Research Papers

Displaying 31 - 40 of 89
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.
Hydraulic Loading Rate Effect on Removal Rates in a BioSand Filter: A Pilot Study of Three Conditions; Kennedy, T.J.; Hernandez, E.A.; Morse, A.N.; Anderson, T.A., 2012
(Caution: This study did not have replicates) Reducing the initial flow rate in Hydraid filters, by modifying the outlet pipe, did not significantly improve E.coli reduction.
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.
A household-scale sand filter was developed and tested in Pakistan. In the field test it removed 97% E.coli, Total Coliforms, and turbidity. (Not a BSF)
Households which were using BSF had 61% less diarrhoea. After one year, 90% of BSF's were still in use, and were removing 88.4% of E. coli.