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Nitrous oxide and methane emissions from storage and land application of organic fertilisers

with the focus on sewage sludge

Willén, Agnes (2016). Nitrous oxide and methane emissions from storage and land application of organic fertilisers. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2016:74
ISBN 978-91-576-8650-3
eISBN 978-91-576-8651-0
[Doctoral thesis]

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Organic fertiliser handling contributes to greenhouse gas emissions. Through storage and field experiments, this thesis examined strategies to reduce emissions of nitrous oxide (N₂O) and methane (CH₄) from storage and after land application of cattle slurry (CS) and sewage sludge (SS). Non-digested CS without a roof (1) and digested CS without (2) or with a roof (3) were stored during three months in summer and winter. Mesophilically digested SS without cover (1), with cover (2) or treated with ammonia (NH₃) and with cover (3), and thermophilically digested SS with cover (4), were stored during one year. CS treatments (1) and (3) were applied to soil in spring or in autumn. SS treatments (3) and (2) were applied in spring and autumn, respectively, and were either incorporated into the soil immediately or after four hours. A life cycle assessment was conducted to assess the impact on global warming potential, acidification potential, eutrophication potential and primary energy use of different management strategies for SS.

Digested CS had significantly higher CH₄ emissions than non-digested CS during summer storage. Using a roof in summer decreased CH₄ and increased N₂O emissions significantly, but these cancelled each other out on a global warming basis. Emissions of N₂O and CH₄ were small during winter storage and after land application. Treatment with NH₃ significantly reduced N₂O emissions from SS during storage and tended to lower CH₄ emissions. Thermophilically digested SS had more air-filled pores during storage and emitted significantly more N₂O than other treatments, but had the lowest CH₄ emissions. Emissions of N₂O after SS application to soil were low, but stimulated by wet soil and precipitation, while CH₄ emissions were negligible, with no differences between immediate and delayed incorporation. The LCA revealed that shorter storage time and covered storage could mitigate the environmental impact from SS management. NH₃ treatment generally reduced negative impacts on environment categories except for primary energy use, which was highest for this treatment. A combination of autumn and spring application was preferable to autumn-only application for most treatments through lowering total storage time.

Authors/Creators:Willén, Agnes
Title:Nitrous oxide and methane emissions from storage and land application of organic fertilisers
Subtitle:with the focus on sewage sludge
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :2016
Depositing date:24 August 2016
Number of Pages:84
IRodhe, L., Ascue, J., Willén, A., Vegerfors-Persson, B. & Nordberg, Å. (2015). Greenhouse gas emissions from storage and field application of anaerobically digested and non-digested cattle slurry. Agriculture, Ecosystems & Environment, vol. 199, pp. 358-368.
IIWillén, A., Rodhe, L., Pell, M. & Jönsson, H. Nitrous oxide and methane emissions during storage of dewatered digested sewage sludge. Submitted.
IIIWillén, A., Jönsson, H., Pell, M. & Rodhe, L. (2016). Emissions of nitrous oxide, methane and ammonia after field application of digested and dewatered sewage sludge with or without addition of urea. Waste and Biomass Valorization, vol. 7 (2), pp. 281-292.
IVWillén, A., Junestedt, C., Rodhe, L., Pell, M. & Jönsson, H. Sewage sludge as fertiliser – environmental assessment of storage and land application options. Submitted.
Place of Publication:Uppsala
Publisher:Department of Energy and Technology, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-576-8650-3
ISBN for electronic version:978-91-576-8651-0
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:F Plant production > F04 Fertilizing
Q Food science > Q70 Processing of agricultural wastes
T Pollution > T01 Pollution
Subjects:(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 211 Other Engineering and Technologies > Other Engineering and Technologies not elsewhere specified
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 405 Other Agricultural Sciences > Environmental Sciences related to Agriculture and Land-use
Agrovoc terms:slurry, greenhouse gases, methane, nitrous oxide, emission reduction, organic fertilizers, storage
Keywords:cattle slurry, greenhouse gas mitigation, methane, nitrous oxide, organic fertiliser, land application, sewage sludge, storage
Permanent URL:
ID Code:13596
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Energy and Technology
Deposited By: Agnes Willén
Deposited On:24 Aug 2016 10:08
Metadata Last Modified:10 Sep 2020 13:41

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