The aim of this research was to investigate the removal of iron and manganese from groundwater by aeration, chlorine oxidation and microfiltration (MF). Pilot-scale experiments were performed at the Chang-Hua Water Treatment Plant in Taiwan. The raw waters contained soluble iron (0.4 mg/L) and manganese (0.5 mg/L) which were oxidized by chlorine and then filtered by hollow-fiber PTFE-MF. The oxidized particles on membranes under appropriate backwash were also investigated. The particle size and quality of treated water were examined. The experimental results indicated that the concentration of the residual manganese remained greater than 0.1 mg/L in treated water during the initial operation period. However, it decreased to below 0.01 mg/L after 2 weeks processing time. The scanning electron microscopy (SEM) energy dispersive spectroscopy analysis of oxidized metal particles under each process illustrated that the particles accumulated on membrane enhanced removal of iron and manganese, through autocatalytic activity in the accumulated layer on membrane. Moreover, the membrane operation pressure over 120 kPa was suggested for the active backwash process, where no structural damage on membrane was confirmed by SEM analysis.
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Research Article|
September 01 2011
The on-site feasibility study of iron and manganese removal from groundwater by hollow-fiber microfiltration
Wen-Hsiang Chen;
Wen-Hsiang Chen
1Department of Environmental Engineering, National Chung Hsing University, Taichung 40227, Taiwan
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Yung-Hsu Hsieh;
Yung-Hsu Hsieh
1Department of Environmental Engineering, National Chung Hsing University, Taichung 40227, Taiwan
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Chih-Chao Wu;
Chih-Chao Wu
2Department of Environmental Engineering and Science, Feng Chia University, Taichung 40724, Taiwan
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Meng-Wei Wan;
Meng-Wei Wan
3Department of Environmental Engineering and Science, Chia Nan University of Pharmacy and Science, Tainan 71710, Taiwan
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Cybelle Morales Futalan;
Cybelle Morales Futalan
4Department of Environmental Engineering, University of Philippines-Diliman, Quezon City 1800, Philippines
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Chi-Chuan Kan
3Department of Environmental Engineering and Science, Chia Nan University of Pharmacy and Science, Tainan 71710, Taiwan
E-mail: cckanev@mail.chna.edu.tw
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Journal of Water Supply: Research and Technology-Aqua (2011) 60 (6): 391–401.
Article history
Received:
September 20 2010
Accepted:
June 07 2011
Citation
Wen-Hsiang Chen, Yung-Hsu Hsieh, Chih-Chao Wu, Meng-Wei Wan, Cybelle Morales Futalan, Chi-Chuan Kan; The on-site feasibility study of iron and manganese removal from groundwater by hollow-fiber microfiltration. Journal of Water Supply: Research and Technology-Aqua 1 September 2011; 60 (6): 391–401. doi: https://doi.org/10.2166/aqua.2011.067
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