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Recycling 2017, 2(3), 13; doi:10.3390/recycling2030013

Greenhouse Gas Emissions and Environmental Impact from Recycling the Organic Fraction of Solid Waste: Comparison of Different Treatment Schemes from a Life Cycle Perspective

1
LAR Laboratory, Dipartimento di Ingegneria, University of Perugia , Via G. Duranti 93, 06125 Perugia, Italy
2
CIMIS–Interuniversity consortium for machine and systems for the environment Via G. Duranti 67, 06125 Perugia, Italy.
*
Author to whom correspondence should be addressed.
Received: 24 April 2017 / Revised: 27 July 2017 / Accepted: 11 August 2017 / Published: 11 August 2017
(This article belongs to the Special Issue Organic Waste Management)
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Abstract

The emission of greenhouse gases and the impact from recycling the organic fraction of solid waste were investigated from a life cycle (LCA) perspective. Three different treatment schemes were investigated with the aid of a pilot apparatus including exclusively composting (COMP), integrated solid anaerobic batch not inoculated and post-composting (SADBPC), and an integrated solid anaerobic batch inoculated and post-composting (SADBPC-I). SADBPC-I and SADBPC generated an average of 300 NL/kgVS and 267 NL/kgVS of biogas, respectively. On the other hand, the amount of stabilized organic carbon contained in the organic fertilizer returned by COMP, SADBPC-I, and SADBPC led to a potential of 470 kgCO2 eq/Mg, 382 kgCO2 eq/Mg, and 545 kgCO2 eq/Mg sequestered in soils for each treatment scheme, respectively. The LCA study highlighted that the impact categories most affected were global warming and human toxicity cancer, and on average, the highest impact was detected for COMP. View Full-Text
Keywords: greenhouse gas emission; composting; integrated anaerobic/aerobic treatment; life cycle analysis; organic waste; solid anaerobic digestion batch greenhouse gas emission; composting; integrated anaerobic/aerobic treatment; life cycle analysis; organic waste; solid anaerobic digestion batch
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Maria, F.D.; Sisani, F. Greenhouse Gas Emissions and Environmental Impact from Recycling the Organic Fraction of Solid Waste: Comparison of Different Treatment Schemes from a Life Cycle Perspective. Recycling 2017, 2, 13.

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