Pengembangan model simulasi proses pengomposan sampah organik perkotaan dalam bioreaktor

Abstract

Municipal solid waste or MSW has potency to be decomposed by microorganisms and transformed into compost. The waste contains 60%-75% of organic materials C, H, O, and N. The aim of this research was to develop a simulation model based on mathematical equations describing the phenomenon of the rate CO2 production, the rate of H2O production, the rate of carbon nitrogen ratio or C/N, and temperature were the variables tested in this research. Validation was carried out by comparing datum of simulation model with datum of composting. Simulation model was declared valid if the values of each parameter were r2 > 0.75, the total value of Rrr was closed to zero, and the distribution of Err was independent to time. The sensitivity test was analyzed by comparing the value the simulation model in predicting the microorganism population, CO2, O2, and temperature could be expressed respectively as y' = 1.06(y-1.003), y' = 1.07(y+0.07), y' = 1.02(y+0.05) and y' = 1.02(y-1.05). The temperature, the C/N and the rate of O2 consumption were sensitive to the changes of microorganism population and the radius of the bioreactor.