Biogas and its production process?
Composition of biogas?Biogas is a mixture of gas, its main component is methane, followed by carbon dioxide, hydrogen sulfide (H2S), nitrogen and other components. The biogas composition, combustible components including methane, hydrogen sulfide, carbon monoxide and heavy hydrocarbon gases; non combustible components including two carbon monoxide, nitrogen and ammonia gas in the methane. In the composition of methane content is 55% ~ 70%, the carbon dioxide content is 28% ~ 44%, the average content of hydrogen sulfide was 0.034%
Biogas and its production process?Methane is the organic matter in the anaerobic environment, temperature, humidity, pH conditions, through microbial fermentation, a kind of combustible gas produced. Because the gas was first found in swamps, lakes, ponds, so people call it biogas. Biogas containing a variety of gas, mainly methane (CH4). The methane bacteria decomposition of organic matter, have called methane fermentation biogas. According to the effects of various kinds of bacteria in the process of biogas fermentation, methane bacteria can be divided into two categories. The first type of bacteria called decomposing bacteria, it is the role of the complex organic compounds are decomposed into simple organic compounds and carbon dioxide (CO2) etc. among them. A special decomposition of cellulose, called cellulolytic bacteria; a special decomposition of protein, called protein decomposing bacteria; a special decomposition of fat, called fat decomposing bacteria; second kinds of bacteria called containing methane bacteria, Usually called methanogens, it is the function of the organic matter and carbon dioxide oxidation or reduction of methane. Therefore, organic materials into biogas process, two processes like factory production of a product: the first is the decomposition of organic bacterial manure and straw, weeds and other processing complex into semi-finished products: the compound has the advantages of simple structure; then the methane bacteria under the action of the compound processing into products simple -- methane generation.
Physical and chemical properties of biogas?Methane is a colorless, smell, toxic, foul gas, which is the main component of methane at room temperature is a colorless, tasteless, non-toxic, no smell of gas. The methane molecule is CH4, is simple hydrocarbons with a carbon atom and four hydrogen atoms. The weight of methane the air is more than 0.54, about half the lighter than air. Methane Solubility rarely, at 20 C, 100 kPa, 100 per unit volume of water, only 3 per unit volume of methane dissolved.Methane is simple organic compounds, is the quality of the fuel gas when burning blue flame, the highest temperature of 1? 400? Celsius. Pure methane per cubic meter of heat for 36 thousand and 800 heating coke. The amount of methane per cubic meter about 23 thousand and 400 coke, equivalent to 0.55 kg or 0.8 kg of diesel after the full combustion heat of coal. From the analysis of the thermal efficiency, per cubic meter of biogas can use heat, equivalent to 3.03 kilograms of coal combustion can use heat.
