKim, JeonghwanLee, Jung-Hyun
Issue Date
1-7월-2020
Publisher
ELSEVIER
Keywords
Anaerobic fluidized bed bioreactor; Wastewater reuse; Forward osmosis; Thin film composite membranes; Energy
Citation
DESALINATION, v.485
Indexed
SCIE
SCOPUS
Journal Title
DESALINATION
Volume
485
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/54459
DOI
10.1016/j.desal.2020.114451
ISSN
0011-9164
Abstract
A laboratory-made high-performance thin-film composite (TFC) forward osmosis (FO) membrane supported by a polyacrylonitrile (PAN) support was firstly employed to treat the effluent produced by an anaerobic fluidized bed bioreactor (AFBR). Synthetic wastewater was prepared to operate the AFBR, which produced the effluent for the FO process as post-treatment. The performance of the FO membrane was characterized via the measurement of the permeate flux, reverse salt (NaCl) flux and the rejection efficiency of ammonium nitrogen (NH4-N) mostly present in the AFBR effluent having low removal characteristics. An ultrathin and highly-crosslinked polyamide selective layer combined with the PAN support having a low structural parameter of the prepared PAN-supported TFC (PAN-TFC) membrane resulted in higher rejection to both nitrogen and salt compared to a commercial FO membrane. Importantly, the rejection of NH4N higher than 70% was achieved by the PAN TFC FO membrane. At 0.5 M NaCl draw solution, the PAN TFC membrane exhibited the nitrogen flux of 0.92 +/- 0.01 g m(-2) h(-1) and the permeate flux of 25 L m(-2) h(-1). The results demonstrate that the FO membrane can be one of the promising ways to effectively control the removal of contaminants present in AFBR effluent such as NH4N as a post-treatment.
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공과대학 (화공생명공학과)
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