In this application, mine water is used to drive the trompe and the compressed air that is generated is used to oxygenate the mine water and to drive off excess dissolved carbon dioxide that may be present thus raising the pH of the water being treated.
For this process, mine water serves as the driving force for a pump, while the compressed air produced powers both the oxygenation of the water and the removal of any excess dissolved carbon dioxide that might be present, leading to an increase in the water's pH.