Estimation of municipal solid waste generation rate and composition in Khon Kaen municipality

Abstract

The objective of this research is find out the generation rate and the composition of municipal solid waste at generation sources in Khon Kaen Municipality, and to investigate the factors that affect the solid waste generation. In each each source, several variables are utilized in developing regression model using multiple linear regression, indicates that residential solid waste generation is affected by number of peoples in the house and income level, store solid waste generation is affected by area and number of employees, private office solid waste generation is affected by area and number of workers, hotel solid waste generation is affected by price level, number of rooms, number of employees and number of electricity consumption units, restaurant solid waste generation is affected by dinning area, number of seats, number of employees and number of clients, primary school solid waste generation is affected by number of pupils, and government office solid waste generation is affected by area and number of officers. The generation rate for the whole municipality is estimated as 162 tons/day or 1.10 kg/capita/day. The portion by wet weight of solid waste generation in waste stream of residential, commercial, institutional and municipal service are 30.81%, 55.82%, 12.59% and 0.78% respectively. In composition analysis for the municipality the higher component are garbage, plastic, paper and wood which their portion by wet weight are 45.28%, 15.11%, 13.l2% and 10.02% respectively. The moisture content and bulk density of solid waste for the municipality are 52.87% and 233.0 kg/cu.m. respectively.