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Land application of pulp and paper mill sludge may reduce greenhouse gas emissions compared to landfilling

Faubert Patrick, Lemay-Bélisle Catherine, Bertrand Normand, Bouchard Sylvie, Chantigny Martin H., Paré Maxime C., Rochette Philippe, Ziadi Noura et Villeneuve Claude. (2019). Land application of pulp and paper mill sludge may reduce greenhouse gas emissions compared to landfilling. Resources, Conservation and Recycling, 150, p. 104415.

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URL officielle: http://dx.doi.org/doi:10.1016/j.resconrec.2019.104...

Résumé

Land application of pulp and paper mill sludge (PPMS) may replace landfilling in certain jurisdictions. However, the consequences of this change in management on greenhouse gas (GHG) emissions from PPMS are unknown. Land application may also entail temporary storage by landfilling due to a timing mismatch between PPMS production and application. We quantified direct GHG emissions from landfilled PPMS (pilot scale; N-rich and Npoor types) over two snow-free seasons, and after application of previously landfilled PPMS (LPPMS;<6-month landfilled) to a clay loam soil cropped to wheat over one snow-free season. Landfilling of N-rich PPMS induced the highest GHG emission factor (EF; 0.26 Mg CO2-equivalent Mg−1 dry PPMS) and generated substantial N2O emissions (2% of landfilled N), which are neglected by the current assessment methods. Landfilling of N-rich PPMS also resulted in the highest CH4 emissions (0.6% of landfilled C). Replacing urea with LPPMS to fulfill wheat N requirements did not change field N2O-N EFs (1.1–3.5% of applied N) and did not generate CH4. Shortterm (1–2 years) GHG (CO2-equivalent) EFs with landfilled N-rich PPMS were 0.54 to 4.48 times the EFs reported in the literature for land-applied PPMS. Long-term EF estimates suggest that landfilled PPMS may increase GHG emissions by up to three times compared to land application. Further research at the industrial scale is warranted to reduce uncertainty on GHG emissions from PPMS landfill sites, fulfill sustainable development goals and determine accurate carbon credits associated with changes in PPMS management practices.

Type de document:Article publié dans une revue avec comité d'évaluation
Volume:150
Pages:p. 104415
Version évaluée par les pairs:Oui
Date:2019
Sujets:Sciences naturelles et génie
Sciences naturelles et génie > Sciences naturelles
Sciences naturelles et génie > Sciences naturelles > Biologie et autres sciences connexes
Département, module, service et unité de recherche:Départements et modules > Département des sciences fondamentales
Mots-clés:Biosolid, paper mill sludge, greenhouse gases, landfilling, land application, fertilization
Déposé le:01 sept. 2020 22:43
Dernière modification:01 sept. 2020 22:43
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