title: Lifecycle Greenhouse Gas Analysis of an Anaerobic Codigestion Facility Processing Dairy Manure and Industrial Food Waste.
abstract: Anaerobic codigestion (AcoD) can address food waste disposal and manure management issues while delivering clean, renewable energy. Quantifying greenhouse gas (GHG) emissions due to implementation of AcoD is important to achieve this goal. A lifecycle analysis was performed on the basis of data from an on-farm AcoD in New York, resulting in a 71% reduction in GHG, or net reduction of 37.5 kg CO2e/t influent relative to conventional treatment of manure and food waste. Displacement of grid electricity provided the largest reduction, followed by avoidance of alternative food waste disposal options and reduced impacts associated with storage of digestate vs undigested manure. These reductions offset digester emissions and the net increase in emissions associated with land application in the AcoD case relative to the reference case. Sensitivity analysis showed that using feedstock diverted from high impact disposal pathways, control of digester emissions, and managing digestate storage emissions were opportunities to improve the AcoD GHG benefits. Regional and parametrized emissions factors for the storage emissions and land application phases would reduce uncertainty.
authors.affiliation: Golisano Institute for Sustainability, Rochester Institute of Technology , Rochester, New York 14623, United States.
authors.forename: Jacqueline H
authors.initials: JH
authors.lastname: Ebner
authors.affiliation: PRO-DAIRY Program, Biological and Environmental Engineering, Cornell University , Ithaca, New York 14853, United States.
authors.forename: Rodrigo A
authors.initials: RA
authors.lastname: Labatut
authors.affiliation: Golisano Institute for Sustainability, Rochester Institute of Technology , Rochester, New York 14623, United States.
authors.forename: Matthew J
authors.initials: MJ
authors.lastname: Rankin
authors.affiliation: PRO-DAIRY Program, Biological and Environmental Engineering, Cornell University , Ithaca, New York 14853, United States.
authors.forename: Jennifer L
authors.initials: JL
authors.lastname: Pronto
authors.affiliation: PRO-DAIRY Program, Biological and Environmental Engineering, Cornell University , Ithaca, New York 14853, United States.
authors.forename: Curt A
authors.initials: CA
authors.lastname: Gooch
authors.affiliation: Golisano Institute for Sustainability, Rochester Institute of Technology , Rochester, New York 14623, United States.|New York State Pollution Prevention Institute, Rochester Institute of Technology , Rochester, New York 14623, United States.
authors.forename: Anahita A
authors.initials: AA
authors.lastname: Williamson
authors.affiliation: Golisano Institute for Sustainability, Rochester Institute of Technology , Rochester, New York 14623, United States.|Center for Sustainable Mobility, Rochester Institute of Technology , Rochester, New York 14623, United States.
authors.forename: Thomas A
authors.initials: TA
authors.lastname: Trabold
mesh_terms: D000393:Air Pollutants / Q000032:analysis; D000693:Anaerobiosis; D057965:Carbon Sequestration; D057231:Climate Change; D003612:Dairying; D005308:Fertilizers; D005502:Food; D005740:Gases / Q000032:analysis*; D017752:Greenhouse Effect; D007220:Industrial Waste / Q000032:analysis*; D008372:Manure / Q000032:analysis*; D008697:Methane / Q000032:analysis; D009518:New York; D012037:Refuse Disposal / Q000379:methods*
chemical_list: D000393:Air Pollutants; D005308:Fertilizers; D005740:Gases; D007220:Industrial Waste; D008372:Manure; D008697:Methane