Construction & Installation

Proper construction of the filter box, preparation of the media, and installation of the sand is challenging, but is of critical importance to the effectiveness of the biosand filter. This section of the website explores some of the challenges which the BSF technician may face.

Designs & Modifications

Why is the present V10 biosand filter the way that it is? What about building a filter out of PVC pipe, or sheet metal? What is a Kanchan filter? This section of the website looks at the history and rational behind the biosand filter design, and alternative designs for the biosand filter.

Operation & Maintenance

The biosand filter is a living ecosystem. This section explores challenges related to how to use and maintain a biosand filter to ensure it remains effective.

Performance

Results of trials showing biosand filter performance at removing different contaminants and under different conditions.

Project Implementation
Support for starting or improving your biosand filter project.                                                                                                                                                        
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Biosand Filter
Construction
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Latest additions

THE reference for slow sand filtration 1976)
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. (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)
Biosand filters operated with one, two, or three day residence periods did not have statistically significant differences in E. coli removal. (Young-Rojanschi, C.; Madramootoo, C. 2014)

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