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Municipal solid waste management and landfilling technologies: a review

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Abstract

The USA, China and India are the top three producers of municipal solid waste. The composition of solid wastes varies with income: low-to-middle-income population generates mainly organic wastes, whereas high-income population produces more waste paper, metals and glasses. Management of municipal solid waste includes recycling, incineration, waste-to-energy conversion, composting or landfilling. Landfilling for solid waste disposal is preferred in many municipalities globally. Landfill sites act as ecological reactors where wastes undergo physical, chemical and biological transformations. Hence, critical factors for sustainable landfilling are landfill liners, the thickness of the soil cover, leachate collection, landfill gas recovery and flaring facilities. Here, we review the impact of landfill conditions such as construction, geometry, weather, temperature, moisture, pH, biodegradable matter and hydrogeological parameters on the generation of landfill gases and leachate. Bioreactor landfills appear as the next-generation sanitary landfills, because they augment solid waste stabilization in a time-efficient manner, as a result of controlled recirculation of leachate and gases. We discuss volume reduction, resource recovery, valorization of dumped wastes, environmental protection and site reclamation toward urban development. We present the classifications and engineered iterations of landfills, operations, mechanisms and mining.

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Abbreviations

CO2 :

Carbon dioxide

CO:

Carbon monoxide

$/toe:

Dollars per tonne of oil equivalent

$/ton:

Dollars per tonnes

FAO:

Food and Agricultural Organization

GJ:

Gigajoules

HID Global:

Hughes identification devices

H2 :

Hydrogen

H2S:

Hydrogen sulfide

kcal/kg:

Kilocalorie per kilogram

kg/capita/day:

Kilogram per capita per day

kg:

Kilogram

km:

Kilometer

kWh/m3 :

Kilowatt hour per cubic meter

kWh:

Kilowatt hour

MW:

Megawatt

M:

Meter

CH4 :

Methane

mg/L:

Milligram per liter

mV:

Millivolts

MSW:

Municipal solid waste

N2 :

Nitrogen

OECD:

Organisation for Economic Co-operation and Development

O2 :

Oxygen

Pa:

Pascal

PAYT:

Pay as you throw

%:

Percentage

pH:

Potential of hydrogen

t.km:

Tonne-kilometer

tonnes/day:

Tonnes per day

USEPA:

United States Environmental Protection Agency

vol.%:

Volume percent

wt%:

Weight percent

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Acknowledgements

The authors would like to thank the Natural Sciences and Engineering Research Council of Canada (NSERC), MITACS and the City of London, Ontario, for funding this research.

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Correspondence to Sonil Nanda or Franco Berruti.

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Nanda, S., Berruti, F. Municipal solid waste management and landfilling technologies: a review. Environ Chem Lett 19, 1433–1456 (2021). https://doi.org/10.1007/s10311-020-01100-y

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  • DOI: https://doi.org/10.1007/s10311-020-01100-y

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