Abstract:-  A pilot production biogas plant based on solar heating has been developed and built. The results of experimental studies on biogas production in the mesaphilic mode of the installation are presented. The possibilities of using biogas plants in the conditions of small farms are considered. Currently, economically developed and developing countries are developing at an accelerated pace on the practical use of alternative energy sources as an important factor in sustainable development and increasing the competitiveness of economies in the face of a reduction in global reserves of hydrocarbons [1].

Uzbekistan has accumulated significant experience in scientific and experimental research in the field of using alternative energy sources, primarily solar and biogas energy, for which development has been carried out for many decades [2].

Currently, a large number of plants for the production of biogas from organic waste have been developed and are operating in various countries. However, most scientifically grounded biogas plants are intended for processing waste from large livestock complexes and provide for heating the fermented biomass using electricity or thermal energy from centralized networks, which hinders the effective disposal of waste from individual and small farms dispersed in regions with no centralized energy supply [3,4 ]. On the other hand, the change in the structure of agricultural production in connection with the transition to market conditions led to an increase in the number of private dekhkans and farms. When solving issues of energy supply for everyday life, individual and farms in remote areas of Uzbekistan, which do not have centralized electricity and gas supply, are in need of imported fuel materials [5].

Therefore, the development of autonomous bioenergy plants (BEU) with heating of fermented biomass at the expense of local renewable energy sources is an urgent problem, the solution of which contributes to the direction of effective waste disposal while ensuring environmental safety in agricultural production in hard-to-reach regions.

All this dictates that for the large-scale use of biogas plants in farms and individual agriculture, first of all, given their regional

and local conditions, the need to develop small energy-saving, economical, environmentally friendly and high-performance biogas plants [6].