Summary
This 2022 modelling study applied the DNDC (DeNitrification and DeComposition) biogeochemical model to quantify greenhouse gas emissions following biosolids application to farmland in North America. By simulating soil nitrification and organic matter decomposition processes, the authors estimated the magnitude and dynamics of soil-derived GHG fluxes in response to wastewater biosolids amendments. The work contributes to understanding the climate implications of land application of biosolids—a widespread agricultural practice for nutrient recycling and waste management.
UK applicability
The UK applies significant quantities of wastewater biosolids to agricultural land; however, findings from North American soil and climatic conditions may require local validation. Results are likely applicable to UK temperate agricultural systems, particularly regarding emission factors and modelling approaches that could inform domestic GHG inventories and biosolids management policy.
Key measures
Greenhouse gas flux rates (N₂O, CH₄, CO₂); nitrification and decomposition processes simulated via DNDC model; cumulative emissions in response to biosolids application rates
Outcomes reported
The study used the DNDC biogeochemical model to simulate and quantify greenhouse gas emissions (nitrous oxide, methane, and carbon dioxide) from soil following biosolids amendment. The modelling estimated soil-derived GHG fluxes across different biosolids application scenarios.
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