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At GrainSpan, sustainability is at the core of our ethanol production process. Corn and rice milling processes release significant amounts of CO2 as a by-product. Instead of releasing this CO2 into the atmosphere, we capture and store it using advanced technology.

Carbonation is the process by which carbon dioxide (CO2) gets dissolved under high pressure in a liquid. The dissolved CO2 gives the carbonated drinks their characteristic effervescent nature or the fizzy effect.

We process the captured CO2 to meet industry standards and supply it to companies manufacturing carbonated soft drinks and other fizzy beverages. We also supply CO2 to companies that manufacture dry ice. This capture-and-storage process reduces our environmental impact apart from supporting a circular economy.

GrainSpan is committed to transforming by-products into valuable resources, ensuring our operations contribute to a sustainable future.

Component Concentration
Assay 99.9% v/v min
Moisture 50 ppm v/v max (20 ppm w/w max)
Acidity To pass JECFA test
Ammonia 2.5 ppm v/v max
Oxygen 30 ppm v/v max
Oxides of nitrogen (NO/NO2) 2.5 ppm v/v max each
Non-volatile residues (particulates) 10 ppm w/w max
Non-volatile organic residue (oil and grease) 5 ppm w/w max
Phosphene ≤0.3 ppm v/v
Total volatile hydrocarbons (calculated as methane) 50 ppm v/v max of which 20 ppm v/v max non-methane hydrocarbons
Acetaldehyde 0.2 ppm v/v max
Benzene 0.02 ppm v/v max
Carbon monoxide 10 ppm v/v max
Methanol 10 ppm v/v max
Hydrogen cyanide 0.5 ppm v/v max
Total sulphur (as sulphur) 0.1 ppm v/v max
Taste and odour in water No foreign taste or odour
1

State-of-the-art processes for capture, storage and purification

2

Free from any contaminants and toxic substances

3

Free from unpleasant odour and taste

4

Meets all criteria for food regulations and compliances