Effect of Filter Thickness on Efficiency of Sand Filter Water Quality Structure

Abstract The primary objective of this study is to determine the relationship between the thickness of a sand filter and its effectiveness in removing fine particles suspended in water. To accomplish this objective, a physical model of a sand filter was built and designed to represent an underground confined water quality sand filter structure. Three types of sands, namely fine, medium and coarse, were used. The results indicated that the sediment removal efficiency for all sand thicknesses decreased with time. Within the range of variables studied, a thicker sand bed resulted in a more effective sand filter water quality structure.