Biogas is a type of renewable energy that belongs to the category of biofuels that are produced naturally by the decomposition of organic waste in the absence of oxygen, called anaerobic digestion. Anaerobic digestion is a natural form of waste-to-energy that uses the fermentation process to break down organic matter. Biogas generated by anaerobic digestion processes is a clean and environmentally friendly renewable fuel. Various advantageous options for using biogas are currently available thanks to the advancement of technologies. The most common uses of biogas are electricity production, heat generation and, with new technologies, it can be converted into renewable natural gas and compressed renewable natural gas, as well as used as a vehicle fuel. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an original essay The most common use of biogas is for thermal energy. A small biogas plant can provide thermal energy for simple household tasks simply by adjusting the air/gas ratio in a conventional gas burner. According to the manual “Sustainable Heat Use of Biogas Plants” by Dominik Rutz, biogas can be used as a fuel for a combined heat and power (CHP) plant, which is a simultaneous production of electricity with waste and use heat. Basically it is a gas-powered engine to which a generator is connected. The engine drives the generator, which in turn produces electricity. Due to internal combustion, the gas engine also generates heat. This heat leaves the engine through exhaust gases and coolant. By using heat exchangers, this thermal energy can be captured and used productively. An engine-based cogeneration unit has an efficiency of up to 90% and produces approximately 35% electricity and 65% heat. Compared to natural gas, biogas is generally of lower quality. Its calorific value is lower. Furthermore, biogas may also contain contaminants harmful to the engine, such as sulfur compounds, halide compounds, acids and solids, thus often leading to the treatment of biogas to reduce the level of contamination and improve the performance and life of the gas engine . . This renewable energy is already used for heat and electricity production, but the best way to scale up this clean energy is to use it as vehicle fuel. Gasoline vehicles can use biogas as fuel, but the biogas must be upgraded to natural gas quality in order to be used in regular vehicles designed to use natural gas. Gas purification is normally performed in two stages where the main stage is the process that removes the CO2. Minor contaminants are normally removed before CO2 removal and the water dew point can be adjusted before or after upgrading (depending on the process). The second step is H2S removal where the ferrous material (material made of iron) is placed in a closed gas-tight container to be purified. Suryavanshi ND Shaha, a professor at SVPM's mechanical engineering faculty, said biogas has a very high octane number, around 130. In comparison, gasoline is 90 to 94 and alcohol 105 at best. This means that a higher compression ratio can be used with biogas than with petrol. An engine's compression ratio is the ratio of the volume of gas in the cylinder when the piston is at the top of its stroke (top dead center or TDC) to the volume of gas when the piston is at.