Removal of Microcystis aeruginosa by UV-activated persulfate

Performance and characteristics

Journal Article (2016)
Author(s)

Zongping Wang (Huazhong University of Science and Technology)

Yiqun Chen (Huazhong University of Science and Technology)

Pengchao Xie (Huazhong University of Science and Technology)

R. Shang (TU Delft - Sanitary Engineering)

Jun Ma (Harbin Institute of Technology)

Research Group
Sanitary Engineering
Copyright
© 2016 Zongping Wang, Yiqun Chen, Pengchao Xie, R. Shang, Jun Ma
DOI related publication
https://doi.org/10.1016/j.cej.2016.04.125
More Info
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Publication Year
2016
Language
English
Copyright
© 2016 Zongping Wang, Yiqun Chen, Pengchao Xie, R. Shang, Jun Ma
Research Group
Sanitary Engineering
Volume number
300
Pages (from-to)
245-253
Reuse Rights

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Abstract

Cyanobacteria blooms in source waters have become a worldwide issue for drinking water production. UV-activated persulfate (UV/PS) technology was firstly applied to remove cultivated Microcystis aeruginosa (M. aeruginosa) in bench scale. The presence of persulfate significantly enhanced both cytoclasis and algal organic matter mineralization compared with UV-C inactivation alone. Around 98.2% of algal cells were removed after UV/PS process treatment for 2 h at a dosage of PS being 1500 mg/L (approximately 6 mM). Both sulfate and hydroxyl radicals were proven to contribute to the removal of algae and the loss of cell integrity. The cultivated M. aeruginosa in death growth phase were found to be more vulnerable to UV/PS treatment than those growing in log phase, thus a significant lower dosage of PS is needed to achieve the desired removal efficiency. This study suggested a novel application of UV/PS process in the removal of algae in source waters due to the high degradation efficiency of both algal cells and their derived organic matter.

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