Research Papers

Displaying 21 - 30 of 90
Biosand filters operated with one, two, or three day residence periods did not have statistically significant differences in E. coli removal.
MS2 Bacteriophage Reduction and Microbial Communities in Biosand Filters.; Wang, H.; Narihiro, T.; Straub, A.P.; Pugh, C.R.; Tamaki, H.; Moor, J.F.; Bradley, I.M.; Kamagata, Y.; Liu, W.T.; Nguyen, T.H., 2014
Virus removal in V10 BSFs was greater than 99.99% after only 43 days of operation. Important factors included length of residence time, filter depth, and filter ripening, with the schmutzdecke playing an important role. Diverse microbial communities were found throughout the filter depth.
Using a biosand filter project by DHAN Foundation in India as a case study, this computer model outlines how an NGO can choose effective programme implementation strategies to increase the adoption and consistent use of household water treatment technologies in consideration of complex system interactions, trade-offs, and counter-intuitive outcomes.
Moving concrete and plastic bucket biosand filters 1 km after 9 months of operation reduced the hydraulic loading rate, but significantly increased E. coli removal.
A field study in Nicaragua found that biosand filters removed bacteria even when they were operated imperfectly, but recontamination of water was a problem.
Like slow sand filters, BSFs are not effective at removing hormones from drinking water. Chlorinating after filtration can improve removal, but chlorine is most effective concentrations which are higher than generally used.
The human effort required in a water intervention, such as BSF, over its lifespan (i.e. in construction, during use) should be considered when comparing alternatives, along with the gender distribution of that effort.
Bacterial contamination on household toys and association with water, sanitation and hygiene conditions in Honduras.; Stauber, C.E.; Walters, A.; Fabiszewski de Aceituno, A.M.; Sobsey, M.D., 2013
Water and sanitation indicators, such as having a BSF or a latrine, are associated with lower levels of bacterial contamination on children's toys in households.
A modification to the BSF was developed to allow for a continuous flow rate, improving the filter's ability to remove microbes. An additional modification to use sheet metal for the body was also tested successfully.