Research Papers

Displaying 1 - 10 of 89
The biosand filter can function in a variety of climates and temperatures, but requires time to adapt to change. The filters should not be allowed to freeze, as this negatively affects the filter's ability to remove bacteria.
Vinegar-amended anaerobic biosand filter for the removal of arsenic and nitrate from groundwater; Snyder, K.V.; Webster, T.M.; Upadhyaya, G.; Hayes, K.F.; Raskin, L., 2016
Reduction of MS2 bacteriophage and rotavirus in biosand filters; Wang, H.; Li, M.; Brockman, K.; Nguyen, T.H., 2016
Evaluation of household drinking water filter distribution programs in Haiti; Rayner, J.; Murray, A.; Joseph, M.; Branz, A.; Lantagne, D., 2016
Investigation of the Effect of Grain Size, Flow Rate and Diffuser Design on the CAWST Biosand Filter Performance; Chan, C.C.V.; Neufeld, K.; Cusworth, D.; Gavrilovic, S.; Ngai, T., 2015
This study investigated the effect of grain size, hydraulic loading rate, batch residence time, and diffuser design on the performance of the CAWST biosand filter. Coarser grain size reduced bacterial removal efficiency. Longer residence time, on the other hand, improved bacteria removal. In terms of diffuser design, smaller holes and tighter spacing reduced bacterial removal efficiency.
Arsenic removal from drinking water by a household sand filter in Vietnam — Effect of filter usage practices on arsenic removal efficiency and microbiological water quality; Nitzsche, K.Sonja; Lan, V.Mai; Trang, P.Thi Kim; Viet, P.Hung; Berg, M.; Voegelin, A.; Planer-Friedrich, B.; Zahoransky, J.; üller, S.K.; Byrne, J.Martin; öder, C.; Behrens, S.; Kappler, A., 2015
Household sand filter in Northern Vietnam consistently reduces arsenic from groundwater by 95% irrespectively of usage practices and sand usage duration. The findings are probably transferable to other sand filters, such as the biosand filter, if similar groundwater compositions (e.g. iron:arsenic ratio >50, phosphate <2.5 mg/L), geological settings, well and sand filter properties exist.