The dry anaerobic digestion process uses anaerobic bacteria to produce biogas. The organic materials are sealed inside specially constructed anaerobic digestion tunnels fitted with airtight doors. Bacteria-rich percolate mixture that includes inoculants, liquids leached from organics during the anaerobic digestion process, and oils and fats recovered from commercial food operations, is sprayed onto the new material in the tunnels. This activates the biogas production process. Humidity and pressure is continuously monitored. Once the process, which takes 21 – 28 days, is complete, the raw biogas is transported to the adjacent Gasholder.