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
This study developed a low-cost and accurate method for field enumeration of Vibrio cholerae. Additionally, the removal efficiency of V. cholerae and coliform bacteria using biosand filtration was evaluated. Results indicate that coliform removal efficiency generally exceeded V. cholerae removal, thus highlighting the importance of conducting pathogen specific tests rather than relying completely on indicator organisms.
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.