A sand-anthracite filter or parallel press filter/multi-media filter is mainly used for the treatment of turbidity and revoked colours as low as 10-20 microns. Dual media filter provide very effective compound treatment under the circumstances of...
Sand filters are used for water purification. There are three main types: - rapid (gravity) sand filters - upflow sand filters - slow sand filters All three methods are used substantially in the water industry throughout the world. The first two...