Wet oxidizer for the treatment of anaerobic gases in wastewater treatment plants for odor removal and disinfection, as well as behind biological and denitrification stages. Suitable for the removal of mercaptans in fermenters and anaerobic pumping stations. Optionally equipped with an AOP system for the splitting of aromatics. The system has a self-priming water jet to avoid the use of a fan and reduce energy consumption. The oxidation principle does not require any chemicals and is completely sustainable.