Waste-to-Energy Development Using Organic Waste Recycling System (OWRS): A Study Case of Giwangan Market

Food wastes were the major problem in the traditional market since there were inadequate organic waste processing facilities provided. Most of all these wastes end into the landfill, and the wastes have high energy recovery potential to be generated with a scientific treatment. This research proposes the waste-to-energy implementation planning for energy harvesting from the organic waste generation of the Giwangan traditional market, Yogyakarta Province, Indonesia by using organic waste recycling system (OWRS) as a pretreatment technology. The proposed recycling system consists of two major processes such as dewatering process and pyrolysis process. The dewatering process aims to decrease the water content and remind solids, where the pyrolysis process aims to convert solids into charcoals. The product of dry organic material from the OWRS system becomes the input for gasification to produce synthetic gas as fuel on the internal combustion engine. Pretreatment process by using OWRS system can increase the calorific value of food waste by 5,815.33 kcal/kg, and it can remove the water content of fruit waste and vegetable waste up to 99.25% and 99.06% respectively. The liquid product from OWRS system generates the C/N ratio with value 4.06. The implementation of OWRS system which produces the updraft for gasifier process can generate the energy by 5.14 kW and achieves the efficiency by 11% of electrical power from the total organic waste generated by Giwangan traditional market.