Sand acts as a coarse natural filter and provides a level of purification that removes mud, silt and larger debris. Sand filters are one of the most popular ways to filter water for good reasons they are simple, effective and require very little attention. Water is routed through a sand-filled pressure vessel, over time dirt accumulates in the spaces between the sand particles causing the pressure in the vessel to rise as water finds it harder to pass through.
Iron Removal Systems
One of the most common contaminants of well and even municipal water systems is iron. Iron contamination can be found in two general forms, ferric iron which consists of particles of solid iron (rust) that can be removed by mechanical water filter (sediment filters) and ferrous or dissolved iron which must be removed from water by special iron water filters.
Birm Filter is an efficient and economical media for the reduction of dissolved iron and manganese compounds from raw water supplies. It may be used in either gravity fed or pressurized water treatment systems. Birm acts as an insoluble catalyst to enhance the reaction between dissolved oxygen and the iron compounds.