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Physicochemical properties and resource utilization of aged refuse in informal landfill |
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Abstract In order to explore the resource utilization of aged refuse in informal landfill, in this study, the municipal aged refuse collected from Dongguan Qiaoli Landfill in Guangdong Province were investigated. Mixed sample solid waste were sorted manually and divided into several groups according to different sizes, their physical composition and chemical properties were analyzed. The result indicated that: aged refuse from the group of 0~40mm were mainly humus soil and accounting for 47.3% of total aged refuse, while aged refuse from the group of >40mm were mainly combustible refuse and accounting for 40.1%, such as plastic, fabric, bamboo etc. The 40mm was reasonable for sieving particle size in engineering application, above 40mm were mainly combustibles, and others were mainly humus soil. The humus soil can reach the standard of maturity index of composting, in terms of the control standards for urban wastes for agricultural use (GB8172-1987),the content of nutrient in humus soil is qualified, but the content of partial heavy metal was over standard. These combustible refuse could be incinerated with calorific value of about 6000kJ/kg, when these combustible refuse were prepared of refuse derived fuel (RDF), there calorific value can incrsase to 10000~24000kJ/kg .
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Received: 14 October 2013
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