Abstract
Landfills are urban stocks and resource reservoirs for potential energy recovery. The purpose of this study is to evaluate the amount of energy that could be recovered from aged waste (around 5–20 yr old) recovered from landfills. Investigations were conducted on the physical and chemical properties of refuse-derived fuel (RDF) prepared from recovered landfill waste (RLW) in Andhra Pradesh, India. Waste characterization studies include determination of waste composition, proximity analysis, ultimate analysis, and energy content. The moisture content ranged between 25.7 to 31.3% and no trend was observed with age. In the ultimate analysis, the percentage of carbon increased from 42.9 to 71.7% with the age of the samples, this is due to an increase in the plastic content over time. The calorific value of the recovered landfill waste ranged from 10.4 to 21.8 MJ kg− 1. From the findings, it can be summarized that the RDF can potentially be utilized as a feedstock for the recovery of energy from RLW. The results from this study will assist policy makers and local authorities in designing and developing strategies for resource and energy recovery from landfills in different urban cites across the globe.
Highlights
The amount of solid waste generated globally is expected to increase from 2010 t in 2016 to 3400 t by 2050 [1]
The present study investigated the energy potential of landfill recovered waste based on the physico-chemical characteristics of the waste
Soillike material, and plastic are the major components of the aged waste recovered from landfill
Summary
The amount of solid waste generated globally is expected to increase from 2010 t in 2016 to 3400 t by 2050 [1]. Population growth, rapid urbanization, demographic transfers, living habits, industrial, and economic developments are contributing factors to the increase in waste generation trends [2]. The handling, processing, treatment, and disposal of waste play a vital role in development of good solid waste management (SWM) systems [3]. It is estimated that municipal governments spend 20–50% of their annual budget on solid waste handling and management [1]. The cost benefit matrix in terms of resource recovery from solid waste is currently negative.
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