Integrated forward osmosis-membrane distillation process for human urine treatment

Water Research
Qianliang LiuJun Ma

Abstract

This study demonstrated a forward osmosis-membrane distillation (FO-MD) hybrid system for real human urine treatment. A series of NaCl solutions at different concentrations were adopted for draw solutions in FO process, which were also the feed solutions of MD process. To establish a stable and continuous integrated FO-MD system, individual FO process with different NaCl concentrations and individual direct contact membrane distillation (DCMD) process with different feed temperatures were firstly investigated separately. Four stable equilibrium conditions were obtained from matching the water transfer rates of individual FO and MD processes. It was found that the integrated system is stable and sustainable when the water transfer rate of FO subsystem is equal to that of MD subsystem. The rejections to main contaminants in human urine were also investigated. Although individual FO process had relatively high rejection to Total Organic Carbon (TOC), Total Nitrogen (TN) and Ammonium Nitrogen (NH4(+)-N) in human urine, these contaminants could also accumulate in draw solution after long term performance. The MD process provided an effective rejection to contaminants in draw solution after FO process and the integrated system reveal...Continue Reading

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Feb 26, 2014·Environmental Science & Technology·Jiefeng ZhangRichard D Webster

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Citations

Sep 21, 2017·Environmental Technology·Hongwei SongJinrong Liu
Mar 30, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Jie LiXiwang Zhang
Oct 18, 2020·Membranes·Gaetan BlandinXavier Martinez-Lladó
Sep 6, 2018·The Science of the Total Environment·Carina SchneiderClaus Hélix-Nielsen
Mar 9, 2019·Environmental Science & Technology·Youngjin KimNoreddine Ghaffour

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