High flow ceramic pot filters

Journal Article (2017)
Author(s)

D. van Halem (TU Delft - Sanitary Engineering)

H. van der Laan (Oasen)

A. I.A. Soppe (Aqua for All)

Sebastiaan Heijman (TU Delft - Sanitary Engineering)

Research Group
Sanitary Engineering
Copyright
© 2017 D. van Halem, H. van der Laan, A. I.A. Soppe, Sebastiaan Heijman
DOI related publication
https://doi.org/10.1016/j.watres.2017.07.045
More Info
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Publication Year
2017
Language
English
Copyright
© 2017 D. van Halem, H. van der Laan, A. I.A. Soppe, Sebastiaan Heijman
Research Group
Sanitary Engineering
Volume number
124
Pages (from-to)
398-406
Reuse Rights

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Abstract

Ceramic pot filters are considered safe, robust and appropriate technologies, but there is a general consensus that water revenues are limited due to clogging of the ceramic element. The objective of this study was to investigate the potential of high flow ceramic pot filters to produce more water without sacrificing their microbial removal efficacy. High flow pot filters, produced by increasing the rice husk content, had a higher initial flow rate (6–19 L h−1), but initial LRVs for E. coli of high flow filters was slightly lower than for regular ceramic pot filters. This disadvantage was, however, only temporarily as the clogging in high flow filters had a positive effect on the LRV for E. coli (from below 1 to 2–3 after clogging). Therefore, it can be carefully concluded that regular ceramic pot filters perform better initially, but after clogging, the high flow filters have a higher flow rate as well as a higher LRV for E. coli. To improve the initial performance of new high flow filters, it is recommended to further utilize residence time of the water in the receptacle, since additional E. coli inactivation was observed during overnight storage. Although a relationship was observed between flow rate and LRV of MS2 bacteriophages, both regular and high flow filters were unable to reach over 2 LRV.