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Food processing (phosphoric acid used in a preserative)

I  will be visiting a food processing company to
discuss pollution prevention opportunities.
This company uses phosphoric acid in a
proprietary food preservative used in flour and
corn tortilla production.  There are no effluent
waste streams associated with this chemical.
Phosphoric acid is also present in a cleansing
material used in sanitation activities for both flour
and corn tortilla production.

Sodium hydroxide is also present in several
cleansing materials.

Has anyone come across any reference P2
materials on the food precessing industry that
may be helpful for this facility.  Thank you in
advance for you help.

Bill Quinn
Pollution Prevention Unit
Arizona DEQ