Diagram of fixed dome type biogas plant:
Explanation of layout of biogas plant by the method of fermentation conversion
1. Foundation : Biomass plant consists of pit excavated to desire size & depth, The foundation is nothing but the base of digester. It is made with the help of cement, concrete. 2. Digester: It is container made up of bricks, sand & cement. Digestor tank is undergrounded to increase the efficiency. In the digester, decomposition of biomass takes place due to anaerobic bacteria to produce biogas. Quantity of gas produced is depend open type of waste & temperature. 3. Dome (Balancing Tank) : It is the roof of digestor in which biogas is collected. 4. Mixing Tank: It is the tank placed on the top of inlet chamber in which animal, sanitary waste & water are mixed properly to make slurry. 5. Inlet Chamber: It is to admit slurry into digesteor chamber through pipe due to gravity. 6. Outlet Chambers: When generated biogas is high then it increases pressure downwards to slurry. Due to pressure of gas, slurry comes upward automatically through pipe which is collected in outlet chamber. The residue (slum) left is used as fertilizer (valuable) 7. Gas Outlet pipe: It is an outlet pipe fitted at the top of the dome of the digestor to take the biogas for utilization. The valve is provided to control the flow of biogas. 8. Mixing or Stirring: The decomposition process can be speed up by stirring the slurry from the top of the dome with the help of stirrer which is at digester chamber.