Difference between revisions of "Ceramic Silver Pot (CSP) filter"
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| − | [[Image:CSP filter.jpg|thumb|right|250px|CSP | + | [[Image:CSP filter.jpg|thumb|right|250px|Family using a CSP (Ceramic Silver impregnated Pot model) filter in Zapatera, Nicaragua. Photo: NWP.]] |
A new alternative to conventional ceramic candle filters is the CSP filter.This model has a pot-shaped ceramic filtering element that is treated with colloidal silver. It has a bigger capacity and is easier to produce locally than candle filters. Also leakages are easier to detect than in candle filters so there is less risk in use. | A new alternative to conventional ceramic candle filters is the CSP filter.This model has a pot-shaped ceramic filtering element that is treated with colloidal silver. It has a bigger capacity and is easier to produce locally than candle filters. Also leakages are easier to detect than in candle filters so there is less risk in use. | ||
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“A filter for family use that provides clean and bacteria-free water at a cost of US$ 3-5 per family per year” - Ron Rivera of the NGO Potters for Peace. | “A filter for family use that provides clean and bacteria-free water at a cost of US$ 3-5 per family per year” - Ron Rivera of the NGO Potters for Peace. | ||
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| + | ==Suitable conditions== | ||
| + | |||
| + | ==Construction, operations and maintenance== | ||
| + | Capacity: 10-20 litres/day. | ||
| + | |||
| + | ==Costs== | ||
| + | Cost complete filter: | ||
| + | (off-factory): US$ 8 in Cambodia, US$ 10-15 in Nicaragua.<br> | ||
| + | |||
| + | Cost of introduction: US$ 15,000 - 30,000 for project incl. training, machinery and a first production of 500 filters. | ||
| + | US$ 50,000 - 100,000 for project incl. production shop, training, first promotion, and 5,000 filters. | ||
| + | |||
| + | ==Field experiences== | ||
| + | |||
| + | 150,000 in Central America, Asia and Africa. | ||
| + | |||
| + | ==Acknowledgements== | ||
Revision as of 01:47, 15 May 2012
A new alternative to conventional ceramic candle filters is the CSP filter.This model has a pot-shaped ceramic filtering element that is treated with colloidal silver. It has a bigger capacity and is easier to produce locally than candle filters. Also leakages are easier to detect than in candle filters so there is less risk in use.
Evaluations, including a USAID-funded test in Nicaragua, indicate that CSP filters remove turbidity and harmful bacteria that cause diarrhoea, cholera and other waterborne diseases.Maintenance consists of cleaning with a brush and changing the ceramic element every 2-3 years. If filled twice a day the filter produces enough for a family of six.
Field studies have shown that investment in a filter is “paid back”within 3 to 6 months because of savings on expenses for medicines, fuel wood and labour. In Nicaragua, Guatemala and Cambodia the production of this filter is a commercial activity and production is starting up in six other countries.
“A filter for family use that provides clean and bacteria-free water at a cost of US$ 3-5 per family per year” - Ron Rivera of the NGO Potters for Peace.
Contents
Suitable conditions
Construction, operations and maintenance
Capacity: 10-20 litres/day.
Costs
Cost complete filter:
(off-factory): US$ 8 in Cambodia, US$ 10-15 in Nicaragua.
Cost of introduction: US$ 15,000 - 30,000 for project incl. training, machinery and a first production of 500 filters. US$ 50,000 - 100,000 for project incl. production shop, training, first promotion, and 5,000 filters.
Field experiences
150,000 in Central America, Asia and Africa.
