In my cursory search on the matter (and comment a few moments ago to another reply), ethanol production was my first thought when dealing with the excess lactos

In my cursory search on the matter (and comment a few moments ago to another reply), ethanol production was my first thought when dealing with the excess lactose. It seems that there are a few cooperatives that own a facility in California & Minnesota. I am still unsure of the difference between "sweet" whey & "acid" whey, I believe that they should be able to convert the lactose into a useable ethanol.