BIOGAS PRODUCTION POTENTIAL FROM MUNICIPALORGANIC WASTES IN DHAKA CITY, BANGLADESH

Nusrat Jahan Imu, Dido Mann Samuel

Abstract: This study aimed at assessing the biogas production potential from municipal organic wastes and conversion of biogas to electric energy for Dhaka, Bangladesh. The generation of solid waste and demand for energy is increasing simultaneously in Dhaka city due to the rapid growth of population and industrialization. As a source of renewable energy using of municipal organic waste should be encouraged to save the environment from harmful GHG as well as to minimize the energy deficiency. Among the various biogas production technologies, anaerobic digestion is one of the promising and environmental friendly technology for treating organic waste. In Dhaka city, there are huge potential to produce biogas from municipal waste because the volume of solid waste of this city is 4000-5000 ton/day with composition of ¾ percentage organic waste. Bio-waste (food waste) was used as feedstock for anaerobic digestion process. Two inoculums-sewage sludge and digested maize silage were used with organic waste. About 0.57 m3 /kgODM of biogas and 0.22 m3 /kgODM methane was produce from the anaerobic digestion (AD) of a mixture of bio waste and digested maize silage. Consequently, 0.094 m3 /kgODM of biogas and 0.043 m3 /kgODM methane was generated from the fermentation of bio waste with sewage sludge. Biogas-to-electricity potential was found to be 83.66 MW based on the lower value of 0.094 m3 /kgODM volume biogas produced, which accounts for about 3.8% of the present demand of Dhaka city.

Keywords: Municipal organic waste, anaerobic digestion, biogas, energy generation, electricity

DOI: https://doi.org/10.15623/ijret.2014.0301078