Turbidity Removal of Landscape Water by Filtration Bed with Suspended Media

Abstract High turbidity seriously affects the landscape effect of urban landscape water. In order to explore the turbidity removal effect of filtration bed with suspended media materials on landscape water, a filtration test was carried out with Xinhe river in Fengxi new city. The results showed that the filter bed had an effective and reliable removal performance on turbidity and suspended solids in landscape water. The turbidity removal rates were 44.50%-77.24%, and the suspended solid removal rates were 50.37%-78.85%. The use of expended polystyrene filter media material and upward flow direction got higher remove effect of the turbidity. Suspended solid particles with size less than 100 μm is the limiting factor affecting the treatment effect of the filter bed, and the expanded polystyrene filter material had a better removal effect on the particulate matter in this range. On the premise of ensuring the treatment effect, the filter bed with suspended media has the advantages of low backwash energy consumption and long filtration period, therefore, it is suitable to be used as the pre-treatment unit of landscape water treatment project.