Research Papers

Displaying 31 - 40 of 88
Metallic iron can be effective in water treatment, but then needs to be removed. The authors propose solving this problem by incorporating it into granular media filters like BSF, and provide some theoretical design guidelines.
Households with higher education levels, higher socio-economic status indicator scores, and additional treatment steps were LESS likely to be properly maintaining and operating their BSF, while households with soap were more likely to be doing it properly. Proper filter operation and maintenance of BSF, improved water source, and higher education levels were associated with reduced diarrhoea in households.
Evaluation of the Impact of the Plastic BioSand Filter on Health and Drinking Water Quality in Rural Tamale, Ghana; Stauber, C.E.; Kominek, B.; Liang, K.R.; Osman, M.K.; Sobsey, M.D., 2012
Plastic biosand filters led to a diarrhoea reduction of 60%. Water from the filters had a 97% removal of E. coli.
A randomized controlled trial of the plastic-housing BioSand filter and its impact on diarrheal disease in Copan, Honduras.; Fabiszewski de Aceituno, A.M.; Stauber, C.E.; Walters, A.R.; Meza Sanchez, R.E.; Sobsey, M.D., 2012
Households with plastic BSFs in Honduras had 39% less diarrhoea than households without, but the difference was not statistically significant.
A quick overview of HWTS methods.
BSF's work best at removing bacteria and viruses when they have lower loading heads, lower maximum flow rates, finer sand, and longer pause periods.
A household-scale sand filter incorporating a biomass layer was developed and tested in the laboratory. Filters performed better with thicker biomass layers. Filter effectiveness increased up to day 30, and declined after day 75. (Not a BSF)
Addressing Water Quality Issues in Rural Cameroon with Household Biosand Filters; Klopfenstein, L.; Petrasky, L.; Winton, V.; Brown, J., 2011
Successful implementation of a BSF project requires years of involvement. Users require continued education and reminders to sustain motivation, and quality control of filters being constructed is necessary.
Virus removal in BSF improved with increased pause time and with increased filter ripening. Virus removal appears to be primarily due to the activity of the microbial community.
A BSF which was modified by placing a layer of iron-oxide coated sand inside the filter bed removed E.coli better than a standard BSF. The difference was largest towards the beginning of the filter run.

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