Simulation of sustainable solid waste management system in Khulna city

Abstract

Abstract Municipal solid waste management (MSWM) is the major environmental concern for Khulna, the third largest city of Bangladesh. The aim of the study was to determine the most environmentally friendly option of MSWM system for Khulna city. The present system of MSWM in Khulna city was chosen as the baseline scenario in which recycling, composting and landfilling are 9.1, 4.4 and 86.5% respectively of the total managed waste. Different scenarios were developed by varying the percentage of recycling, composting and landfilling. The life cycle inventory analysis of MSWM system was done by integrated waste management model for each scenario. The model outputs of each scenario were classified into impact categories: emission of the following pollutants: greenhouse gases, acidic gases, smog precursors, heavy metal and organics to air and to water as well as quantity of residual waste and energy consumption or recovery. In the context of the aforesaid impact categories, scenario 7 consist of 71% composting, 13.6% recycling and 15.4% landfilling is the most favorable alternative for Khulna city.

Keywords

• Municipal solid waste
• Life cycle assesment
• Greenhouse gases
• Energy consumption