FENOMENA DEGRADASI SAMPAH ORGANIK TERHADAP STABILITAS TEMPAT PEMROSESAN AKHIR (TPA)

Abstract

Solid waste is one of the major problems in Indonesia. The percentage of processed waste is only 10,09, and the rest of it is dumped in the landfill without any treatment. Approximately 50%-70 % of waste composition in Indonesia is organic waste that can be degraded easily over time. The degradation process affects the carbon mass balance. Organic waste degradation can form leachate, biogas(CH4 and CO2), and solid. Degradation process will change its density and it affects landfill stability, especially its safety factor. The anaerobic organic waste degradation in this study does not produce gas, the CO2 gas that is supposed to be formed tends to turn into acid contained in leachate. It is this that causes acidic pH leach with a pH range of 2,02 to 4,56 and an increasing EC value of 2,505-30,6 mS / cm. Organic waste degradation affects the its physical changes by changes in decreasing void ratios and pore pressures, as well as increasing density. The smaller the void ratio and higher the pore pressure, the greater the contact of microorganisms in the waste surcafe that can accelerate the process of degradation declined in physical characteristics influenced by leachate circulation. It also affect it SF. The uncompacted waste SF is between 1,43-1,91 and its average is 1, 685. Uncompacted waste SF is safe in the temporary and permanent landfill. The compacted waste SF is between 1,26-1,93 and its average is 1,535, although some points are below the standard for the temporary landfill and 5 points below the permanent lanfill standard. However, on average, compacted waste SF is safe for temporary and permanent landfill standards.