Composition and Characteristics Analysis of Terminal Municipal Solid Waste of a City in South China in the Last Decade
The changes in composition and characteristics of terminal municipal solid waste(MSW)were analyzed based on the monitoring data which collected in the last decade from a city in South China.The results indicated that food waste consistently constituted the highest proportion of wet-based components in MSW,ranged from 45.9%to 55.1%;followed by rubber and plastic,paper,and textiles,which were 21.1%-27.8%,5.6%-14.5%,and 4.0%-10.5%,respectively;the proportion of all other wet-based components accounted for no more than 5.0%.The bulk density of MSW ranged from 197 kg/m3 to 278 kg/m3,and the moisture content ranged from 53%to 60%.The content of wet-based combustible changed little overall in the last 10 years,with an average value of 37%;the wet-based content of ash decreased from 11%to 6%.In the past 10 years,the wet-based low calorific value of MSW showed an overall upward trend,which increased from 5 571 kJ/kg to 6 361 kJ/kg.The content of carbon,hydrogen,and oxygen in the dry basis all showed an increasing trend in the last decade,the carbon content increased from 37.6%to 44.6%,the hydrogen content increased from 5.51%to 6.51%,and the oxygen content increased from 24.5%to 25.4%.Meanwhile,the content of nitrogen and chlorine in the dry basis both decreased,the nitrogen content decreased from 2.95%to 1.45%,and the chlorine content decreased from 0.51%to 0.45%,while the sulfur content increased from 0.15%to 0.22%.The research results could provide a reference for the selection of terminal treatment method of MSW and the optimization of terminal treatment facilities in this study area.
municipal solid wastephysical compositioncalorific valueelement
万方数据
维普
