This tool calculates and assesses carbon footprint of an organization in the rendering industry

Raw Materials Consumed
Insert ton/yr estimate for each type of product. Total will be calculated.    
Replace default composition estimates with more accurate values if known
(See Note 1) 		     
Type ton/yr % fat % protein % water        
Steer offal and bone      
Cow offal and bone      
Calf offal and bone      
Hog offal and bone      
Sheep offal and bone      
Poultry offal      
Poultry feathers      
Whole cattle      
Whole hogs      
Whole sheep      
Whole poultry      
Raw grease        
Blood      
Other (placeholder)
     
TOTAL      
Transportation of Raw Materials
Replace default estimates with more accurate values if known.    
  ton/yr avg ton/load avg miles/load
each way 		fuel economy
miles/gal 		   
Integrated, no shipping --- --- ---    
Received by truck    
Total raw materials Should add up to total raw materials above.    
Transportation of Employees
Replace default estimates with more accurate values if known.    
Total no. of employees all shifts    
Avg days/yr worked    
Avg miles/day each way      
Avg employees/vehicle      
Avg fuel efficiency, mpg      
     
Process fuel burned & Power purchased
Estimate annual use of each fuel and electricity in units shown.

Weight % carbon and % generation of electricity are default values that can be changed if better data are available. Btu/unit is listed only to help the user estimate fuel use in the units required. It is not used in the carbon footprint calculations. 		   
Replace estimates with more accurate values if known.    
Distribution of fuel source for electricity generation is available by region at    
http://www.epa.gov/cleanenergy/energy-resources/egrid/faq.html    
Type annual use Btu/unit (LHV) wt. % carbon      
Natural gas (cubic ft) 950 cf/100=therm    
No. 2 oil (gal) 135,000      
No. 6 oil (gal) 145,000      
Grease (lb) 16,000 < 1% water    
Animal fat (lb) 17,000      
Other fuel (lb)   (See Note 2)    
Electricity (kWh) % generation lb CO2/kwh      
coal        
natural gas        
oil        
renewables        
nuclear        
hydro        
other        
   
Wastewater Treatment
Default values are shown for the annual rate at which CBOD is sent to wastewater treatment and the percentage of total carbon entering WWT that is released as methane.

Replace with more accurate data or estimates if known (see instructions). 		   
CBOD into WWT ton/year    
% of C released as CH4 % (do NOT count CH4 captured and burned)    
About the Footprint Calculator
Acknowledgments  
Valuable input and advice were received from the NRA  
Working Group on Carbon Issues, especially David Meeker,  
Sergio Nates, David Kirstein, and Ross Hamilton.  
 
Calculator based on information published by C.H Gooding.  Data for the carbon footprint of rendering operations.  Journal of Industrial Ecology.  DOI:10.1111/j.1530-9290.2011.00430.x.
 
Click here to download
   
developed by  
Charles H. Gooding, Ph.D., P.E.  
Professor of Chemical Engineering  
Clemson University   Revised 012110  
NOTES (references and explanations)  
CO2 reduction ratio = CO2 emissions avoided by rendering/CO2 emitted due to rendering  

1. Default percentages are a composite of estimates from Dupps Company web pages. http://www.dupps.com/rawmat.html and http://dupps.com/rawyield.html 		 
2. Do not include methane captured from on-site anaerobic wastewater treatment.  

3. This estimate accounts for CO2 from aerobic secondary treatment of wastewater and
for CO2 and CO2 equivalents (as methane) from anaerobic treatment. 		 
4. The Greenhouse Gas Protocol (ghgprotocol.com) defines the following (paraphrased):  
Scope 1 emissions include those resulting from company controlled sources  
Scope 2 emissions are those resulting from purchased energy.  
Scope 3 emissions are from sources not controlled directly by the company, such as  
employee commuting and travel and support activites of suppliers and contractors.  
   
 
Purchase of electricity: 4478
  • Fuel on site
  • Fat on site
  • Wastewater treatment
  • Purchase of electricity
  • Material transport
  • Employee commuting
  ton/yr    
CO2 equivalents in raw materials      
CO2 emissions due to burning purchased fuel on site (Scope 1)    
CO2 emissions due to burning grease and fat on site (Scope 1)    
CO2 emissions from wastewater treatment (Scope 1, note 3)    
CO2 emissions attributed to purchase of electricity (Scope 2)    
CO2 emissions due to raw material transport (Scope 3)    
CO2 emissions due to plant employee commuting (Scope 3)    
CO2 reduction ratio (Scope 1 emissions only)      
CO2 reduction ratio (Scope 1 and Scope 2 emissions)    
CO2 reduction ratio (Scopes 1, 2, and 3 emissions)    
Total Carbon Footprint :    
Product Output
Insert ton/yr estimate for each type of product. Total will be calculated.  
Replace default estimates of % carbon with more accurate values if known (See Note 1)  
Type ton/yr % carbon    
BFT (animal fat)    
Meat and bone meal    
Poultry byproduct meal    
Feather meal    
Pork meal    
Blood products    
Other (placeholder)    
TOTAL    
Transportation of Raw Materials to Plant
Replace default estimates with more accurate values if known.    
     
  ton/yr avg ton/load avg miles/load
each way 		fuel economy
miles/gal 		 
Integrated, no shipping 0 -- -- --  
Received by Truck  
Total raw materials (See Note 2)    
Transportation of Employees to Plant
Replace default estimates with more accurate values if known.    
Total no. of employees all shifts    
Avg days/yr worked    
Avg miles/day each way    
Avg employees/vehicle    
Avg fuel efficiency, mpg    
Process Fuel Burned and Electric Power Purchased
Estimate annual use of each fuel and electricity in units shown.    
Weight % carbon and % generation of electricity are default values that can be changed if better data are available. Btu/unit is listed only to help the user estimate fuel use in the units required. It is not used in the carbon footprint calculations.  
Replace estimates with more accurate values if known.    
Distribution of fuel source for electricity generation is available by region at  
http://www.epa.gov/cleanenergy/energy-resources/egrid/faq.html    
Type annual use Btu/unit (LHV) wt. % carbon    
Natural gas (cubic ft) 950 cf/100=therm  
No. 2 oil (gal) 135,000    
No. 6 oil (gal) 1,450,003    
Grease (lb) 16,000 < 1% water  
Animal fat (lb) 17,000    
Other fuel (lb)   (See Note 4)  
Electricity (kWh) % generation lb CO2/kwh    
coal      
natural gas      
oil      
renewables      
nuclear      
hydro      
other      
   
   
Wastewater Treatment
Default values are shown for the annual rate at which CBOD is sent to wastewater treatment  
and the percentage of total carbon entering WWT that is released as methane.  
Replace with more accurate data or estimates if known (see instructions).    
CBOD into WWT ton/year    
% of C released as CH4 % (do NOT count CH4 captured and burned)  
   
   
   
   
   
   
   
About the Footprint Calculator
Acknowledgments    
Valuable input and advice were received from the NRA    
Working Group on Carbon Issues, especially David Meeker,    
Sergio Nates, David Kirstein, and Ross Hamilton.    
 
Calculator based on information published by C.H Gooding.  Data for the carbon footprint of rendering operations.  Journal of Industrial Ecology.  DOI:10.1111/j.1530-9290.2011.00430.x.
 
Click here to download
   
developed by  
Charles H. Gooding, Ph.D., P.E.  
Professor of Chemical Engineering  
Clemson University   Revised 012110  
NOTES (sources and explanations)      
CO2 reduction ratio = CO2 emissions avoided by rendering/CO2 emitted due to rendering  
   
1. NRA, "Rendering and Its Role in Capturing Carbon Emissions," October 2008.  
2. Example assumes 41% of total raw material mass is converted to products.  
3. Do not include methane captured from on-site anaerobic wastewater treatment.  
4. This estimate accounts for CO2 from aerobic secondary treatment of wastewater  
and for CO2 and CO2 equivalents (as methane) from anaerobic treatment.  
5. The Greenhouse Gas Protocol (ghgprotocol.com) defines the following (paraphrased):  
Scope 1 emissions include those resulting from company controlled sources  
Scope 2 emissions are those resulting from purchased energy.    
Scope 3 emissions are from sources not controlled directly by the company, such as  
employee commuting and travel and support activites of suppliers and contractors.  
 
  • Fuel on site
  • Fat on site
  • Wastewater treatment
  • Purchase of electricity
  • Material transport
  • Employee commuting
  ton/yr  
CO2 equivalents in products    
CO2 emissions due to burning purchased fuel on site (Scope 1)  
CO2 emissions due to burning grease and fat on site (Scope 1)  
CO2 emissions from wastewater treatment (Scope 1, note 4)  
CO2 emissions attributed to purchase of electricity (Scope 2)  
CO2 emissions due to raw material transport (Scope 3)  
CO2 emissions due to plant employee commuting (Scope 3)  
CO2 reduction ratio (Scope 1 emissions only, (See Note 5)  
CO2 reduction ratio (Scope 1 and Scope 2 emissions)  
CO2 reduction ratio (Scopes 1, 2, and 3 emissions)  
Total Carbon Footprint :  
     
 
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