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Sustainability 2017, 9(10), 1804; doi:10.3390/su9101804

Life Cycle Analysis of Energy Production from Food Waste through Anaerobic Digestion, Pyrolysis and Integrated Energy System

1
Department of Environmental Sciences, Faculty of Science and Engineering, Macquarie University, NSW 2109, Australia
2
Research Centre for Energy Resources and Consumption (CIRCE), Campus Río Ebro, CIRCE Building Mariano Esquillor Gómez, 15, Zaragoza 50018, Spain
*
Author to whom correspondence should be addressed.
Received: 29 September 2017 / Revised: 4 October 2017 / Accepted: 4 October 2017 / Published: 5 October 2017
(This article belongs to the Special Issue Trends in Municipal Solid Waste Management)
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Abstract

The environmental performance of industrial anaerobic digestion (AD), pyrolysis, and integrated system (AD sequence with pyrolysis) on food waste treatment were evaluated using life cycle assessment. The integrated treatment system indicated similar environmental benefits to AD with the highest benefits in climate change and water depletion in addition to the increased energy generation potential and the production of valuable products (biochar and bio-oil). Pyrolysis results illustrated higher impact across water, fossil fuel, and mineral depletion, although still providing a better option than conventional landfilling of food waste. The dewatering phase in the AD process accounted for 70% of the treatment impact while the pre-treatment of the food waste was responsible for the main burden in the pyrolysis process. The study indicated that the three treatment options of food waste management are environmentally more favorable than the conventional landfilling of the wastes. View Full-Text
Keywords: life cycle assessment; environment; End-of-Life (EOL); food waste; digestion; pyrolysis life cycle assessment; environment; End-of-Life (EOL); food waste; digestion; pyrolysis
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MDPI and ACS Style

Opatokun, S.A.; Lopez-Sabiron, A.; Ferreira, G.; Strezov, V. Life Cycle Analysis of Energy Production from Food Waste through Anaerobic Digestion, Pyrolysis and Integrated Energy System. Sustainability 2017, 9, 1804.

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