International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

Biogas is produced during the process of anaerobic digestion of organic waste. It is an important element of the purpose to minimize the dependence of natural gas, as well as to contribute to less pollution of the environment. The best way to achieve such goals, is to utilize every organic waste and produce valuable product. Alcoholic industry is a large sector and produces huge amounts of alcoholic beverages. Like any other food industry, there are organic wastes during and after the production process. One such organic waste is the stillage. It is a liquid waste material, produced after distillation. Stillage contains various nutrition elements, which could be used as feeding material for biogas production. As it is a way to utilize organic waste, there is a scientific interest to research the possibility to utilize it in an anaerobic digestion bioreactor to produce biogas. For that purpose, the stillage is mixed with cattle manure. The accumulated biogas could be used for heating, auxiliary electrical power (powering CNG generators) and as an alternative fuel for vehicles.

One of the most used types of biofuels is the biogas, produced during the process of anaerobic digestion of organic waste. The current project aims utilization of plant biomass waste, used to produce energy in the form of biogas, after proper pretreatment, in order to enhance energetic value and yield. Proper resource and method of pretreatment will be chosen, in order to obtain high biogas yields. The chosen technology will be tested in a plug-flow bioreactor to optimize the technical parameters.

The results of theoretical calculation of biogas yield in psychrophilic, mesophilic and thermophilic conditions, as well as in the combined fermentation of the substrate. Based on these data, the advanced technology combined fermentation of agricultural biowaste. This will provide baseline data for the development of new structural and technological schemes of biogas plants that will improve the efficiency of processing animal waste due to the intensification of the process of bioconversion.

The rational technology biotreatment of agricultural waste, including next operations: pre-preparation of raw materials, acid stage fermentation of the substrate and alkaline stage was developed. Advantage is manifested in the fact that in each phase are optimal conditions for the development and life activity of the microbial population, which is necessary to improve the efficiency of fermentation of biomass. The biogas plant with a double – chamber bioreactor was developed, scale tests conducted and their results were shown. A method of calculating the basic parameters of the technological equipment for processing waste were developed.