TY - JOUR
T1 - Electrically charged forward osmosis
T2 - Promoting reverse salt flux to enhance water recovery and struvite precipitation
AU - Kekre, Kartikeya M.
AU - Tiburcio, Diana
AU - Ronen, Avner
AU - Suri, Rominder
AU - Andaluri, Gangadhar
AU - Yuan, Heyang
N1 - Publisher Copyright:
© 2022
PY - 2022/11/1
Y1 - 2022/11/1
N2 - Agricultural wastewater contains high concentrations of nitrogen and phosphorus. There is a growing interest in recovering these nutrients. In this study, an electrically charged forward osmosis (eFO) system was developed to recover struvite and water from synthetic livestock wastewater. By applying a voltage near the surface of the FO membrane, magnesium migrated reversely into the feed chamber and reacted with the ammonium and phosphate in the feed solution to form struvite. As a result of electrical charging, the recovery of struvite and water was enhanced by 77% and 39%, respectively. The enhancement might be because dilutive and concentrative polarization was alleviated on the draw and feed side of the FO membrane during ion migration. High external voltage, high draw concentration, and alkaline/neutral draw pH favored water recovery and struvite precipitation. This study provides insights into harnessing reverse salt flux to improve the recovery of nutrients and water in FO systems.
AB - Agricultural wastewater contains high concentrations of nitrogen and phosphorus. There is a growing interest in recovering these nutrients. In this study, an electrically charged forward osmosis (eFO) system was developed to recover struvite and water from synthetic livestock wastewater. By applying a voltage near the surface of the FO membrane, magnesium migrated reversely into the feed chamber and reacted with the ammonium and phosphate in the feed solution to form struvite. As a result of electrical charging, the recovery of struvite and water was enhanced by 77% and 39%, respectively. The enhancement might be because dilutive and concentrative polarization was alleviated on the draw and feed side of the FO membrane during ion migration. High external voltage, high draw concentration, and alkaline/neutral draw pH favored water recovery and struvite precipitation. This study provides insights into harnessing reverse salt flux to improve the recovery of nutrients and water in FO systems.
KW - Forward osmosis
KW - Livestock wastewater
KW - Reverse salt flux
KW - Struvite recovery
UR - http://www.scopus.com/inward/record.url?scp=85134322705&partnerID=8YFLogxK
U2 - 10.1016/j.resconrec.2022.106522
DO - 10.1016/j.resconrec.2022.106522
M3 - Article
AN - SCOPUS:85134322705
SN - 0921-3449
VL - 186
JO - Resources, Conservation and Recycling
JF - Resources, Conservation and Recycling
M1 - 106522
ER -
