Performance of using crushed glass and sand as a filtration media in purification drinking water

Abstract

This research includes performance of using crushed glass as a filtration mediawith sand depending on the variation in turbidity levels in the raw water (5, 10, 25, 50, 75, 100 and 200) turbidity unit, type of the filter , type of filtration and the depth of the filter (25, 35 and 55 cm.) within filtration rate (8) m/hr. A total of (9) different configuration filters with different types and different depths of the filtration media, (6) of them are single-media and (3) are dual media which ranged between (25 and 55) cm and the number of the samples was (196) of the water resulting from the filters. The results showed that the glass media has the capability to remove turbidity and provide quality effluents conform to international and Iraqi specifications (less than 5 NTU).Effluent turbidity well below (1 NTU) is also achieved. In addition to that, the best results were obtained of removing turbidity when using the crushed glass as a filtration media in the dual filters as upper layer and with a removal percentage that reached (98.4%). For the single filters, the study showed the superiority of the glass filter over the sand filter in terms of turbidity removal at the preliminary levels in raw water in which turbidity is less than (25 NTU). While the sand filter was superior over the glass one in turbidity levels which exceed (25 NTU). Keyword: filtration media, crushed glass, filtration rate, direct filtration, single& dual filters