Biosand filter construction guidelines page 3 of 11 casting procedure step 1 preparing the pvc pipe, greasing and assembling the mould there are two ways to make the pvc pipe that is cast inside the concrete. Bsf performance is comparable to other recommended household water treatment interventions. David manz developed the household biosand filter in the 1990s at the university of calgary, canada. Ppt biosand filtration bsf powerpoint presentation. The biosand water filter bsf is a technology being implemented in 70 countries worldwide to address water quality concerns. Oxygen in the air diffuses through the supernatant to. Biosand technology is open source and royalty free, allowing us to build as many as our budget will allow.
How to build a high quality water filter using sand. When installed and used properly, the bsf has been proven effective in numerous studies to remove 90 to 99% of waterborne pathogens cawst1 2006. A pilot test project in san juan del sur, nicaragua was conducted to verify viability. There is a recommended filter loading rate for each filter design. The centre for affordable water and sanitation technology cawst developed a great biosand filter construction guide that has lots of useful information. These filters are built locally using available materials and labor. The biosand filter was developed incalgary univertity canada in 90s andhad supplied clean water to millons of people 10. Like other filters, the biosand filter cannot remove dissolved contaminants or chemicals, such as salt, arsenic or fluoride. Its structure is generally made of concrete or plastic and. A biosand filter bsf is an adaptation of the traditional slow sand filter, which has been used for community drinking water treatment for 200 years. It also describes the steps to construct, install and monitor version 10 biosand filters. Bio sand water filter construction diy stepbystep youtube. A bsf consists of a concrete or plastic container filled with specially selected and prepared sand and gravel. Biosand filter construction manual without appendices section, august 2012.
Design of an appropriate household drinking water filter for rural nepal final report july 2003 prepared for rural water supply and sanitation support programme butwal, nepal and environment and public health organization. In this manual, the biosand filter is drawn in many ways. The biosand filter construction manual describes what a biosand filter is and how it works. Knowledge about filter construction, user education and project management are crucial to. Biosand filter performance after periodic abandonment in honduran schools cordelia stewart1, barbara stewart2, catherine hopper3, ellen tobin2, kirsty moriarty4, julia fasse5, carolyn meub6 1bowdoin college, 2bangor high school, 3university of maine, 4water for me, 5tufts university, 6pure water for the world. Source water is poured onto a diffuser plate at the top of the filter to prevent disturbing the.
Book 5 sieve set construction june 2007 pdf download. The most widely used plans for the concrete biosand filter are produced and distributed by cawst in calgary. The foundation that has done the work to develop and promote the biosand filter has extensive plans on construction and studies on efficacy of the filter pdf. Pdf biosand filter construction guide affordable point of use. Biosand filters have been designed to allow for a filter loading rate flow rate per square meter of sand surface area which is specific for each biosand filter design and has proven to be effective in laboratory and field tests. This is the biosand filter construction manual without the four appendices. The materials to construct the biosand filter are all available locally and are very affordable. Currently, their project consists of two main areas in rural communities around the towns of kisii and eldoret. How the biosand water filter works samaritans purse. The concrete biosand filter is an innovative version of the slow sand filter specifically designed for household use. A free powerpoint ppt presentation displayed as a flash slide show on id. Biosand filter construction guide affordable point of use drinking water treatment method. Practice%20generic%20themetriplewinsforsustainabledevelopmentweb. Operation of biosand filters a laymans guide to clean water.
Biosand filter construction guidelines page 3 of 11 casting procedure step 1 preparing the pvc pipe, greasing and assembling the mould there are two ways to make the pvc pipe that is. This work is licensed under a creative commons attributionsharealike 3. This awardwinning water filtration technology was developed by dr. Uptodate description and history of the biosand water filter. Biosand filter effectiveness is greatly influenced by the presence and quality of filter components, the quality of filter construction, and the dimensions of the filter. He also cofounded cawst in 2001 to provide the professional services needed for the humanitarian distribution of. Biosand filter for technicians participant manual iv drawings of the biosand filter the biosand filter is a large box. Slow sand filtration cdc pdf pdf 2 pages a slow sand filter is a sand filter adapted for household use. This document will help you understand the basics of a biosand filter bsf. Overview of the biosand filter what is the biosand filter.
A sustainable option for household treatment of drinking water 299 particulate material in the top surface of the filtering media will reduce the flow rate through the filter. If it is sitting on the ground, it will come up to your waist, or higher. Improving household drinking water quality use of biosand filters in cambodia the bsf is a robust water treatment technology for use in rural cambodian households, capable of effective removal of bacteria, and significant reduction of diarrheal disease. Building a biosand filter for purifying water is simple.
Cawst has prepared a summary of laboratory and field studies for the biosand filter. Biosand filter performance after periodic abandonment in. The manual illustrates the design, construction, installation, operation and maintenance of the biosand filter. Pdf biosand filter construction guide affordable point. John 2102012 this manual details the design principles and communicates the assembly and installation procedures for a 10 inch pvc pipe biosand filter.
The biosand water filter is an adaptation of slowsand filtration that is designed for use by families at the household level. There is a great deal of history and many projects that lead to the development of the biosand water filter technology and spinoff technologies presently marketed by. Book 6 selection and preparation of filter media may 2008 pdf download. As with the other types of water projects we support, we are meeting the clean drinking water.
Biosand filter manual 5 jul 07 the biosand filter continued the biosand filter is a simple concrete box with six different distinct regions. Household biosand water filters michigan technological. Building a biosand filter for purifying water afropedea. Each filter is constructed of a concrete body 3 tall and a foot square filled with layers of gravel and sand see schematic above. The content on this page has been adapted from publications of the centre for affordable water and. All documents are free to download and available as pdf document only however you may need acrobat reader to view them. The biosand filter is a modified form of the traditional slow sand filter in such a way that the filters can be built on a smaller scale and can be operated intermittently. Via siphoning principles, the top level of water will remain at exactly the highest point of your siphon tube. As in slow sand filters, a biological layer of microorganisms also known as.
Strategies for implementing biosand water filter projects. Biosand filter components biosand filters are typically constructed from either concrete or plastic. Many types of biosand filters are out there, but the standard one that is currently in use all of africa and other parts of the world is made out of concrete. The construction of institutional latrines and distribution of digging kits water, sanitation and. What are biosand and ceramic water filters, how do they benefit. A biosand filter is a simple type of water purification system that uses sand, gravel, gravity and some simple engineering to purify water contaminated with biologics and some chemicals. The biosand filter bsf is a simple household water treatment device, which is an innovation on traditional slow sand filters specifically designed for intermittent use. The filter design is inspired by the opensource biosand filtration technology but uses a lightweight plastic housing instead of concrete. Alternatively, hydraid biosand water filter is a privately owned company that holds a license for a plastic biosand filter design. Longterm field performance of biosand filters in the. The biological layer formed in the top few centimeters of the sand in slow sand filters and biosand filters.
Dr manz has trained many organizations on the design, construction, installation, operation and maintenance of the biosand filter. The filtration sand removes pathogens, suspended particles and other contaminants. A field study assessing the sustainability and efficacy of 55 biosand filters installed during 19992010 was conducted in the artibonite valley, haiti during 2011. Their design is a bit over the top for our use though, using concrete and sheet metal to construct the thing. Manzwaterinfo biosand water filter, biosand water filter. Aci developed a biosand filter using a plastic container for the filter body in 2007 and have received training and followup support from cawst.
There is an adaptation of the biosand filter using rusty nails, called the kanchan filter, which can remove arsenic from water. You can also download our wood mold construction manual and appendix. These modifications make the biosand filter suitable for household or small group use. For more information on the technical aspects of the biosand filter visit biosand filter construction.