With all due submission we would like to draw your kind attention to the acute scarcity of pure drinking water in the rural villages and hilly areas of Bangladesh and other developing countries due to arsenic contamination in groundwater, flood and other disasters, pollution in rivers, ponds and hilly spring water.
Innumerable people, especially children,die of water borne diseases every year in developing countries.
Main victims of arsenic poisoning and water borne diseases are the poor villagers.
But rural people are not able to mitigate arsenic and purify water by general methods of water purification because these include
(a) proper scientific knowledge for dosing accurate quantities of different chemicals,
(b) costly instrumental use for monitoring mitigation process and other criteria for safe drinking water,
(c) cost and knowledge of treatment process, equipment, machineries and maintenance of the project,
(d) environmentally safe management process for arsenic wastes formed by coagulation methods and exhausted filters etc.
So attempt has been taken for innovation of low-cost indigenous technologies, such as cheap and simple gravity filters, regeneration process, and waste management and test kits.
Thesecan be easily operated by poor and illiterate rural people ofBangladesh and other developing countries.
In view of the circumstances, a new water filtering compound has been invented for absorbing arsenic and some toxic minerals of tube-wells water, following a research work beginning in 2000.
This filtering compound can be set up in low-cost traditional household filters and modern filter casings.
To make the filter composite long-lasting and cost-effective, a cheap and environmentally suitable regeneration system has been developed to free the filter from absorbed arsenic and toxic minerals.
After regeneration the filter works as new one and mitigate again about 500 liters of arsenic contaminated water by one kilogram of the invented filtering medium.
Test reports of Bangladesh University of Engineering and Technology (BUET)and Dhaka University indicate that the arsenic content was reduced 0.1735 milligram per litre (173.5 ppb) to 0.0013 milligram per litre (1.3 ppb) by the filtering medium, whereas the Government�s and the WHO�s permissible limits of arsenic in drinking water are 0.05 and 0.01 milligram per litre respectively.
It has been demonstrated that this filter composite also reduces some toxic minerals, iron and hardness of water.
We have also developed cheap arsenic test kits to detect arsenic independently by the users and school laboratories in rural areas.The filter composite also be useful for water treatment of flood, reserved ponds, rivers and hilly springs by using dirt-coagulant and antibacterial agent to get odourless, colourless and bacteria free potable water.
Bangladesh Government has given patent (Application No:98/2008) of the filter composite.
Considering the crisis of safe drinking water faced by the poor villagers, we wish to supply the filter composite at low price to the victims by NGO�s and other social development organizations.
The price of the filter and test kits can be lowered by financing this non-profitable project by the Governments of developing countries and Donor Agencies.
S.S. Supervision, Mohammadi Building (2nd floor),631/A, Commerce College Road,Chittagong, Bangladesh
E-mail : sssupervision at yahoo.com