MANAGEMENT OF AGRICULTURAL POST-PRODUCTION RESIDUES FOR ENERGY PRODUCTION IN RURAL AREAS - A CASE STUDY
Keywords:biogas, agriculture waste, agriculture post-production residues, renewable energy source
The paper shows - from the point of view of the need to increase the share of energy obtained from renewable sources, examples of "good energy practices" for four locations. This goal is primarily related to the reduction of climate changes caused by high GHG emissions - but also fits in the "zero waste" strategy in the case of using post-production biomass as an energy source. Examples are described showing four RES installations in operation - two at the farm level and two at the municipal level. The data for the individual installations are summarized. All the described installations are located in north-eastern Poland - in the Warmian-Masurian Voivodeship. Biogas installations in two farms are described - one micro installation and one large. A large installation has a power of 0.999 MWe and 1.1 MWt, and a small one – 11 kW of electric and thermal power. In the case of a large biogas plant, the investment cost for W is 21% of the investment cost for a micro biogas plant. Operating costs of biogas plant operation in relation to the installed capacity - micro-scale biogas plants are only 59% of costs for a large biogas plant. It was shown how a particularly large biogas plant can cooperate with the local community - by distributing heat from cogeneration to the municipal heat network. On the other hand, two municipalities that have invested in ecological heat sources are described. In one case, it is biomass-fired boilers - providing some of the residents of the commune and communal buildings with domestic hot water. and central heating - and in the second - installation of heat pumps to cover the needs of the municipal school. These examples show that it is possible to implement such solutions. At the same time - local communities, which are often opposed to investing in renewable energy source (RES) in their vicinity, should be made aware of what social, energy and general benefits are associated with such solutions. Due to the calculated factor of 0.2% of biogas installations in relation to the number of potential farms where such installations are possible and justified - the promotion of such "good energy practices" is absolutely necessary.