Sustainable biofuels information
Biofuels vary in the way they are produced with differing impacts on climate change, the environment and people. To provide New Zealanders with confidence that they are using sustainable biofuels, EECA have established a framework which allows biodiesel producers and retailers to report on the environmental credentials of their products.
|Biofuel seller||Blend/Fuel||Biofuel feedstock||Feedstock origin||Greenhouse gas emissions compared to petrol / diesel|
|Anchor Ethanol Ltd||100% bioethanol||Whey||New Zealand||20% reduction on an energy equivalent basis
|Green Fuels NZ||100% biodiesel (Biogold™NZ100)||Used cooking oil
||New Zealand||Greater than 80% reduction|
|Green Fuels NZ||5% biodiesel blend (Biogold™NZ5)||Used cooking oil
||New Zealand||4% reduction|
|Gull New Zealand||Up to 5% biodiesel (Gull Diesel Max)||Used cooking oil||New Zealand||4% reduction|
|Gull New Zealand||up to 10% bioethanol (Gull Force 10)||Whey
|Gull New Zealand||85% bioethanol (E85) (Gull Force Pro)||Whey
The information in the table is calculated by comparing the emissions from the biofuel, with the emissions of mineral diesel or petrol. The lifecycle emissions for the biofuel is calculated using greenhouse emissions factors that have been derived for EECA plus from data provided to EECA by biofuel producers and retailers. These have been independently checked. The biofuel emissions value is compared against that for the use of mineral diesel or petrol.
Carbon dioxide from the combustion of the biofuel is not counted in this calculation. This is because this combustion-derived carbon dioxide is effectively cancelled out by the carbon dioxide that was recently absorbed from the atmosphere by the base feedstock of the biofuel, for example by the plants from which the oils are derived in the case of biodiesel. Greenhouse gases emitted during farming, manufacture and transportation of the biofuel are counted.
The greenhouse gas emissions factors for biodiesel and bioethanol are based on the following URS reports.
Fuel company statements
Anchor Ethanol Ltd
Anchor Ethanol sustainably produces bioethanol from a yeast fermentation of lactose contained in acid casein serum or permeate, which are by-products of milk processing. The steam used in distillation is generated from biogas or is produced during generation of electricity. Acid whey permeates and serum have a high Chemical Oxygen Demand (COD) which makes them difficult to dispose of to land or to dispose of via biological wastewater treatment plants - most of the COD is converted to bioethanol during the fermentation process. The residues from the fermentation and distillation processes are used as a fertiliser on adjacent arable pasture where their valuable nutrient components, nitrogen, potassium and phosphorus are used to grow grass with reduced use of mineral fertilisers.
Green Fuels NZ
Green Fuels NZ biodiesel is produced from used cooking oil, collected in New Zealand,graded for optimum use, and canola oil (oilseed rape) from rapeseed grown in New Zealand.
Gull New Zealand
Gull uses whey-derived bioethanol supplied by Anchor Ethanol. Anchor Ethanol developed their process as a way to better manage the otherwise waste whey from dairy processing.