Treatment of industrial wastewater produced by desulfurization process in a coal-fired power plant via FO-MD hybrid process
Type
ArticleKAUST Department
Water Desalination and Reuse Research Center (WDRC)Biological and Environmental Sciences and Engineering (BESE) Division
Date
2018-06-30Online Publication Date
2018-06-30Print Publication Date
2018-11Permanent link to this record
http://hdl.handle.net/10754/630446
Metadata
Show full item recordAbstract
In this study, the feasibility of forward osmosis (FO) hybridized with membrane distillation (MD) was systematically investigated for treating flue gas desulfurization (FGD) wastewater. FO experiments were conducted using raw FGD wastewater obtained from a coal-fired power plant in Korea. Severe membrane fouling in FO was observed since FGD wastewater contained various components (i.e., particles, colloids, organics, and ions). The combined fouling layer by particulates and scales was identified via scanning electron microscope (SEM), energy dispersive X-ray (EDX) and X-ray diffraction (XRD). Therefore, fouling control strategies were suggested and evaluated. Microfiltration (MF) pre-treatment was effective in removing particulates and mitigating the initial fouling. Antiscalant-blended draw solution (DS) could inhibit the formation of membrane scaling. With such fouling control schemes, FO achieved the highest recovery rate compared to other desalting processes (i.e., RO and MD), suggesting that FO is suitable for treating wastewater with high fouling potential and high TDS. Finally, the diluted DS was recovered by MD. MD could re-concentrate the diluted DS up to 50% recovery rate with no significant flux decline. Rapid flux decline was then observed due to membrane scaling. Thus, appropriate antiscalants in DS should be considered to inhibit scaling formation in FO and MD simultaneously.Citation
Lee S, Kim Y, Hong S (2018) Treatment of industrial wastewater produced by desulfurization process in a coal-fired power plant via FO-MD hybrid process. Chemosphere 210: 44–51. Available: http://dx.doi.org/10.1016/j.chemosphere.2018.06.180.Sponsors
This research was supported by a grant (18IFIP-B088091-05) from the Industrial Facilities & Infrastructure Research Program funded by the Ministry of Land, Infrastructure and Transport in Korea.Publisher
Elsevier BVJournal
ChemosphereAdditional Links
http://www.sciencedirect.com/science/article/pii/S0045653518312554ae974a485f413a2113503eed53cd6c53
10.1016/j.chemosphere.2018.06.180