The Mascot (Market Waste Composter) for Market Waste of Developing Country—case Study: Jakarta, Indonesia

The large generation of biodegradable waste in developing countries, such as Indonesia, has made composters one of the best processing solutions. Kebayoran Lama Market, as one of the central markets in Jakarta province, has a high waste generation due to its 24-hour market activities. This study aims to design Mascot, a compact aerobic composter with practical, hygienic, and easy-to-operate characteristics. The Analytic Hierarchy Process (AHP) method was employed to determine the appropriate material for the composter drum. The parameters measured are physical parameters which are easy to do by the general public. The parameters observed included pH, temperature, material shrinkage, and leachate level. By considering the characteristics of market waste, which has high water content, it was designed to have two main compartments to accommodate compost and leachate. The percentage of compostable volume shrinkage that occurs during the composting process is 61.25%, and the leachate produced is 26.46 liters. The highest temperature of the composting material was 45°C, with a final composting temperature of 31°C. The lowest pH condition occurred 1 day after composting started with a value of 5.5, then the pH value increased gradually until the final composting process (pH 7). The composting process takes 30 days to produce mature compost, while general composting takes 40–60 days to produce mature compost.