As an Ozone generator and reclaim system manufacturer, I would recommend a 16 gm/hr Ozone Generator for the tanking you discribed. It requires proper mixing and distribution to the tanks to be effective and not corrosive to your wash equipment.
It's very important that Ozone be applied properly, too little or too much can create problems. Do it right and the odor will be gone overnight.
I would suggest a turnkey ozone system with pump, timer, injector system and controls.