30 Apridio Faiz An Nabil 1 , Irsya Emilia Putri 1 , Dessy Ariyanti 2 , Erwan Adi Saputro 1 * 1 Department of Chemical Engineering Faculty of Engineering, University of Pembangunan Nasional “Veteran” Jawa Timur, Jl. Rungkut Madya No. 1, Gunung Anyar, Surabaya City, East Java 60294, Indonesia 2 Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro, Semarang, Indonesia. 50275, Indonesia. Keywords: Briquettes, Carbonization, Starch adhesive, Arpus adhesive. Article history: Received 23 October 2021 Received in revision 5 May 2022 Accepted 25 May 2022 Published 30 May 2022 Abstract The industrial revolution, which has an impact on the emergence of environmental issues, began with the increasing demand for energy in global transportation, industry, and home activities. An idea that has good potential in reducing reliance on traditional energy sources is the innovation of processing waste into alternative energy sources. Processing plastic waste into plastic briquettes, an alternative fuel, including tertiary recycling. Several different techniques and adhesive materials can be used to turn plastic trash into alternative fuels. Only one type is produced via carbonization. Plastic briquettes (PP) can produce a higher heating value of 9982.779±240.017 cal/gram and 3.90% ash content. It creates a high ash content but also has a 7024.56 calorie per gram and a 0.27% ash content from plastic briquettes (PET), which is a result of the impurities still present. Meanwhile, for the type of adhesive with the same composition as briquettes with starch adhesive, the heat value was 6328 kcal/kg, arpus 6366 kcal/kg. Despite having a higher calorific value, the arpus adhesive typically produces briquettes that emit black smoke due to the composition of the arpus which is made from rubber tree sap. INTRODUCTION The increasing need for energy in transportation, industry, and domestic activities around the world is the starting point of the industrial revolution which has an impact on the emergence of environmental problems. Climate change, economic growth, and changes in consumption and production patterns are factors that increase the accumulation of plastic waste in the world. Around 5 million tons of waste in the 1950s increased to 100 million tons/year. So it can be seen that with the increasing demand for plastic in the world, the accumulation of plastic  Coresponding Author: Erwan Adi Saputro erwanadi.tk@upnjatim.ac.id DOI: https://dx.doi.org/10.22487/25411969.2022.v11.i1.15812 This is an open access article under the CC BY-NC-SA license (https://creativecommons.org/licenses/by-nc-sa/4.0/) How to Cite: Nabil et al. “Comparison of various methods of processing plastic waste into economical briquettes ”Natural Science: Journal of Science and Technology, Vol. 11, No. 1: 30‒36, May 2022. waste will also increase (Bhoumick, 2016). The limited availability of primary energy sources in Indonesia encourages the government to look for alternative energy sources as an effort to fulfill very high energy consumption and reduce the use of fossil fuels in industrial and household activities. Plastics are often resistant to corrosion, have a low specific gravity, are ductile and strong, and are soft at cold temperatures, making them an ideal replacement for solid fuels like briquettes, which have high calorific value, rate of burning, and duration of combustion (Suryaningsih, 2010). Vol. 11, No.1: 30‒36 May 2022 EISSN: 2541-1969 ISSN: 2338-0950 https://bestjournal.untad.ac.id/index.php/ejurnalfmipa Review article Comparison of various methods of processing plastic waste into economical briquettes