The clear supernatant which was transferred out of the clarifier chamber by transfer pump # 2 is pumped down to a perforated manifold at the base of the up-flow or recirculating filter chamber where the effluent rises slowly upward through the filter media. At the top of the filter the polished clear liquor then overflows by gravity through a Chlorinator to the last chamber where the effluent can be used for toilet flushing, lawn watering and other non-potable uses.
At the end of the filter cycle, the remaining fluid in the up-flow filter is returned to the front aeration chamber by the backwash pump # 4 which is located in a perforated well tile in the center of the filter chamber. The rapid return rate flushes back accumulated solids from the filter and as the liquid is removed, air re-enters around the filter media thus maintaining a healthy aerobic biomass to reduce the pollution load from incoming batches.
The Mini-Plant series (Sequencing Batch Reactor-SBR) treats wastewater flows from 500 to 5,000 gallons per day.
The Maxi-Plant series (Sequencing Batch Reactor-SBR) treats wastewater flows from 5000 to 100,000 gal per day.
