After clarification, water is filtered as a further treatment step to remove any remaining suspended particles and unsettled floc. A large variety of drum, disk, gravity and pressurized filters exist for this purpose, each having their own specific process benefits. These are used in the removal of suspended solids (turbidity), organic and micro-pollutants, heavy metals and other particles not removed by clarification.
While the most common type of filter is a rapid gravity sand filter, a variety of pressure filters can also be used. Media that can be used in filters vary from traditional sand and activated carbon, to multiple layers of various media.
Filtration may be used in the treatment of industrial effluent, process water, municipal wastewater and drinking water. It is also used as a pre-treatment step to membrane processes and desalination of seawater.
|Usage/Application||Industrial Effluent, Process Water, Municipal Wastewater, Drinking Water and Seawater Filtration|
|Capacity||20 KLD to 100 MLD|