UV Disinfection Lamp to remove bacteria from Coolant?

Hello guys,

I am designing a Tramp Oil Coalescer and Sump Cleaner for one of my clients to clean the coolant sumps in their machine shop.

I am wondering if a UV Lamp can be fitted on my Tramp Oil Coalescer to remove bacteria. Since the coalescer basically pulls liquid from only the surface of the machine sump, will that be enough in removing all of the bacteria? Where do these germs generally reside in the sump? On the surface with the tramp oil or at the bottom with all the debris? or throughout the liquid...

Thanks,
KV