ZamZam’s pressure filters clarify water by removing turbidity, unpleasant tastes, and odors, sediment, iron, suspended particles, and unwanted color, all of which are commonly found in surface water.
Filter Media Types
- Sand is the most common filter media. Generally, fine mesh sand is coupled with a course grain support bed.
- Anthracite is used in applications where silica pick-up from sand media is undesirable.
- Gravel has a highly spherical shape that promotes good flow and even distribution in support beds.
- Filter AG is non-hydrous silicon dioxide with many advantages for the reduction of suspended matter.
- Activated Carbon is recommended for removing bad tastes, odors, dechlorination, and organic contaminants.
- Manganese Green Sand is used to reduce iron, manganese, and hydrogen sulfide through oxidation.
- Multimedia is used for maximum water quality when sediment is too small to be removed by standard media.
Multimedia Filtration Operating Cycles
Water flows downward through the media, while solids accumulate in the media bed. The purified water passes through to downstream processes.
When the filter begins to clog or when the head loss (pressure drop) through the bed increases, flow rates are reduced. To prevent degradation of water quality, the flow is reversed. This is directed by the control valve(s) to drain, carrying with it, the particulate matter that has built up during service. The required flow is specific to the media and is essential to proper cleaning of the media bed.