Part Part 2 - Future Made in Australia (Guarantee of Origin) Methodology Determination 2025 - Scope 3 emission factor supplements for advanced water treatment processes

Part 2—Scope 3 emission factor supplements for advanced water treatment processes

Note: See paragraph 17(2)(b) and subsection 17(4).

Column 1	Column 2	Column 3	Column 4
Item	Advanced treatment process	Water quality post-treatment process	Emission factor in kg of CO2-e per kg of water
1	Ultrapure membrane process	Water for electrolyser feed-water qualityConductivity less than 0.1 micro-Siemens per centimetre (µS/cm) and total silica less than 0.01 milligrams per litre (mg/L)	0.001836
2	Ultrapure thermal process	Water for electrolyser feed-water qualityConductivity less than 0.1 µS/cm and total silica less than 0.01 mg/L	0.036991
3	Demineralised or deionised via electro-deionisation	Boiler feedwater for steam generation qualityConductivity less than 1 µS/cm, total silica less than 0.02 mg/L and less than 0.08 Total Organic Carbon	0.001741
4	Water softening by ion exchange	Water hardness less than 0.02 mmol/L	0.000335
5	Ultrafiltered membrane process	Particulate matter larger than 0.01 µm removed and turbidity below 0.1 Nephelometric Turbidity Units	0.004356
6	Filtered clarifier	Total suspended solids reduced to below 1 mg/L or turbidity less than 10 Nephelometric Turbidity Units	0.000509