Sand filter is one of the oldest and most common methods of water purification that is used to remove suspended particles in water with a size of more than 100 microns. Cheap price, efficiency and long life are among the positive features that have made sand filter water treatment widely used in domestic and industrial applications. Sand filters have various applications in process and chemical industries in addition to chemical water treatment. They have drinking water treatment, public health systems and pool water treatment.
Application of sand filter:
- Pool water purifier
- Reverse osmosis pretreatment
- Wastewater treatment
- Drinking water purifier
- Agricultural water treatment
- Cool tower sand filter
Advantages of sand filter:
- Easy installation, maintenance and repair
- Cheap price of sand filter
- Very high diversity in terms of sand filter capacity and water passage speed
- High water purification power with removal of particles larger than 100 microns
- Easy backwashing
Materials used:
- stainless steel
- Carbon steel with paint coating
How does a sand filter work?
As mentioned, sand filters are an atmospheric tank that is mainly designed and produced in square or cylindrical forms. Such equipment is in fact a bed of pure sand (anthracite sand or charcoal (activated carbon)) through which water with suspended and turbid particles is passed and by trapping these particles (any bacteria, mud, paint, Decomposed elements obtained from corrosion and 2) are obtained in sandy, clear blue water and suitable.
Therefore, the sand filter can be considered as a type of water purifier, which is used to eliminate suspended particles in water based on the filtration process resulting from the presence of pores in the sand filter bed of the device. It is also not bad to know that due to the accumulation of water suspended matter in the pores installed in the filter, a kind of pressure drop occurs, and if this pressure drop is more than a certain amount, the filter device must be Sand to be washed.
