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|Title:||FOULING AND SCALING STUDIES OF ELECTRODIALYSIS REVERSAL (EDR) FOR HIGH WATER RECOVERY APPLICATION||Authors:||SEAN CHUA WEIZONG||Keywords:||Electrodialysis Reversal, Fouling, High water recovery, RO Concentrate||Issue Date:||16-Aug-2018||Citation:||SEAN CHUA WEIZONG (2018-08-16). FOULING AND SCALING STUDIES OF ELECTRODIALYSIS REVERSAL (EDR) FOR HIGH WATER RECOVERY APPLICATION. ScholarBank@NUS Repository.||Abstract:||Reverse osmosis (RO) is widely implemented to either desalinate or reclaim water to meet increasing water demand. Typically, RO can achieve 50 – 75% water recovery. However, increasing beyond the RO’s water recovery rate of 75% would pose limitations such as scaling risk and energy inefficiency. Thus, a solution is required to further increase the water recovery rate. In this thesis, electrodialysis reversal (EDR) was explored as a solution to increase overall water recovery. As the RO concentrate (ROC) contained high concentration of organic compounds, lab-scale experiments and pilot-scale EDR were conducted with ROC as feed water to identify fouling and scaling risks in the EDR. The effects of pre-treatment chemicals (anti-scalants and disinfectants) on the EDR membranes were investigated in lab-scale experiments. Moreover, a pilot-scale EDR was monitored over one year and a dosing regimen was implemented to observe any improvement in the performance and operation.||URI:||http://scholarbank.nus.edu.sg/handle/10635/150315|
|Appears in Collections:||Master's Theses (Open)|
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