STUDY OF SPENT COFFEE GROUNDS TREATMENT INTO BIO OIL IN BANDUNG CITY

• Main Author: Ajeng Setyorini, Feliciana
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/51258
• Institution: Institut Teknologi Bandung

Coffee is one of the most popular drinks in the world and the second largest trading commodity after petroleum. According to the International Coffee Organization (2020), coffee consumption in Indonesia has increased by 4% over the past three years. This can be showed by the proliferation of local coffee shops in big cities in Indonesia, one of which is Bandung. The increment of coffee consumption boost the increase in waste generated due to the process of making coffee beverages which produces waste in the form of spent coffee grounds. However, the current condition of Sarimukti Landfill has exceeded its service capacity. To solve this problem, it is necessary to have spent coffee grounds treatment. Spent coffee grounds contain compounds that can be reused so that they can be processed into bio oil as a form of energy recovery. The purpose of this study was to determine technology for processing spent coffee grounds and potential for bio oil that could be produced. Determination of spent coffee grounds technology uses the SAW (Simple Additive Weighting) method. The research data were collected through literature studies and interview with 23 local coffee shop owners in Bandung to find out the actual conditions of spent coffee grounds management and to obtain primary data in the form of spent coffee grounds. The results of interview showed that spent coffee grounds generation was 2.43 kg/day/shop. Treatment of coffee grounds into bio oil using hydrothermal liquefaction able to process 0.695 tons per day spent coffee grounds into 0.329 tons per day bio oil. The processing spent coffee grounds also generates a global warming potential of 280.774 kg CO2eq. In addition, the method of processing spent coffee grounds with hydrothermal liquefaction can be said to be economically feasible. This can be shown by the results of economic analysis in the form of NPV is Rp 8,134,534,771.14, the BCR is 2.74 and the PBP is 3.6 years.