title: Algae separation from urban landscape water using a high density microbubble layer enhanced by micro-flocculation.
abstract: 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.
authors.affiliation: Key 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.
authors.forename: Shuwen
authors.initials: S
authors.lastname: Chen
authors.affiliation: Key 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.
authors.forename: Jingcheng
authors.initials: J
authors.lastname: Xu
authors.affiliation: Key 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.
authors.forename: Jia
authors.initials: J
authors.lastname: Liu
authors.affiliation: Key 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.
authors.forename: Qiaoling
authors.initials: Q
authors.lastname: Wei
authors.affiliation: Key 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.
authors.forename: Guangming
authors.initials: G
authors.lastname: Li
authors.affiliation: Key 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.
authors.forename: Xiangfeng
authors.initials: X
authors.lastname: Huang
mesh_terms: D005068:Eutrophication; D005427:Flocculation; D005618:Fresh Water; D045423:Microbubbles; D015233:Models, Statistical; D009584:Nitrogen; D010758:Phosphorus; D011312:Pressure; D014867:Water; D014873:Water Pollutants / Q000302:isolation & purification; D018508:Water Purification / Q000379:methods*
chemical_list: D014873:Water Pollutants; D014867:Water; D010758:Phosphorus; D009584:Nitrogen