EQUIPMENT FOR WATER TREATMENT PLANT

Sand filters

Purpose
Sand Filter is used for filtration of water in order to obtain drinking water or for the purpose of tertiary treatment of waste water.

Types

  • Open gravity filters
  • Pressure filters
  • Automatic self cleaning filters

Materials
Often used is steel with epoxy paint protection and stainless steel.

Design Criteria
Filter material, quantity, granulation, a type of nozzles, and a lot more have to be defined on the basis of process requirements.
Open gravity filters are made for limited capacity, while for larger capacity filter stations are implemented.
Automatic self cleaning filters have particular use in the smaller filter station, then in treatment of water for industrial process, or tertiary treatment of waste water.

Schematic diagram of the automatic self cleaning filter

Filtering Phase

Cleaning (washing) Phase