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PRINCIPLE 3. Manage input, production and processing efficiencies to enhance sustainability

3.1   >   3.2  
3.1
To monitor production and process efficiency; to measure the impacts of production and processing so that improvements are made over time.
  
Indicator
Processing
& Milling
Agriculture
Verifier
Standard
Notes
Total raw materials used per kg product
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kg/kg

< 11 if no ethanol produced; <20 for full ethanol production
Sustainability measure includes cane as major raw material as well as material amounts of chemicals, fuels etc. Standard required varies between 2 limits depending on proportions of sugar and ethanol produced. If a mill exports power, any fuels purchased will not be recorded as raw materials consumed.
Sugarcane yield
 
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tc/ha harvested/y

See Appendix 1
Standard values depend on whether rain-fed or irrigated. Value for reporting period or 5 year rolling average can be used.
Working hours lost as percent of total hours worked
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%
<5
This represents working hours lost through absence (all unplanned causes - strikes, sickness, absenteeism etc. but not holiday, legal time off such as maternity leave, or training)
Mill overall time efficiency
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%
>75
Processing time as a percentage of total time. Value for reporting period or 5 year rolling average can be used.
Factory Performance Index
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%
>90
Used if sugar and not ethanol is produced. Ratio of actual sugar recovery to theoretical recovery of sugar from cane. In rare cases where high grade molsses is exported for fermentation, industrial efficiency can be used instead.
Industrial Efficiency
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%
>75
Used if ethanol only or sugar and ethanol are produced in the same mill. It is the ratio of (sugar+equivalent ethanol+eq. sucrose in molasses)/(sucrose in cane+RS in cane converted to sucrose+RS in molasses converted to sucrose+yeast eq to sucrose), expressed as a %.
  Key To Indicators:
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3.2
To monitor global warming emissions with a view to minimizing climate change impacts.
 
Indicator
Processing
& Milling
Agriculture
Verifier
Standard
Notes
Global warming burden per unit mass product
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t CO2eq/t sugar
Total <0.4
Only used if sugar is being produced. Field-to-gate emissions. Environmental Burden is t carbon dioxide equivalent.
 
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g CO2eq/MJ fuel
Total <24
Only used if ethanol is produced. Environmental Burden is g carbon dioxide equivalent.
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