Eutrophication of raw water results in outbreaks of algae, which hinders conventional water treatment. In this study, high density microbubble layers combined with micro-flocculation was adopted to remove algae from urban landscape water, and the effects of pressure, hydraulic loading, microbubble layer height and flocculation dosage on the removal efficiency for algae were studied. The greatest removal efficiency for algae, chemical oxygen demand, nitrogen and phosphorus was obtained at 0.42 MPa with hydraulic loading at 5 m/h and a flocculation dosage of 4 mg/L using a microbubble layer with a height of 130 cm. Moreover, the size, clearance distance and concentration of microbubbles were found to be affected by pressure and the height of the microbubble layer. Based on the study, this method was an alternative for algae separation from urban landscape water and water purification.
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Research Article|July 02 2014
Algae separation from urban landscape water using a high density microbubble layer enhanced by micro-flocculation
Shuwen Chen
Shuwen Chen
1Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092 China
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Jingcheng Xu
Jingcheng Xu
1Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092 China
E-mail: xujick@tongji.edu.cn
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Jia Liu
Jia Liu
1Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092 China
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Qiaoling Wei
Qiaoling Wei
1Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092 China
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Guangming Li
Guangming Li
1Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092 China
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Xiangfeng Huang
Xiangfeng Huang
1Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092 China
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Water Sci Technol (2014) 70 (5): 811-818.
Article history
Received:
September 11 2013
Accepted:
May 27 2014
Citation
Shuwen Chen, Jingcheng Xu, Jia Liu, Qiaoling Wei, Guangming Li, Xiangfeng Huang; Algae separation from urban landscape water using a high density microbubble layer enhanced by micro-flocculation. Water Sci Technol 1 September 2014; 70 (5): 811–818. doi: https://doi.org/10.2166/wst.2014.258
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