Sand Filters

We are offering sand filters with automatic back wash options. the sand filtration removes the suspended solids from the effluent coming from the secondary clarifier. During filtering operations the retained solids cause an increase of head losses; when a pre-set value is achieved (usually 1.0 bar) backwashing with filtered water automatically takes place. Due to the weight of filtered solids, washing with water isn’t enough to clean the filter media properly, so the backwashing is normally performed with both water and air.