Multimedia Filters

Multimedia FiltersMultimedia Filters are designed to remove turbidity down to 10 microns in size. Multimedia filters are also referred to as depth filters, because turbidity is removed throughout the bed, not just on the surface of the top layer. They are sized based on the required service flow rate. Multimedia filters, as the name applies, have multiple layers of media in the vessel. Ecodyne Industrials multimedia filters have a three-layer bed plus a quartz gravel support bed. The filter bed is constructed of large, least-dense granules of Anthracite; medium-sized, more dense Sand; small size, most dense Garnet. The underbedding is washed and graded Quartz Gravel. Multimedia filters performance is based on the turbidity level, turbidity size and application. Flow rates of 5 gpm per square foot are normal when NTU levels are greater than 200. Flow rates up to 20 gpm per square foot can be realized when treating cooling tower water. Reverse Osmosis Pretreatment permits flow rates of 8 to 15 gpm per square foot. The backwash flow rate required is 12 to 15 gpm per square foot. Ecodyne Industrial offers a complete line of Multimedia filters starting at 12 (8 gpm) up to 72 (550 gpm). These filters are offered in a single multiport valve design or valve nest design.