īiogas can be compressed after removal of Carbon dioxide, the same way as natural gas is compressed to CNG, and used to power motor vehicles. It can also be used in a gas engine to convert the energy in the gas into electricity and heat. This energy release allows biogas to be used as a fuel it can be used in fuel cells and for any heating purpose, such as cooking. The gases methane, hydrogen, and carbon monoxide ( CO) can be combusted or oxidized with oxygen. Ģ) and may have small amounts of hydrogen sulfide ( HĢS), moisture and siloxanes. īiogas is produced by anaerobic digestion with anaerobic organisms or methanogen inside an anaerobic digester, biodigester or a bioreactor. The bigger commercial models provide a water seal between the digestion tank and gas holder tank.Biogas is a mixture of gases, primarily consisting of methane and carbon dioxide, produced from raw materials such as agricultural waste, manure, municipal waste, plant material, sewage, green waste or food waste. An one thousand litre capacity Digestion tank will be sufficient for a small household for daily cooking purpose. This is a basic prototype of a Bio-gas system using the food waste, decomposable organic material and kitchen waste to produce gas. Total cost of this proto-type system is about one thousand Indian Rupees (about 20 dollars) Subsequent gas will consist of about 70 to 80 percent methane and the rest carbon di oxide, which can be used in a single bio-gas burning stove or a Bunsen burner. These gases can be released to the atmosphere by opening the ball valve at least three / four times. Initial production of gas will consist of oxygen, methane, carbon di oxide and some other gases and will not burn. When we feed the system, the excess digested slurry will fall out through the outlet pipe, which can be collected, diluted and used as organic manure. We can add some weight on top of the gas holder to increase the gas pressure. The gas holder will rise along the guide pipes based on the amount of gas produced. Subsequently, food waste, decomposable organic material and kitchen waste will be diluted with water and used to feed the system. Initially, cow-dung mixed with water will be fed in to the system, which will start the gas formation process. Wait for a day or two before feeding the system, allowing all joints to get cured and become leak-proof. I have removed the gas pipe, so that the joints will get cured without any stress: Additional accessories A single burner bio-gas stove or a Bunsen Burner used in school laboratoriesĬompleted unit. A hack saw blade for cutting the cans & pipes and a sharp knife for cutting holes on the cans are all the tools we need. Gas outlet system: Please see Step 4 below for required materials and construction Tools required Do not require many tools here. 32 mm dia pvc pipe: about 25 cm long (fixed on digester tank to act as outlet for digested slurry) 7. 25 mm dia pvc pipe: about 75 cm long (fixed inside the digester tank as a guide pipe) 6.
32 mm dia pvc pipe: about 50 cm long (fixed inside gas holder tank as a guide pipe) 5. 64 mm dia pvc pipe: about 40 cm long (to be used for feeding waste material) 4. (to be used as Gas Holder Tank) (Make sure the smaller can fits inside larger one and moves freely) 3. This project is also useful for students to have a hands-on learning experience in constructing a Mini Bio-Gas Plant, using locally available material. Components of the Bio-gas Plant The major components of the bio-gas plant are a digester tank, an inlet for feeding the kitchen waste, gas holder tank, an outlet for the digested slurry and the gas delivery system for taking out and utilizing the produced gas.
Also, the waste materials can be disposed off efficiently without any odor or flies and the digested slurry from the bio-gas unit can be used as an organic manure in the garden. The bio-gas produced from food waste, decomposable organic material and kitchen waste, consisting of methane and a little amount of carbon di oxide is an alternative fuel for cooking gas (LPG). I have been searching for some method of using the food waste, decomposable organic material and kitchen waste efficiently, and came across information on producing bio-gas from organic waste.