Management of the Municipal Waste Stream: Waste into Energy in the Context of a Circular Economy—Economic and Technological Aspects for a Selected Region in Poland

The goal of this paper is the research and analysis of municipal waste stream management in rural areas, potentially designed for energy purposes in thermal treatment systems. The research section includes granulometric, morphological, and physicochemical analyses to determine waste parameters. Studies have indicated that the calorific value for mixed municipal waste ranged between 6.5 and 9.5 MJ∙kg, while following mechanical treatment for the oversize fraction over 80 mm ranged between 11.6 and 12.7 MJ∙kg. The biodegradable fraction content analysis of waste—granulation 10 to 20 mm—demonstrated its presence at the level of 80%, which may be used to produce biogas. Studies have shown that the humidity level of waste generated in rural areas is in the range of 32.9 to 40.9%, which does not disqualify it from energy use in the production of refuse-derived fuel. Implementing a circular economy in the municipal waste sector aims at minimizing the use of raw materials, limiting municipal waste generation and greenhouse gases emissions, and increasing the level of energy use. Implementing new municipal waste management models is crucial to achieve a balanced, low-emission, waste-free, and competitive economy. The results are a significant research input for a group of municipal wastes generated in rural areas, such as refuse-derived fuel.