Process and system for degrading a chemical compound in a liquid stream

A process for the degradation of a chemical compound in a liquid stream, the process comprising:

• providing a pump fluidically connected in series with a treatment chamber comprising a mixer, and a reagent injector between the pump and the treatment chamber;
• introducing the liquid stream to an inlet of the pump;
• operating the pump to direct the liquid stream to an inlet of the treatment chamber to produce a pressure increase between the pump inlet and the treatment chamber of from 0.1 bar to 10 bar;
• introducing a degradation reagent into the liquid stream through the injector at a pressure greater than or equal to the pressure between the pump inlet and the treatment chamber;
• and
• operating the mixer to mix the degradation reagent in the liquid stream at a mixing intensity, namely a mixing power input per volume, wherein the mixing power input is the power of the mixer and the volume is the volume of the treatment chamber, in a range of from 0.7 W/L to 700 W/L to intentionally create physical and chemical conditions required to simultaneously enhance the mass transfer and the degradation of one or more contaminants present in the liquid stream.