Cleaning Pet Urine Odor on Concrete?

I'd like to ask if there is any way to remove odours from concrete caused by mink. Three years ago minks were placed in a semi finished building. After that, there is a terrible smell in all the building. Maybe due to their feed or urine. I really don't know. Can you help me counter this problem? Is there any special chemical product I can use to wash the concrete? Please help me.

By ANASTASIA from Greece