These aspects of a vinegaramended biosand filter offer benefits for decentralized water treatment in developing countries and could be leveraged for areas with nitrate contamination. Operation of biosand filters a laymans guide to clean water. Introduction a biosand filter purifies unsafe water dirty and contaminated and make it safe to drink. Source water is poured onto a diffuser plate at the top of the filter to prevent disturbing the top layer of sand. Bsf is a pointofuse water treatment system adapted from traditional slow sand filters. 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. These modifications make the biosand filter suitable for household or small group use. The biosand filter has been designed to allow for a filter loading rate flow rate per square metre of filter area which has proven to. Materials for construction filter construction filter assembly filter use filter maintenance additional resources biosand water filter by beth doerr and nate lehmkuhl published 2001 revised 2008 introduction access to clean drinking water remains one of the greatest challenges in the world. The biosand filter is comprised of a container plastic or concrete and is about the size of an office water cooler. It has an inset plastic pipe and is filled with layers of sand and gravel. The biosand filter presented to the who stakeholder forum on household water management january 30, 2007. Dirty water is poured into the top of the biosand filter, where a diffuser plate evenly distributes the water over the sand bed layer. In total, wood molds were made in these countries, producing over 250 biosand filters.
Bio sand water filter construction diy stepbystep youtube. The biosand filter is smaller making it suitable for use in peoples homes. Two purification methods involved simultaneously in the bsf are. The filter is a device biosand economical, effective and practical allowing drinking water supply in rural and indigenous communities, reaching almost 99% effe slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. A biosand filter bsf is an adaptation of the traditional slow sand filter, which has been used for community drinking water treatment for years. Vinegaramended anaerobic biosand filter for the removal of. What are the main differences between a biosand filter and a. All documents are free to download and available as pdf document only however you may need acrobat reader to view them. The filter container can be made of concrete or plastic.
It is used by over 5 million people in 55 developing countries to treat their drinking water. The construction and maintenance of the filter was simple, and biofilm cleaning did not negatively impact contaminant removal. The biosand filter can be produced locally anywhere in the world using materials that are readily available. Stack the biosand filter bucket on top of the two sand filter buckets. The biosand filter technology builds upon the centuries old slow sand filtration process.
Building a biosand filter for purifying water afropedea. Biosand filter components biosand filters are typically constructed from either concrete or plastic. Biosand technology is open source and royalty free, allowing us to build as many as our budget will allow. It also describes the steps to construct, install and monitor version 10 biosand filters. It is refilled manually and can supply the drinking water needs of a household. The centre for affordable water and sanitation technology cawst developed a great biosand filter construction guide that has lots of useful information. It is simple to clean the filter once the flow begins to slow. The biosand filter the biosand filter bsf is a householdscale, intermittentlyoperated slow sand filter invented in its current form by dr. Biosand filter construction manual without appendices section, august 2012. Vayalagam tankfed agriculture development programme.
Biosand filters remove pathogens and suspended solids from water using biological and physical processes that take place in a sand column covered with a biofilm. Gravel, followed by coarse sand and then fine graded quartz sand, are layered in the container as shown. Biosand filters and slow sand filters are both sand filters, meaning they use the same sand filtration methods to filter water see page 9 of the biosand filter construction manual for more information about how sand filtration works. This work is licensed under a creative commons attributionsharealike 3.
Strategies for implementing biosand water filter projects. Evaluation using biosand filter and waste stabilisation ponds. Improving household drinking water quality use of biosand. Organic material, living and dead, silt, clay, and particulates on filter bed. 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. Reduction of pathogens population between biolayer, 2. The content on this page has been adapted from publications of the centre for affordable water and sanitation technology cawst. Manz biosand filter the container is constructed from concrete formed in a mold. Make a small drainage hole at the bottom of the middle sand filter bucket. Dirty water is poured into the top of the biosand filter, where a diffuser plate evenly distributes the.
And, the best part is, you can continue to use the same sand over and over again. In this manual, the biosand filter is drawn in many ways. A biosand filter is a simple type of water purification system that uses sand, gravel, gravity and some simple engineering to. Cawst is a canadian nonprofit organization focused on the principle that. He also cofounded cawst in 2001 to provide the professional services needed for the humanitarian distribution of. Filter construction guidelines pdf this work is licensed under a creative commons attributionsharealike 3. Biosand filter manual 5 jul 07 the biosand filter continued the biosand filter is a simple concrete box with six different distinct regions. Ppt biosand filtration bsf powerpoint presentation free. The materials to construct the biosand filter are all available locally and are very affordable.
Bushproof provides trainings to make biosand filters, which are a slow sand filtration product for household use. 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. It is about the size of an office water cooler, constructed of medicalgrade plastic, and filled with multiple grades of specifically selected and prepared sands and gravels. A biosand filter treats 8 liters or more of water per hour. 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. Some of the molds were made using zero electricity and only hand tools. Comparative analysis of the fltron and biosand water. Bio sand 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. Via siphoning principles, the top level of water will remain at exactly the highest point of your. An estimated 320,000 bsfs have been installed throughout the world in more than 70 counties17. The trick to turn an ordinary sand filter into a biosand filter is pretty simple in a cleverly elegant way you simply run a thin tube from the outflow on bottom back up to the top before it loops back down to your cleanwatercollecting bottle. The biosand filter should be used as part of a multibarrier approach which is the best. The biosand filter construction manual describes what a biosand filter is and how it works. It gives filter and mould instructions for those who want to make their own.
If it is sitting on the ground, it will come up to your waist, or higher. Strategies for implementing biosand water filter projects case studies from the philippines submitted by ian maycumber in partial fulfillment of the requirements for the degree of master of science in civil engineering colorado state university fort collins, colorado 2009. There is a recommended filter loading rate for each filter design. How to build a high quality water filter using sand build a. Biosand filter construction each filter is constructed of a concrete body 3 tall and a foot square filled with layers of gravel and sand see schematic above. Building a biosand filter for purifying water is simple. 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. Biosand filtration is an appropriate and lowcost method for household water treatment and is proven to reduce the incidence of diarrhoea. Oxygen in the air diffuses through the supernatant to. Equally, for those that require it, moulds can be bought by bushproof, the madagascarbased company that owns biosandfilter. Evaluation using biosand filter and waste stabilisation ponds on free shipping on qualified orders parasitology of wastewater. Every part regarding the construction of a biosand filter, can be found locally in any country.
The most widely used plans for the concrete biosand filter are produced and distributed by cawst in calgary. Cawst is a canadian nonprofit organization focused on the principle that clean water changes lives. The first way is to use pvc elbows, but the filter cost then increases, while the second way is to just bend the pipe using heat. Biosand filter components, construction, and dimensions. Apr 12, 2017 the hydraid biosand filter is based on the concrete filter process but uses a plastic container, making the container itself much lighter and easier to transport. The biosand filter is one method that can be used for. The water simply flows through the filter and is collected in another storage container at the base of the spout.
Sep 10, 2012 bio sand water filter construction diy stepbystep. 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. This is the biosand filter construction manual without the four appendices. Biosand filter for technicians participant manual iv drawings of the biosand filter the biosand filter is a large box. Mar 19, 20 the trick to turn an ordinary sand filter into a biosand filter is pretty simple in a cleverly elegant way you simply run a thin tube from the outflow on bottom back up to the top before it loops back down to your cleanwatercollecting bottle. A bucket of contaminated water can be poured into the top of the biosand filter. David manz developed the household biosand filter in the 1990s at the university of calgary, canada. Dr manz has trained many organizations on the design, construction, installation, operation and maintenance of the biosand filter. Pdf biosand filter construction guide affordable point of.
Oxygen in the air diffuses through the supernatant to the biological layer. How to construct, install and use biosand filter for pure. When the water is flowing through the filter, oxygen is supplied to the biological layer at the top of the sand by the dissolved oxygen in the water. Alternatively, hydraid biosand water filter is a privately owned company that holds a license for a plastic biosand filter design. The thicker the layer, the more effective the filter. Biosand filtration bsf 1 biosand filtration bsf fluidivas lindsey ehinger, laura mar, stephanie wedekind, kim wilson. Ocheme julius okojokwu, helen ileigo inabo, sabo ezemuel yakubu. There is a recommended filter loading rate for each biosand filter design. This ebook will teach you every aspect of this biosand filter.
445 1237 375 1274 159 1399 889 6 1536 1459 739 1322 1526 203 1056 764 1226 1098 194 324 1147 1010 163 587 1052 978 1270 1312 1395 1475 173 1482