Abstract:
Solid waste, which is generated as a result of human activity on a daily basis, must be
appropriately managed. Metu, like other Ethiopian towns, is plagued by challenges
caused by poor solid waste management system. This study focuses on the amount of
waste generated, its characterization, and the recommendation of a waste energy
recovery method from MSW.
The study was conducted on 120 households that were chosen at random and are
thought to reflect all income levels: low, middle, and high. The daily waste generated
by those households was collected and sorted into its constituent parts, with the
weight and volume of each component recorded. This has been conducted for eight
consecutive days to determine the average daily household waste generation rate and
per capital daily generation rate.
According to the findings, the rate of solid waste output is directly proportional to the
income level of a family. According to the findings of this study, low, middle, and
high-income families produce 0.6281 kg/HH/day, 0.7570 kg/HH/day, and 0.9236
kg/HH/day, respectively; while the average household produces 0.7538 kg/HH/day.
Similarly, in the low, middle, and high-income levels, generation per capital per day
was 0.2094 kg/cap/day, 0.2165 kg/cap/day, and 0.2571 kg/cap/day, with an average of
0.2263 kg/cap/day. Every day, 2.2 tons of waste are generated in Metu town.
Food waste accounted for 41.03% of waste generated, followed by dusts and ashes at
31.67% and yard waste at 16.87%. Food waste and yard waste had moisture values of
59.55% and 20.0%, respectively. The sampled waste has a calorific value of
1,785.20kcal/kg. The results revealed that the bulk of the generated waste is organic,
with a high moisture content, necessitating the use of appropriate WtE technologies.
Anaerobic digestion (AD) for organic waste is the best and most viable WtE method,
according to the analysis. Because the current MSWM system lacks an energy
recovery method, vast amounts of waste are landfilled, which is the least preferred
choice in the waste management hierarchy.