1 / 10

Implementation of Biogas- production into the German agricultural emission inventory

Implementation of Biogas- production into the German agricultural emission inventory. Sebastian Wulf (KTBL), Hans-Dieter Haenel (TI). TFEIP – Agriculture and Nature Panel 13th May 2014, Ghent. Reasons for I mplementation. IPCC requirements for greenhouse gases :.

kiley
Download Presentation

Implementation of Biogas- production into the German agricultural emission inventory

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Implementation of Biogas-productionintothe German agriculturalemissioninventory Sebastian Wulf (KTBL), Hans-Dieter Haenel (TI) TFEIP – Agricultureand Nature Panel 13th May 2014, Ghent

  2. ReasonsforImplementation • IPCC requirementsforgreenhousegases: • IPCC 2000 guidelines: anaerobicdigestionasmanagementoptionfordung and urine in liquid manure/slurry-systems • IPCC 2006 guidelines: norestrictiontoslurrysystems Submission 2013 (for 2011): Implementation of AD forslurryand solid manure (compliancewith IPCC 2006) • Digestatemanagement relevant sourceof NH3-emissions in Germany • Emissionsfromdigestates not accounted so far. (xx kt NH3) Submission 2015 (for 2013): Improvedmethodforslurry, solid manureandenergycrops. 1

  3. System boundariesforagriculturalinventory sewagetreatment gas capture landfills CHP electricity biowaste gas processing biomethane energycrops biogasproduction slurry, solid manure Flare digestatestorage / processing Agriculture application fertilizer Wastetreatment 2 Energy

  4. Calculationprocedure Requirement: Calculationofimpliedemissionfactorsforanimalcategories,includingmanuretreatmentby AD Category 1 Category 2 Category 3.. Energycrops X dig X dig X dig • Pre-storage • slurry: N-emissionsnegligible(short, covered) • solid manure: emissionsof NH3, N2O, NO andN2 Pre-storage - Negligible (low pH, captureofleachate) • Digestion process • No relevant N-emissions • N-transformation (Norg -> TAN) • Storage • emissionfactor(gas tightstorage / open tank withcrust) • Application • emissionfactors (different applicationtechniquesandincorporationtimes) 3

  5. Emissionsfromstorageofdigestates ENH3-N annual NH3-N emissions [kg a-1NH3-N] TANdigdaily amount of TAN in manure entering the digester [kg d-1] fTANshare of organic N entering the digester that is mineralized to TAN [kg kg-1] Norg, digamount of Norg contained in manure entering the digester [in kg d-1] αtime units conversion factor [365 d a-1] Xgtsshare (fraction) of gastight storage of digestion residues[kg kg-1] EFNH3-N NH3-N emission factor for the storage of digestates 4

  6. Emissionsfromapplicationofdigestates ENH3-N, annual NH3-N emissions [kg a-1 NH3-N] TANdig daily amount of TAN contained in manure entering the digester [in kg d-1] fTAN share of organic N entering the digester that is mineralized to TAN [kg kg-1] Norg, dig daily amount of organic N in manure entering the digester [in kg d-1] α time units conversion factor (365 d a-1) ENH3-N, dig annual NH3-N emissions from storage of digestion residues [kg a-1 NH3-N] EN*, dig, annual non-ammonia N emissions from storage of digestion residues [in kg a-1 N] EFNH3-N, dig, spreading, j NH3-N emission factor for spreading technique j [kg NH3-N per kg TAN] xspreading, j relative share of digested slurry spreaded with technique j 5

  7. Emission factorsandactivitydataused General assumptions: • Negligible NH3-emissions frompre-storageofslurryandenergycrops • NH3-emissions fromfermenterand gas-tightdigestatestorage = 0 Emission factoratpre-storage (only solid manure): • EFNH3-N, pre-storage= 0,1 x EFNH3-N, storage manure • EFN2O-N, pre-storage= 0,1 x EFN2O, storage manure • EFNO-N, pre-storage = 0,1 x EFNO, storage manure • EFN2-N, pre-storage = 0,1 x EFN2, storage manure EFstorage manure of respective solid manure from EMEP-Guidebook Assumption (nodataavailable) – maybediscussed N entering AD: • Xdig: canonlybedifferentiatedforcattle/pigs/poultry (basisfederalstate) For sub-categories (e.g. dairycows, calves, heifers, beefcattle) same Xdigis assumed 6

  8. Emission factorsandactivitydataused N transformation in fermenter (fTAN) • Slurries: Survey showed, thatmean TAN risesfrom 45% to 62% fTAN= 0.32 • Energycrops: mean TAN ofdigestatesfromenergycrops: 56 % ofNtot . fTAN= 0.56 Share ofcoveredstorage (Xgts) • Xgtsfor different plant sizesfromannual non-officialsurvey (DBFZ) • Plant sizedistributionfor different statessuppliedbyFederal Network Agency Xgtsvariesfor different federalstates 7

  9. Emission factorsandactivitydataused Emission factorsatstorage • EFNH3-N, storage: - as EF forstorageofundigestedslurrywithcrust- for gas-tightstorage EF = 0 • EFN2O, storage: gas-tight storage = 0, open storage = undigested slurry with crust • EFNO, storage = 0,1 x EFN2O, storage • EFN2, storage = 3 x EFN2O, storage asforstorageofundigestedslurry in German inventory Techniquesusedforapplication (xspreading) • Share of different applicationtechniquestakenfromofficialstatisticalsurvey (2010), specificfordigestates Emission factorforapplication • As nodataavailable, assumedtobethe same asforcattleslurryfortherespectiveapplicationtechniques

  10. Status andfutureneeds • Calculationproceduresarenowbeingimplementedin themodel • Sourcesandqualityofactivitydataneedtobereviewedespeciallyforshareofslurryandenergycropsentering AD (Xdig ) • Analogyofemissionfactorsfordigestatestorageandapplicationwithslurriesneedstobechecked Mightbenecessarytodevelopspecific EF fordigestates 8

More Related