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research
Micro-coagulation effects on direct ultrafiltration of challenging raw river water
Authors
Barbot
Blankert
+51 more
Boulestreau
Chen
Choi
Clever
Domínguez
Doyen
Edzwald
Edzwald
Fan
Ferrer
Ferrer
Fiksdal
Fitzpatrick
Futselaar
Gibert
Heijman
Hlavacek
Hofman
Howe
Huang
Huber
Hutzinger
Iritani
Jermann
Jiang
Judd
Kim
Konieczny
Konieczny
Lai
Ma
Meyn
Neubrand
Oosterom
Pearce
Pearce
Pianta
Pikkarainen
Rojas
Salinas Rodríguez
Schlichter
Sripui
Tabatabai
Taniguchi
Vos
Wang
Wiesner
Zheng
Zheng
Zularisam
Zupančič
Publication date
1 January 2016
Publisher
'Wiley'
Doi
Cite
Abstract
Background The feasibility and competitiveness of substituting the conventional pre-treatment of drinking water treatment plants (dioxichlorination, coagulation/flocculation, settling, sand filtration) by raw river water direct ultrafiltration (UF) was addressed. Results A full scale UF module was operated continuously for 2 years, treating highly variable surface water. The sustainable hydraulic conditions leading to a greater water yield from the direct UF treatment scheme under different scenarios were defined. Summer periods enabled the attainment of higher filtration fluxes, although raw river water showed greater turbidity and total suspended solids content. Winter periods presented higher dissolved organic carbon concentration, with greater biopolymers content, which have been claimed as main membrane foulants. A preliminary micro-coagulation of FeCl3 (<1.5 mg Fe(III) L-1) enabled supporting harsher hydraulic conditions and thus, implementing similar conditions throughout the year. Impacts of micro-coagulation were more pronounced on filtration, particularly in winter, but a positive effect was also noticed in hydraulic and chemical cleaning stages, increasing the efficiency of the former and decreasing by half the frequency of the latter. Conclusion Direct UF proved to be competitive with the current conventional pre-treatment, leading to a significant reduction in reagents needs and sludge production and an increased and more stable product water quality. © 2016 Society of Chemical IndustryPeer ReviewedPostprint (author's final draft
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oai:upcommons.upc.edu:2117/102...
Last time updated on 01/05/2017
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info:doi/10.1002%2Fjctb.4916
Last time updated on 26/03/2019