Biochemical methane potential assessment of municipal solid waste generated in Asian cities: a case study of Karachi, Pakistan

摘要

This paper provides an estimation of power generation potential along with economic and environmental benefits of biochemical methane production from MSW. The biochemical methane potential (BMP) test of the MSW generated in Karachi, Pakistan was conducted by using the fresh synthetic waste sample.Through the analysis of the results obtained in this study and the available data of the MSW generation (quantity, organic fraction, and moisture content) in Karachi, it is estimated that every year about 5600 tons of methane are released to the atmosphere adding enormous share in global climate change.This study estimated that about 63 MW electric power can be generated by establishing biowaste digestion plants with power generation facilities in the city. The generated power can contribute 2.1% share in daily power supply and 21 % power shortage can be reduced as well. Additionally, about 401.3 million PKRs (2.6 million US$) revenue can be earned every year by selling the power generated by utilizing the MSW in waste to energy plants. Moreover, 0.13 Mt CO_2eq/annum greenhouse effect caused by methane emissions from open disposal of MSW can be eliminated.