How can I make my Tramp Oil Remover better?

[kunalv]

A quick question or two. Is the tank you are referring to under the machine, combined with the chip conveyor, or do you have a remote tank? Machine sumps are quite shallow and that may affect your choices. Belt and disc skimmers seem to be very effective - where I worked we used belts. Most systems work best when the coolant can be static, and are surprisingly effective.
I had thought of trying a system like a swimming pool leaf remover, but the tank agitation levels we had would have swamped the system with coolant rather than pulling oil.

Yes the tank is under the machine. We have a belt skimmer which does not function as well as we would have liked, hence we developed a coalescer in-house.

Odor. Almost certainly the coolant has bacteria in it. Once the amount of biocide in the coolant has been consumed then the amount added by topping up coolant will be insufficient. The only cure is then a coolant flush with a special purpose machine cleaner that uses disinfectant and detergents to loosen sludge build up, followed by a mechanical clean. You can top up biocide content in the coolant but only for a very short time. It must be compatible with the coolant chemistry too. Bacteria destroy coolant very quickly.

Agreed. But I do not want to add any Biocide chemicals as my coolant supplier has advised against it. What are the ways to kill bacteria present in the tank? Ozone is too expensive. UV Light? Not sure about the life of these UV Electrodes. Aeration? How long do you need to 'oxygenate' the coolant in order to introduce adequate oxygen?