TURBIDITY AND BACTERIAL REMOVAL IN HORIZONTAL FLOW FILTER

Abstract

The conventional filters requtre 30 inches of sand bad to remove the i*purtiec, tb ugh only the top fey inches of tiie sand bed Is only clogged and most of the sand below the top few inches remains practically unclogged. Consequently a loss of bead of upto 6 to 8 feat is xeched after 24 hours. A cleaning of the entire filter bed therefore becomes essential; requiring considerable amount of water at considerable head for ba kwashl,ng. Thy► the process is costly and IS Unable to provide safe water within the reacb of smell communjties. The ,prawn work indicates that along with economy in construction id simplicity of operation and mainte.. nance, , the honzontl filters can be run for more length of time at mueb lesser loss of be* d. The mite at* +impact and self contained, thereby can fulfill the needs of Small coumunitiee.