Article

Feasibility study of water purification using vertical porous concrete filter

International journal of Environmental Science and Technology (Impact Factor: 2.19). 09/2007; 4(4). DOI: 10.1007/BF03325987
Source: DOAJ

ABSTRACT

Cheapest and simplest techniques of filtration systems are required for rural water treatment in developing countries. Using a filter made of blocks for the water treatment enables us to make porous concrete filter and use it vertically. It is expected that the required area would decrease by more than 70 % if porous concrete filters were used vertically. The operation and backwash mode would be simpler than using horizontal sand filters as filters made of blocks would be used instead. The feasibility study focused on finding adequate materials, compositions and methods of making a block with enough resistance to water pressure, sufficient porosity for water transformation and using inexpensive and available materials. A pilot study was performed to determine an appropriate thickness of filter. Testing the porous filter in another pilot study using the low overflow rate of river water showed biological growth in that media and an adequate efficiency of about 90-100 % was obtained for decreasing the coliform bacteria. The required backwash water was 2.9 % of total treated water.

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    • "This concrete can be a successful means in addressing a number of environmental issues and supporting sustainable development. Despite of having a lower strength, the porous concrete with a higher porosity is useful for many applications, such as permeable pavement [2], purifying water [3] [4], heat reducer [5] [6], and sound absorber [7]. Porous concrete has been widely applied for rain stormwater and has been successfully used for filtering the water and reducing pollutant loads that enter into the streams, ponds, and rivers [8]. "
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    [Show abstract] [Hide abstract]
    ABSTRACT: There is a need to find cheaper and simpler techniques for rural water filtration system in developing countries. Using a filter made of blocks for the water treatment enables one to make vertical filters. It is expected that the amount of land utilized would decrease by more than 70 % if vertical filters were used. The operation and washing would be simpler than using horizontal sand filters as filters made of blocks would be used instead. The feasibility study focused on finding adequate materials, compositions and methods of making a block with enough resistance to water pressure, sufficient porosity for water transformation, and using inexpensive, readily available materials. A pilot study was used to determine an appropriate thickness. Testing the porous filter in another pilot study using the low overflow rate of river water showed biological growth in that media and an adequate efficiency of about 90-100 % was obtained for decreasing the coliform bacteria. Washing in this filter is possible. The amount of water necessary for backwashing is 2.9 % of total amount of water, which is passed.
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