Waste management in Boyolali Regency is one of the challenges to achieve the smart city criteria. Garbage in Bolali Regency contains 56.12% plastic composition and 37.13% garden waste. Plastic and garden waste has a calorific value that exceeds 5000 kcal/kg, so it can be used as briquettes. The purpose of this study is to analyze the proper planning and can be carried out in Boyolali Regency by using the carbonization process to produce quality briquettes. The waste processing process consists of the process of sorting plastic waste and garden waste, then counting, then carbonization is carried out, so that briquettes are obtained according to standards. The total waste treated is about 90 ton/day and 45 ton/day, for plastic waste and garden waste respectively. If this process is applied at least, it can reduce as much as 50.77% of waste generation in Boyolali Regency. The total recovery of waste energy from the carbonization facility can reach 5611384.6 MJ/day. The land requirement from the processing process reaches 117 ² with the layouting process having dimensions of 264 m x 65 m.

The waste composition in Boyolali Regency consists of 37.13% garden waste. The waste can be treated with a thermal process so that it can be reused for energy. The method of sorting waste with thermal technology consists of various types adapted to the gods. This study aimed to evaluate the most co-cog heat treatment processes for waste processing in Boyolali Regency. The determination process is carried out using a literature review, while the selection process uses the Analytical Hierarchy Process (AHP) method. The alternatives given in this research are carbonization, pyrolysis, and synergy processes. In the alternative selection, there are three criteria, namely mass balance, CO2 residue, and energy volatility. In terms of mass balance, the waste that the carbonization process can treat tends to be higher than that of the pyrolysis and incineration processes. Meanwhile, the carbonization process is better than pyrolysis and carbonization for wood waste for emission and energy requirements. The result of AHP shows that the carbonization process is suitable to be applied in Boyolali Regency. However, it is necessary to conduct further studies on non-technical aspects to strengthen alternative election results.