Sonoma County, California 2009
The system is built from three identical IDB Tote HDPE tanks. To the rear one can just make out the biodigester itself. The top of the digester is connected by 1/2 inch clear plastic tubing to the top-side of the water displacement tank (WDT) . Water from this tank is forced by gas coming from the digester out of a length of clear 1/2" plastic tubing from the bottom of this tank that loops over the top of the WDT into the sump (20 gallon plastic garbage bucket in the foreground). The more gas is forced in the more water is forced out until the sump is about 3/4 full.