Here's a suggested supplier for the pail washing system you desire....
SWISH Maintenance, USA 1-800-649-4149, Mr. John Ambler.
They offer a device called an "INDO" machine, and off-the shelf or
custom aqueous solutions to meet specific needs. Amazing what a little
hot water and pressure will do !
By the way, this company sells their solutions in 5-gallon plastic
containers with a unique plastic label,ultimately to lend itself to
return and regrind (pail and label) for injection molding as another
Reuse and recycling at it's best !