Authors: Elissa Saliba, Anne-marie Boulay, Michael Boh, Grant O. Clark
Identifier: CSBE21425
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Published in: CSBE-SCGAB Technical Conferences » 5th CIGR and AGM Quebec City 2021 » Regular Sessions

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Description: As more Canadian jurisdictions ban the landfilling of organic matter, there is increasing pressure to recycle municipal wastewater biosolids to agricultural soils to replace commercial fertilizers. However, information gaps remain about the environmental impacts of this practice. We conducted a Life Cycle Assessment (LCA) to quantify the environmental impacts associated with the processing and land application of three different types of biosolids: anaerobically digested, composted, and lime stabilized. The biosolids were applied to agricultural land on McGill?s Macdonald Campus Research Farm near Montreal, Canada. OpenLCA coupled with the Ecoinvent 3.5 database was used to perform a Life Cycle Assessment of the three processing methods to determine their global warming, eutrophication, and acidification potential. Monte Carlo simulation was used in the estimation of uncertainties in the LCA. Preliminary analysis indicates that the land application of anaerobically-digested biosolids results in the least global warming potential due to the production of biogas. Land-application of lime-stabilized biosolids has a higher global warming potential related to the energy-intensive production of quicklime used to stabilize the sludge. Based on this analysis, we will recommend best practices for biosolids management. The results will be useful to decision makers, wastewater plant operators, and farmers to ensure sustainable and responsible production and handling of biosolids. Final results will be presented at the CSBE/CIGR conference in Quebec, Canada.

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Date: 2021-06-11
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Conference name: 5th CIGR International Conference and CSBE-SCGAB AGM 2021, Quebec City,QC, 11-14 May 2021.
Session name: GHG Emissions, Climate Change & Adaptation 2

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Type: Text.Abstract
Publication type: Presentation
Coverage: Canada
Language 1: en
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Rights: Canadian Society for Bioengineering
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