The DynaSand® EcoWash® Filter expands upon the DynaSand platform by allowing continuous filtration with intermittent sand washing. Operating in this mode, the system reduces the amount of reject water, increases filter performance, maximizes the airlift life cycle, and reduces maintenance time.
This is accomplished by the addition of a sand movement detection system that is tied to an alarm and monitored in the control room. Through modifications to the airlift design and operation, consistent sand movement is assured. When the system is not backwashing, the reject line is automatically closed, dramatically reducing reject water.
Backwash is controlled through either a differential pressure-controlled mode or timer timer-controlled mode. The frequency and length of time for the backwashing operation can be adjusted based on an individual plant’s influent conditions.
The EcoWash® incorporates Parkson patent-pending technology – US Patent Numbers 8,658,031; 8,771,521, 8,696,896.