Co2 Gas food safety requirements

Dears,

Kindly we have a process of burning lime CaCO3 resulting  CO2 gas and CaO.

CO2 gas added to the process (for beet sugar Juice clarification).

What is the food safety requirements needed to have a safe CO2 gas to the process like filterers, washing system,........?

A couple things to consider.

1) carbon treatment to remove taste/odor   

2) bubble the CO2 thru water and oxidising solution . Water will remove any impurities, oxidising solution (typicall KMnO4 ) removes oxygen. 

3) final filtration, be it paper, cotton or some cartridge type will remove any fines, any suspended matter and a final barrier

You have to use a multi barrier approach. Item 1 n 3 will also help remove any oil. This is the very traditional approach.

Nowadays  most carbon dioixde supplier can supplier very low oxygen and quality gas (odor, etc). Depends on your vendor. Actually your CO2 vendor is in a better position to recommend.

Dear Midooo,

From the human safety point of view, I like to add that CO2 is very dangerous in the case of a leakage, as it is heavier as air. Depending on the context, leakage detectors are necessary in your factory.

Kind regards,

Gerard Heerkens

Thanks Tham

Dear Gerard,

It's a closed system starting by gas and then ending by salts precipitated as CaCo3

No risk on human as also it injected with  little quantity.

Thanks Both 

Thanks Tham

Dear Gerard,

It's a closed system starting by gas and then ending by salts precipitated as CaCo3

No risk on human as also it injected with  little quantity.

Thanks Both