When discussing recirculating media filters one important aspect is the establishment and maintenance of the rate of recirculation through the filter. The desired ratio is set based on the level of treatment desired and is determined by the manufacturer or the designer, factoring in the estimated daily sewage flow from the residence. Over time it may be necessary to adjust the ratio based on actual sewage flows.Typical recirculation ratios range from 3:1 to 4:1. The volume that recirculates over the media filter divided by the volume of sewage generated by the residence minus one is the recirculation ratio.Here is a
Recirculation Ratios 101
If the level of treatment with recirculating media filters isn’t what it should be, it may be time to change the rate of recirculation
Jul 02, 2015
| by Jim Anderson, Ph.D. |
