Silica Sand Filter Activated Carbon Filter
Capacity : 1200 m3/day
Application: Surface water or River water treatment for Domestic use （TAP WATER )
Silica Sand Filter :
Sand filters are widely used in water purification and remove suspended matter by a completely different mechanism. Instead of the water passing through small orifices through which particles cannot pass, it runs through a bed of filter medium, typically 0.75 mm sand 750 mm deep. The orifices between such sand particles are relatively large, but dirt is adsorbed onto the large surface area presented by the medium. The pressure loss rises as the dirt builds up and the filter must be cleaned when it reaches about 3 m WC, otherwise the dirt can be pushed right through the filter.
Filter backwashing normally needs low-pressure compressed air and a flow of filtered water about ten times the rated filter throughput. These backwashing arrangements are critical, and providing the large flow of backwash water, as well as drainage for its disposal, can often create difficulties. Given good backwash arrangements, and on a water low in suspended matter, sand filters are simple, reliable, cheap and have low operating costs. Sand filters vary in sophistication. A simple filter will remove most particles down to 5 μm. Multi-media filters which use sand and anthracite, and possibly a third medium, in discrete layers, can yield very efficient filtration down to 2 μm.
Activated Carbon Filter:
Activated carbon filters are small pieces of carbon, typically in granular or powdered block form, that have been treated to be extremely porous. Adsorption is a distinct process where organic compounds in the air or water react chemically with the activated carbon, which causes them to stick to the filter. Activated carbon filters for remove bad smell and color and some in wastewater treatment, low down the BOD5 and COD. Carbon filters can effectively remove or reduce many contaminants from water including VOCs, chlorine, lead, fluoride, pesticides and much more
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