Publisher DOI: 10.2166/wst.2017.166
Title: Advanced phosphorus removal via coagulation, flocculation and microsieve filtration in tertiary treatment
Language: English
Authors: Langer, Margarethe 
Väänänen, Janne 
Boulestreau, Morgane 
Miehe, Ulf 
Bourdon, C. 
Lesjean, Boris 
Keywords: Advanced phosphorus removal; Coagulation; Flocculation; Microsieve
Issue Date: 2017
Publisher: IWA Publishing
Source: Water Science and Technology 12 (75): 2875-2882 (2017-06-01)
Abstract (english): 
The applicability of microsieve technology together with coagulation and flocculation for advanced phosphorus removal was investigated. A pilot unit including a microsieve with 10 μm mesh size was operated continuously with secondary effluent from Ruhleben wastewater treatment plant in Berlin. By applying a pretreatment of 0.07-0.09 mmol/L (as metal) coagulant and 1.5-2 mg/L cationic polymer, total phosphorus values below 80 μg/L were achieved. Coagulation with polyaluminum chloride (PACl) produced a better effluent quality compared to FeCl3, as less suspended solids and less residual coagulant were found in the microsieve effluent. In addition, the transmittance of UV radiation through the water was improved by using PACl. The produced amount of backwash water was always below 3% (on average 1.6%). Under optimized mixing conditions, polymer doses of 0.6 mg/L were possible without losses in water quality and filtration performance. Microsieving with chemical pretreatment is a viable option for high quality effluent polishing.
ISSN: 1996-9732
Journal: Water science and technology 
Institute: Wasserressourcen und Wasserversorgung B-11 
Document Type: Article
Project: Entfernung von Cr(VI) aus Grundwasser durch chemische Reduktion, Koagulation und Membranfiltration 
More Funding information: This project was sponsored by Berliner Wasserbetriebe and Veolia and co-financed by the Senate of Berlin and the European Union (European Regional Development Fund).
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