Priedų įtaka metano susidarymui organinių atliekų anaerobinio kompostavimo procese

Abstract

Composting - is a process of substance microbiological transformation. Organic elements that are in waste products provoke exothermic process and educe of carbon dioxide and methane. Further on it will be examined the process of decay of organic waste products. One of the final products of the anaerobic decay is methane. Due the fact this process is also called the process of fermentation of methane. Gas mixture, the main components of which are methane (CH4) and corbonic acid (CO2) is called biogas. There are also azoth and hvdrogen sulphide in the mixture. When analyzing the biogas structure with precise equipment it could be also found signs of nitrogen and some heavy hydrocarbons. The result of methane and air interaction is an explosive mixture, which the methane percentage makes 5-15% of that of the air can explode. Methane is the main and the most valuable component of biogas. It is calculated the thermo value of biogas with 75% of methane seeks up to 28MJ m3 Experimenting with organic waste products of different structure it was aimed to find out how it is possible to change the qualitative and quantative composition of the waste, mainly the concentration of methane. During the period of two months the anaerobic decay of organic waste products of 3 types was observed and the changes of concentration of composing parts of biogas was stated. Afterwards the concentrations of methane were compared. The biggest part of the foodstuff waste goes to the dump of consumer everyday products. The organic part of the waste after fractioning comes freely into atmosphere. If organic part could be separated from non organic and processed in a proper way it would be possible to use methane quantities for energetic purposes.