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Life Cycle Assessment of Biogas from Separated slurry
Contents
Preface
Definitions and abbreviations
Sammenfatning og konklusioner
Summary and conclusions
1 Introduction and objectives
2 Scope
3 Reference scenario for pig and for cow slurry (scenario A)
4 Biogas production from raw pig slurry and fibre fraction from mechanical-chemical separation (Scenario F) – results and interpretation
5 Biogas production from raw cow slurry and fibre fraction from mechanical-chemical separation (Scenario G) – results and interpretation
6 Biogas production from raw pig slurry and fibre fraction from mechanical screw press separation (Scenario H) – results and interpretation
7 Biogas production from raw pig slurry and fibre pellets (Scenario I) – results and interpretation
8 Sensitivity analysis
9 References
ANNEX A. REFERENCE SCENARIOS – Life Cycle Inventory Data
Not included here but in Wesnæs et al. (2009)
ANNEX B. ACIDIFICATION OF SLURRY – Life cycle Inventory Data
Not included here but in Wesnæs et al. (2009)
ANNEX C. SAMSON BIMATECH MECHANICAL SEPARATION – Life Cycle Inventory Data
Not included here but in Wesnæs et al. (2009)
ANNEX D. FIBRE PELLETS COMBUSTED IN ENERGY PLANT – Life Cycle Inventory Data
Not included here but in Wesnæs et al. (2009)
ANNEX E. FIBRE PELLETS USED AS FERTILISER – Life Cycle Inventory Data
Not included here but in Wesnæs et al. (2009)
Annex F. Biogas production with pig slurry and fibre fraction from a mechanical-chemical separation– Life Cycle Inventory data
Processes F.2 to F.7: Raw slurry from which the fibre fraction origins: production, separation and fate of the liquid fraction
Processes F.8 to F.10: Handling the fibre fraction from the farm to the biogas plant before biogas is produced
Processes F.11 to F.14: Handling the raw slurry input for biogas: from in-house storage to storage at the biogas plant.
Processes F.15 to F.18: Biogas production, co-generation of heat and power and avoided heat and electricity production
Process F.19: Separation of the degassed biomass mixture
Processes F.20 to F.23: fate of the degassed fibre fraction
Processes F.24 to F.27: fate of the degassed liquid fraction
Process F.28: Avoided production and application of mineral fertilizers and yield changes
Annex G. Biogas production with cow slurry and fibre fraction from a mechanical-chemical separation– Life Cycle Inventory data
Processes G.2 to G.7: Raw slurry from which the fibre fraction origins: production, separation and fate of the liquid fraction
Processes G.8 to G.10: Handling the fibre fraction from the farm to the biogas plant before biogas is produced
Processes G.11 to G.14: Handling the raw slurry input for biogas: from in-house storage to storage at the biogas plant.
Processes G.15 to G.18: Biogas production, co-generation of heat and power and avoided heat and electricity production
Process G.19: Separation of the degassed biomass mixture
Processes G.20 to G.23: fate of the degassed fibre fraction
Processes G.24 to G.27: fate of the degassed liquid fraction
Process G.28: Avoided production and application of mineral fertilizers and yield changes
Annex H. Fibre fraction from mechanical separation for biogas production – Life Cycle Inventory data
Processes H.2 to H.7: Raw slurry from which the fibre fraction origins: production, separation and fate of the liquid fraction
Processes H.8 to H.10: Handling the fibre fraction from the farm to the biogas plant before biogas is produced
Processes H.11 to H.14: Handling the raw slurry input for biogas: from in-house storage to storage at the biogas plant.
Processes H.15 to H.18: Biogas production, co-generation of heat and power and avoided heat and electricity production
Processes H.19 to H.22: Fate of the degassed biomass
Process H.23: Avoided production and application of mineral fertilizers and yield changes
Annex I. Fibre pellets from mechanical separation for biogas production – Life Cycle Inventory data
Processes I.2 to I.7: Raw slurry from which the fibre pellets origins: production, separation and fate of the liquid fraction
Processes I.8 to I.10: Handling the fibre pellets from the farm to the biogas plant before biogas is produced
Processes I.11 to I.14: Handling the raw slurry input for biogas: from in-house storage to storage at the biogas plant.
Processes I.15 to I.18: Biogas production, co-generation of heat and power and avoided heat and electricity production
Processes I.19 to I.22: Fate of the degassed biomass
Process I.23 to I.25: Fate of the ash from the Samson Bimatech Energy Plant
Process I.26: Avoided production and application of mineral fertilizers and yield changes
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Version 1.0 August 2010, © Danish Environmental Protection Agency
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