Our 20th Biodigester Build

Our 20th Biodigester Build

January 16, 2010 A modified Solar CITIES digester using HDPE reactor with solar heat exchanger as reactor and 55 gallon drum telescoping gas collectors. Starter material is elephant dung and manure from 27 other species of animal from the Woodland Park Zoo in Seattle...
Building Biodigesters in Alaska

Building Biodigesters in Alaska

December 5, 2009 In late 2009, after developing our Solar CITIES IBC-based biogas system in Cairo, Egypt in anticipation for building in cold climates, we went to Alaska to experiment with psychrophilic microbial biodigesters in IBC tanks. Read more about the project...
SolarCITIES Cold Climate Digester

SolarCITIES Cold Climate Digester

May 5, 2009 This 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...