Abstract
Unsanitary water is a leading cause of death in low and middle- income countries like Pakistan. For microbial purification of water seven different low cost filters were constructed within 50 ml plastic syringes’ cylinders. Filters I, II and III were prepared by mixing different amount of commercially available plaster of Paris and water, while in case
of filters IV, V, VI and VII in addition to the plaster of Paris, marble powder and sand were incorporated in different amount in water to make filters. Diluted sewage waters were passed through these filters and the filtrate were then processed for viable counting of bacteria on nutrient agar, eosine methylene blue, (EMB) agar and mannitol salt agar
media. Filtrates of filters I, VI and VII gave no growth at all on EMB agar, indicating their coliform retention tendency.Filter V reduced bacterial growth over 104 - 9.9 103 % C.F.U./ml on the nutrient agar and mannitol salt agar media. Keeping in view overall efficiency this filter gave excellent results. These results are suggestive for more work
employing different combination of naturally found low cost materials to construct filters of different column length and porosity for convenient microbiological purification of drinking water.
Naheeda Akram and Arjumand Shah Bano*, Javed Iqbal Qazi. (2015) Construction of low cost filters for microbiological purification of drinking water, Punjab University Journal of Zoology, Volume 30, Issue 1.
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