The circular economy is a tool to achieve the criteria for sustainable development in the solid waste processing. In addition to the advantages, many disadvantages have been identified in the application of this measure. With regard to the recycling of raw materials, the main one is the lack of traceability of the product over several production life cycles. The assessment of the advantages and disadvantages should be done after a thorough analysis of the processing data. Therefore, according to the regulatory framework, a method for tracking material flows based on blockchain has been proposed. The object of the research is a plant for solid household waste in Sofia. The plant's raw materials are classified into four streams: landfill, sale products, combustion products as refuse-derived fuel (RDF), and recycling. Conceptual models based on Distributed Ledger Technology (DLT) have been proposed to track the main material flows from the plant. The choice of a specific application as a Blockchain platform will depend on the parameters of the communication scheme. The data stored in the blocks will be the starting point for the analysis and tracking of the full processing cycle.