Excessive phosphorus in aquatic systems causes algal bloom resulting in eutrophication. To treat wastewater including effluent of wastewater treatment plant containing various amounts of phosphorus, a series of continuous experiments on removal of phosphorus from water were performed by using an electrochemical method. The spherical type of zero valent iron (ZVI) and silica sand were packed at appropriate volume ratio of 1:2 in a cylindrical column. An electric potential was applied externally, which can be changed as per the operational requirement. The results indicate that optimum hydraulic retention time of 36 min was required to meet the effluent standards with our laboratory-scale experimental setup. Lower amounts of phosphorus were removed by precipitation due to contact with iron, and additional electric potential was not required. In order to remove high amounts of phosphorus (around 150 mg/L as phosphate), external electric potential of 600 V was applied to the reactor. As the precipitation of phosphate mainly occurs at neutral pH, it is likely that FeHPO4 will be the main phosphorus-containing compound. Through the results of the large-scale experiments, the ZVI packed reactor can be used as a filter for removal of phosphorus of less than 10 mg/L as phosphate concentration.
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Research Article|
July 09 2014
Continuous phosphorus removal from water by physicochemical method using zero valent iron packed column Available to Purchase
Joo-Young Jeong;
Joo-Young Jeong
1Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, Republic of Korea
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Byoung-Min Ahn;
Byoung-Min Ahn
1Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, Republic of Korea
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Yu-Jin Kim;
Yu-Jin Kim
1Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, Republic of Korea
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Joo-Yang Park
1Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, Republic of Korea
E-mail: [email protected]
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Water Sci Technol (2014) 70 (5): 895–900.
Article history
Received:
November 06 2013
Accepted:
June 30 2014
Citation
Joo-Young Jeong, Byoung-Min Ahn, Yu-Jin Kim, Joo-Yang Park; Continuous phosphorus removal from water by physicochemical method using zero valent iron packed column. Water Sci Technol 1 September 2014; 70 (5): 895–900. doi: https://doi.org/10.2166/wst.2014.310
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