Oxygen refinery
An oxygen refinery was a facility employed the Moneans to split oxygen from water for the purposes of life support. They were integrated with desalination plants and were equipped with corrosion resistant alloys and variable density ballasts.

In 2375, the  determined that the Moneans' oxygen refineries were responsible for their water planetoid's loss of containment, by increasing the ocean density and putting more pressure on the field reactor at the planetoid's center. When the Monean bureaucracy was reticent to shut down the refineries, Tom Paris and Riga attempted to destroy them from the Flyer. ()

de:Sauerstoffraffinerie
Life support technology