| Municipal solid waste is a comprehensive solid waste generated by urban residents in their daily life and work.It has complex components and contains a large amount of harmful substances.If it is not handled properly,it will cause serious pollution to the atmosphere and soil and threaten the health of residents.At present,with the continuous population growth,the economic level and the living standards of urban residents continue to improve,"garbage siege" has become a major problem facing China and developing countries that belong to "Belt and Road",for example,Indonesia.The problem restricts their urban modernization and has became bottlenecks of sustainable development.It is a national focus issue that need to be addressed urgently.Understanding the physical and chemical characteristics of domestic waste is a prerequisite for designing its disposal methods,but relevant data for Indonesia are lacking.This study collected municipal solid waste from 7 typical cities in Indonesia and subdivided it into 7 categories.It focused on investigating the physical components and chemical characteristics of municipal solid waste,exploring the impact of changes in seasons and locations on its physical components and understanding the physical and chemical characteristics of the overall municipal solid waste in Indonesia.The thermal conversion characteristics and basic composition of the solid waste in Indonesia were studied by methods such as thermogravimetric analysis(TG).Many characteristics of the coupled pyrolysis reaction of food waste and plastic waste in Indonesia were determined.Research shows that the average composition of household waste in Indonesia is food waste(27.50%),mixed waste(20.42%),plastic waste(19.41%),paper waste(14.54%),wood waste(9.25%),textile waste(4.90%)and non-combustible waste(3.98%).Seasonal changes have a small impact on the composition of municipal solid waste in Indonesia.The composition of waste in different cities varies greatly.Wood,textile,and non-combustible waste vary little with the season and place.Food,paper,plastic waste and mixed waste meet the normal distribution conditions.The 90% confidence intervals of their contents are 19.52 ~ 35.49%,11.25 ~ 17.84%,14.46 ~ 24.36%,and 13.45 ~ 27.38%,relatively.Municipal solid waste of Indonesia has high moisture,high volatile content,high hydrocarbon content,and contains more organic matter.Moisture content is the main factor affecting the heat value of waste in Indonesia.The average heating value of the sample reached 8.6MJ / Kg,which is higher than that of other countries and greatly exceeds the minimum heating value recommended by the World Bank for waste heat treatment.Whether it is waste incineration,pyrolysis or gasification during heat treatment,Indonesia's municipal solid waste are all feasible.Through TG and DSC analysis,the reaction temperature range,the peak position of the reaction rate and the amount of energy required for complete pyrolysis of various types of Indonesian municipal solid waste pyrolysis reaction processes are obtained.The complex municipal solid waste is simplified into several basic substances.Which substances are mainly decomposed at each stage in the pyrolysis process is analyzed.The thermal conversion characteristics and kinetic mechanism of coupled pyrolysis of Indonesian food waste and plastic waste are studied.The research shows that in the second stage of coupled pyrolysis of food waste and plastic waste,although the synergy between them increases the reaction rate and causes the weightlessness peak to appear in advance,the mechanism of the pyrolysis reaction is same as the mechanism of the pyrolysis of plastic waste as a single component. |
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