TY - JOUR
T1 - Laboratory and pilot evaluation of aquaporin-based forward osmosis membranes for rejection of micropollutants
AU - Li, Rui
AU - Braekevelt, Sylvie
AU - De Carfort, Johan Le Nepvou
AU - Hussain, Shazad
AU - Bollmann, Ulla E.
AU - Bester, Kai
N1 - Publisher Copyright:
© 2021
PY - 2021/4/15
Y1 - 2021/4/15
N2 - Aquaporin-based forward osmosis (AQP FO) membranes were applied both in laboratory- and pilot-scale for removing micropollutants from water. The effect of operating parameters (feed flow, draw flow, and transmembrane pressure) on the i) rejection of micropollutants, ii) water flux, iii) reverse salt flux, and iv) water recovery of the AQP FO membrane modules was studied. Among the 21 micropollutants spiked, only four compounds, atenolol, propranolol, metoprolol, and citalopram, permeated through the AQP FO membranes to an extent that they could be quantified in the draw solutions of both the laboratory and pilot systems. The rejection rates, based on the full mass balance calculations, were between 96.1% and 99.7%, and all the other 17 compounds showed rejection exceeding 90% on both systems. The pilot AQP FO system was further employed for six days to treat effluent from a membrane bioreactor (MBR) treating municipal wastewater. 35 micropollutants were investigated. 27 of these were identified and quantified in the MBR effluent. Minute fractions of gabapentin, benzotriazole, and metoprolol were detected passing through the AQP FO membranes into the draw side with a constant rejection of around 99.2%, 95.4%, and 99.9%. Almost all other micropollutants’ minimum rejection rates exceeded 80%.
AB - Aquaporin-based forward osmosis (AQP FO) membranes were applied both in laboratory- and pilot-scale for removing micropollutants from water. The effect of operating parameters (feed flow, draw flow, and transmembrane pressure) on the i) rejection of micropollutants, ii) water flux, iii) reverse salt flux, and iv) water recovery of the AQP FO membrane modules was studied. Among the 21 micropollutants spiked, only four compounds, atenolol, propranolol, metoprolol, and citalopram, permeated through the AQP FO membranes to an extent that they could be quantified in the draw solutions of both the laboratory and pilot systems. The rejection rates, based on the full mass balance calculations, were between 96.1% and 99.7%, and all the other 17 compounds showed rejection exceeding 90% on both systems. The pilot AQP FO system was further employed for six days to treat effluent from a membrane bioreactor (MBR) treating municipal wastewater. 35 micropollutants were investigated. 27 of these were identified and quantified in the MBR effluent. Minute fractions of gabapentin, benzotriazole, and metoprolol were detected passing through the AQP FO membranes into the draw side with a constant rejection of around 99.2%, 95.4%, and 99.9%. Almost all other micropollutants’ minimum rejection rates exceeded 80%.
KW - Aquaporin
KW - Biomimetic forward osmosis
KW - Laboratory study
KW - Micropollutants
KW - Pilot Study
UR - http://www.scopus.com/inward/record.url?scp=85101395287&partnerID=8YFLogxK
U2 - 10.1016/j.watres.2021.116924
DO - 10.1016/j.watres.2021.116924
M3 - Article
C2 - 33618109
AN - SCOPUS:85101395287
SN - 0043-1354
VL - 194
JO - Water Research
JF - Water Research
M1 - 116924
ER -