Linking UF reversible and irreversible fouling to the water quality of surface water and treated municipal wastewater

The interdependencies between water quality parameters and ultrafiltration characteristics (reversible, and irreversible fouling) of surface water (SW) in comparison with treated domestic wastewater (TDW) were systematically investigated. A focus was set to the macromolecular dissolved fraction (“bi...

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Bibliographic Details
Published in:Desalination and water treatment 2014-12, Vol.52 (40-42), p.7598-7608
Main Authors: Zietzschmann, Frederik, Ernst, Mathias, Godehardt, Manuel, Paar, Hendrik, Zheng, Xing, Jekel, Martin
Format: Article
Language:English
Subjects:
Biopolymers
Correlation
Fouling
Irreversible fouling
Organic fouling
Secondary effluent
Summer
Surface water
Temperature
Trends
Ultrafiltration
Waste water
Water quality
Winter
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Summary:The interdependencies between water quality parameters and ultrafiltration characteristics (reversible, and irreversible fouling) of surface water (SW) in comparison with treated domestic wastewater (TDW) were systematically investigated. A focus was set to the macromolecular dissolved fraction (“biopolymers”), accounting for about 50% of the full fouling resistance. Correlation matrices were used to point out overall differences of both waters, whereas seasonal monitoring was used to reveal different inter-annual variability. The correlation matrices show that biopolymer concentration significantly correlates with total and reversible fouling of both waters but not with irreversible fouling. The membrane rejection of SW biopolymers showed significant correlations to all parameters (biopolymer concentration, reversibility, etc.). We found significant correlations of temperature with total and reversible fouling (positive in SW but negative in TDW) and irreversible fouling (negative in SW but positive in TDW). Therefore, temperature is suggested as a very handy indicator for total/reversible fouling and especially irreversible fouling. Seasonally, the SW biopolymer concentration shows a clear development (high in summer and low in winter); no comparable trend was observed for TDW. Filtration parameters are clearly subject to seasonal variation. The irreversible amount of SW-induced fouling was maximal in winter and minimal in summer, whereas treated TDW-related variability was lacking such obvious trends.
ISSN:1944-3986
1944-3994
1944-3986
DOI:10.1080/19443994.2013.834271