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http://dx.doi.org/10.11001/jksww.2018.32.1.047

Coagulation-membrane separation hybrid treatment of secondary treated effluent for high efficiency phosphorus removal  

Choi, Wookjin (Center for Water Resource Cycle Research, Korea Institute of Science and Technology)
Lee, Byungha (KG Chemical Co. Ltd.)
Park, Joonhong (School of Civil and Environmental Engineering, Yonsei University)
Cha, Hoyoung (Zignentech Co. Ltd.)
Lee, Byungchan (Department of Civil Engineering and Landscape Architecture, Suncheon Jeil College)
Song, Kyungguen (Center for Water Resource Cycle Research, Korea Institute of Science and Technology)
Publication Information
Journal of Korean Society of Water and Wastewater / v.32, no.1, 2018 , pp. 47-53 More about this Journal
Abstract
This study investigated phosphorus removal from secondary treated effluent using coagulation-membrane separation hybrid treatment to satisfy strict regulation in wastewater treatment. The membrane separation process was used to remove suspended phosphorus particles after coagulation/settlement. Membrane separation with $0.2{\mu}m$ pore size of micro filtration membrane could reduce phosphorus concentration to 0.02 mg P/L after coagulation with 1 mg Al/L dose of polyaluminum chloride (PACl). Regardless of coagulant, the residual concentration of phosphorus decreased as the dose increased from 1.5 to 3.5 mg Al/L, while the target concentration of 0.05 mg P/L or less was achieved at 2.5 mg Al/L for the aluminum sulfate (Alum) and 3.5 mg Al/L for PACl. Moreover, alum showed better membrane flux as make bigger particles than PACl. Alum showed a 40% of flux decrease at 2.5 mg Al/L dose, while PACl indicated a 50% decrease of membrane flux even with a higher dose of 3.5 mg Al/L. Thus, alum was more effective coagulant than PACl considering phosphorus removal and membrane flux as well as its dose. Consequently, the coagulation-membrane separation hybrid treatment could be mitigate regulation on phosphorus removal as unsettleable phosphorus particles were effectively removed by membrane after coagulation.
Keywords
Coagulation; High efficiency removal; Membrane separation; Phosphorus removal; Wastewater treatment;
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Times Cited By KSCI : 1  (Citation Analysis)
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