Micro-coagulation effects on direct ultrafiltration of challenging raw river water
Visualitza/Obre
Cita com:
hdl:2117/102566
Tipus de documentArticle
Data publicació2016-12-01
Condicions d'accésAccés obert
Llevat que s'hi indiqui el contrari, els
continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
:
Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
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 Industry
CitacióFerrer, O., Dekker, R., Mesa, J., Martín-Alonso, J., Cortina, J., Gibert, O. Micro-coagulation effects on direct ultrafiltration of challenging raw river water. "Journal of chemical technology & biotechnology", 1 Desembre 2016, vol. 91, núm. 12, p. 2959-2973.
ISSN0268-2575
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
Article Microcoagulation-proof.pdf | 5,068Mb | Visualitza/Obre |