life cycle assessment in the rendering industry · 2012. 12. 11. · life cycle assessment in the...
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Life Cycle Assessment in the Rendering Industry
Angel RamirezPostgraduate ResearcherHarper Adams University College (HAUC)
Dr. Robert Wilkinson, Director of Studies (HAUC)Dr. Andrea Humphries, Supervisor (HAUC)Mr. Stephen Woodgate, Supervisor (Technical Director EFPRA)
76th Annual ConventionNATIONAL RENDERERS ASSOCIATION, USSan Francisco CA, US20 October 2009
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Angel RamirezPaul Foxcroft PhD Scholar 2009-2012
Academic Background• (MSc) Industrial Ecology
2007 (Chalmers University of Technology, Gothenburg,Sweden)
• Mechanical Engineering 2004 (Escuela Superior Politecnica del Litoral(ESPOL), Guayaquil, Ecuador)
Experience• Life Cycle Assessment of
the Ecuadorian shrimp aquaculture at ESPOL
• Research and support to projects related to energy and environment at ESPOL
• Environmental consultancy, air emissions and noise engineering
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2,000 students350 staffT/O £18m
Specialist HE providerStrong business linksLand & environment
Rural community Central Government
Regional AgenciesRural/Urban ‘bridge’
Research Business
International
OurInfluence
OurPartnerships
TheInstitution
OurFocus
Harper Adams University College
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Harper Adams University College
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The Paul Foxcroft Scholarship• Awarded to a Postgraduate Researcher
in the area of maximising the utilisation of animal by-products.
• In this case: Carbon Footprint for the Rendering Industry
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Overview
1. Objectives of the project2. Schedule of the project3. Methods4. Information and data5. Preliminary Results6. Discussion7. Conclusions
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Objectives of the Research Project
1. To develop and validate a transparent energy and greenhouse gas life cycle assessment toolkit for the UK rendering industry
2. To help the UK rendering industry to identify green house gas emissions reduction or offset opportunities
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Initial Questions
• Can rendered products be considered as renewable energy sources?
• Can carbon and nitrogen be stored in rendered products?
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Work Schedule
• Phase 1 (Jan 2009 – Jan 2010)– Energy and Green house gas data of as many UK
rendering plants as possible (gate-to-gate approach)• So far 5 out of 20 plants
• Phase 2 – whole life cycle including livestock
production, slaughtering, and use or consumption (cradle to grave approach)
• Phase 3– Comparison with alternatives
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Carbon footprint
• Definition: “The total set of greenhouse gas emissions caused by an individual or organisation, event or product. It should be expressed in carbon dioxide equivalent (CO2e).” The Carbon Trust
• In industry– Organisation (Greenhouse Protocol)– Product (The Product Approach)
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The Product Approach
• Standards– Life cycle assessment LCA (ISO 14040: 2006 – ISO 14044:
2006)– Life cycle greenhouse gas emission of goods and services (BS
PAS 2050:2008)
Raw Materials
Manufacturing
Distribution / Retail
Consumer use
Disposal / Recycling
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Data for Energy and Greenhouse gas LCA
•Type and quantity of all inputs and outputs for each process-Material inputs-Product outputs-Co-products-Waste
Inputs / outputs Energy used Direct gas
emissionsDistribution /
Transport
•Type , source and quantity of all energy used
•Electricity•Other fuels
•Type and quantity of direct GHG emissions
Per functional unit (product or service unit)
•Vehicle type, average distance for all transport•%full or shared with other products•% full on return
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Category 2 Category 3
Category 1
Animal By-ProductsIn the UK Categorised…..
According to
“Risk” to Animals and Humans
EU legislation
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Category 1
Category 1 Highest RiskContains TSE Animals ~ BSE & scrapie
Specified Risk Materials [SRM]
e.g. Skull/ brain, spinal cord, cattle intestines etc
or dangerous contaminants
e.g. Dioxins and PcB’s
Uses.. After Rendering
Cement manufacture
Energy… Heat ~ Power
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Category 2
Category 2
Fallen Stock ~ animals died on farm
or rejected as unfit for human consumption
Uses….. Biogas or Composting after pressure processing
Uses.. After RenderingEnergy… Heat ~ PowerOleochemical “splitting”Organic fertiliser
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Category 3
Category 3“Fit for Human
Consumption”
Veterinary inspection
Uses….. Biogas or Composting
Uses.. After RenderingEnergy… Heat ~ Power, Oleochemical “splitting, Organic fertiliser.
Pet food & Animal Feed*
* Approved in principleNot back to same speciesNeeds final approval
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Allocation within LCA• Product: any goods or service• Co-product: any of two or more products coming from the same unit
process or product system (economic value for holder)• Waste: substances or objects which the holder intends or is required
to dispose of (no or negative economic value for holder)• Allocation: partitioning the input or output flows of a process or a
product system between the products system under study and one or more other product systems
ProcessProduct
Co-Product
Wastes
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How to allocate ?
Animal Production
Meat industry
Milk
Meat
Skins
Offal and bone
Fallen stock
Emissions to air (CH4, N2O, others)
WastesLiquid discharges
Inputs- energy- feeds- fertilizer- others
Allocation (%)ABP meat
mass 30 - 50 70 - 50market price < 5 > 95“Waste” 0 100
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Life cycle of rendered products (Category 1)
Animal production /
meat industry
Rendering Energy Recovery
Disposal / Recycling
cradle-to-grave
gate-to-gate
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Life cycle of rendered products (Category 3)
Raw Materials:
Animal production /
meat industry
Rendering Further processing
Consumer use
Disposal / Recycling
cradle-to-grave
cradle-to-gate
gate-to-gate
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How to allocate between fats and proteins?
Rendered Proteins
Rendered Fats
Offal and bone
Fallen stock
Emissions to air (CO2, CH4, N2O, others)
WastesLiquid discharges
Inputs- energy-others
Rendering
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Biogenic and Fossil Carbon
CO2 in theatmosphere
photosynthesis
Decaying plantsFossil Fuels
CO2 in decaying matter and waste
Respiration and decomposition
intake
years
Biogenic Carbon Cycle
Fossil CarbonIs not part of the natural carbon cycle
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Methodolgy
• Phase 1, Gate-to-gate approach (rendering process)
• 4 Plants in UK - 1 plant (cat 1)1 plant (cat 2)2 plants (cat 3)
• Energy• CO2 related to energy use (heat and electricity)• Aggregated yearly data for 3 years (2006, 2007, 2008)
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Methodology
• Plants classified based on yield of rendered fat & protein– High: 50 – 60 % (1 plant , cat 3 material, vacuum evaporator)– Low: 30 – 41 % (3 plants, rotodisc dryer)
• GHG emissions expressed - Per kg animal by product (ABP) (input to rendering)- Per kg dried rendered product (DRP) (output from rendering)- Per kg condensate
• Energy: kJ
• Global Warming Potential: kg CO2
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Constants used
• Natural Gas UK– Gross Calorific Value : 54 MJ/kg– Carbon content: 75% (FOSSIL)
• Tallow (rendered fats)– Gross Calorific Value : 39 MJ/kg– Carbon content: 75% (BIOGENIC)
• Electricity of UK– 0.53702 kg CO2 / kWh (5 years average by DEFRA 2008)
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Energy (kJ/kg)
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
ABP DRP condensate
low yieldhigh yield
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Partition of energy (kJ/kg DRP)
0100020003000400050006000700080009000
low yield high yield
Tallow HeatGas Heat (exc CHP)CHP Gas HeatCHP Gas electricityGrid electricity
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Fossil and biogenic CO2 (kg CO2/kg DRP)
0.00
0.20
0.40
0.60
low yield high yield
Tallow (biogenic)GasElectricity (Grid)
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Fossil CO2 (kg CO2/kg DRP)
0.00
0.10
0.20
0.30
0.40
0.50
0.60
fossil+biogenic fossil fossil+biogenic fossil
low yield high yield
tallowgaselectricity
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Example: Fossil CO2 (kg CO2/kg DRP)
0.0
0.5
0 20 40 60 80 100
% of fuel with 0 GWP
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Some Global Warming Potentials(kg CO2 / kg)
DRP (gate-to-gate)Preliminary, not to reference
0.1– 0.4
Animal Production(cradle-to-gate)
(Williams AG et al, 2006)beef pig poultry16 6.4 4.6
Soybean meal (cradle-to-gate)Argentina -Rotterdam 0.726
Daalgard R et al ,2008
In Argentina 0.3 - 0.7
Cited studies in Panichelli L
et al, 2008
Palm oil (South Asia to Europe)(cradle-to-gate)
(Reijnders L and Huijbregts MAJ, 2006)2.8 – 19.7
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Fate of carbon (alternatives)
Alternative Final Destination of carbon (most likely)
Land spreading / dumping / Landfill *
Carbon Cycle
Anaerobic digestion to obtainbiogas
Carbon cycle but maybe offset of fossil fuels
Incineration or Co‐incinerationCarbon Cycle but maybe offset of fossil fuels
*Raw ABP are not allowed to be landfilled in EU
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Fate of carbon (rendered products)
Main uses Final Destination of carbon (most likely)
Animal feeds/ pet food Carbon Cycle
Fertilizers Carbon Cycle
Oleochemicals/soap Carbon Cycle or ??
Energy and fuelsCarbon Cycle but maybe offset of fossil fuels
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Conclusions• A life cycle perspective should be used when analysing
GHG emissions from the rendering industry.
• Appropriate allocation of GHG emissions between animal products, by products and rendered products is critical.
• Carbon in rendering products cannot be considered stored.
• Life cycle comparisons with alternative to rendered products are required.
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Thank you
Angel [email protected]
Special acknowledgements toThe Fats and Proteins Research Foundation, Inc.