Abstract
Abstract. This study examined the performance of a low-cost ceramic candle filter system (CCFS) for point of use (POU) drinking water treatment in the village of Hobeni, Eastern Cape Province, South Africa. CCFSs were distributed in Hobeni and a survey was carried out among their users. The performance of 51 CCFSs was evaluated by dip slides and related to human factors. Already after two-thirds of their specified lifetime, none of the distributed CCFSs produced water without distinct contamination, and more than one-third even deteriorated in hygienic water quality. Besides the water source (springs were preferable compared to river or rain water), a high water throughput was the dominant reason for poor CCFS performance. A stepwise laboratory test documented the negative effects of repeated loading and ambient field temperatures. These findings suggest that not every CCFS type per se guarantees improved drinking water security and that the efficiency of low-cost systems should continuously be monitored. For this purpose, dip slides were found to be a cost-efficient alternative to standard laboratory tests. They consistently underestimated microbial counts but can be used by laypersons and hence by the users themselves to assess critical contamination of their filter systems.
Subject
Pollution,Water Science and Technology,Civil and Structural Engineering
Reference40 articles.
1. Ahammed, M. N. and Davra, K.: Performance evaluation of biosand filter modified with iron oxide-coated sand for household treatment of drinking water, Desalination, 276, 287–293, https://doi.org/10.1016/j.desal.2011.03.065, 2011.
2. Ali Baig, S., Mahmood, Q., Nawab, B., Shafqat, M. N., and Pervez, A.: Improvement of drinking water quality by using plant biomass through household biosand filter – A decentralized approach, Ecol. Eng., 37, 1842–1848, https://doi.org/10.1016/j.ecoleng.2011.06.011, 2011.
3. Barth, M.: Belastung und Beanspruchung durch biologische Arbeitsstoffe bei Kühlschmiermittel-Exponierten in der Metallbearbeitung, Dissertation, Heinrich-Heine-University Düsseldorf, Düsseldorf, 2003 (in German).
4. Bielefeldt, A. R., Kowalski, K., and Summers, R. S.: Bacterial treatment effectiveness of point-of-use ceramic water filters, Water Res. 43, 3559–3565, https://doi.org/10.1016/j.watres.2009.04.047, 2009.
5. Brady, M. J., Lisay, C. M., Yurkovetskiy, A. V., and Sawan, S. P.: Persistent silver disinfectant for the environmental control of pathogenic bacteria, Am. J. Infect. Control, 31, 208–214, 2003.
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