The BSF12 is able to filter 12 litres per hour. The filter is approximately 80 cm tall and 35 cm wide at the lid. (Shorter filters – 45 cm in height – are in the design phase.) The design may be configured to be manually or automatically operated. Water is filtered on an ‘as required’ basis though daily use is recommended. The manually operated versions were specifically designed for developing country environments (urban and rural) and remote applications typical of Canada (cottages, camps, remote communities, temporary habitation and recreational vehicle). The automated version of the BSF12 was designed for use where electricity is normally available and convenience of use is a priority; and, it is significantly more expensive than the manually operated versions.
The manually operated BSF12 may use a variety of differently designed standpipes. Valves are not used in the least expensive design. The filtering media (selected and prepared sand) should never need replacement if the filters are used for production of drinking water using sources of water that would normally be considered for potable water use. Operation consists of pouring untreated water into the top of the filter. It passes through several layers of media and leaves through the standpipe outlet. Filtered water is captured in a container suitable for storing and dispensing potable water. Rate of flow of filtered water is controlled internally and cannot be adjusted. Typically, the volume of untreated water added to the filter does not exceed the capacity of the treated water storage vessel. The filtered water may be disinfected using chlorine (liquid or tablet form). The manually operated BSF12 may be cleaned using harrowing or backwash methods. No electrical power is required.
The automatically operated BSF12 would employ a float controlled inlet system that would allow filtration as required to fill the treated water storage reservoir. Untreated water may be supplied by a pump or from overhead tanks (gravity). UV disinfection may be used before the treated water storage. Chlorine in liquid or tablet form could be used to disinfect the water in the treated water storage reservoir. Water from the treated water storage could be manually dispensed or distributed to suitably located faucets using an electric demand pump. The automated BSF12 may be cleaned using harrowing and backwash methods. A drain to remove wastewater can be used. A household reverse osmosis system may be added if desired.
The BSF60 would provide up to 60 litres of filtered water. It is intended to be used in automated systems that include an appropriately sized storage reservoir to contain filtered and disinfected water and distribution of treated water using electric pumps.
The larger MFS polyethylene filters would always be automated similar to the BSF60. Typically, larger treatment systems would employ two or more filters.
All materials used in the construction of the MFS polyethylene filters meet NFS 61 standards.
Filters operating as slow sand filters meet AWWA Guidelines, EU Standards and can be configured to meet the United States Ten States Standards.
MFS treatment capability are described in the MEL Filter Systems brochure. Performance claims related to removal of water borne pathogens have been independently confirmed.
Specifications and pricing available on request.
Engineering services are available.
At this time MFS polyethylene filters (with or without media) are available from Canada to international markets by ISO container only. Media used must meet MEL specifications.