Water filtration is the process of removing undesirable chemicals, biological contaminants, suspended solids, and gases from water. The goal is to produce water fit for specific purposes.
Water filtration may reduce the concentration of particulate matter including suspended particles, parasites, bacteria, algae, viruses, and fungi as well as reduce the concentration of a range of dissolved and particulate matter.
Water filtration system is mostly a tertiary treatment process in waste water treatment, and as the main treatment in pretreated water from municipal water supply.
Water Filtration utilizes physical operation that separates solid impurities in the fresh water. A filter medium that has a complex structure through which only the fluid can pass. Solid particles that cannot pass through the filter medium are removes or separates as impurities and thus pure water is available for use.
Filtering media plays a vital role in water treatment process as based on the impurities type and quantity of the media varies. Different types of media used in filtration process are sand, gravel, anthracite, activated carbon, resins etc.
And in advance treatment process membrane based process are used for further removal of total dissolved solids. Reverse osmosis is the type of treatment process used in such kind of filtration system.