Wastewater oxidation with hydrogen peroxide injected in the air-gap of a vessel

A system for the treatment of oxidizable contaminants in wastewater, the system comprising:

• a contaminant treatment vessel;
• a hydrogen peroxide supply unit comprising a hydrogen peroxide transfer line in fluid communication with the contaminant treatment vessel, wherein:
• the hydrogen peroxide transfer line comprises one or more hydrogen peroxide pumps, one or more ball valves, and one or more check valves;
• the hydrogen peroxide transfer line is in fluid communication with the contaminant treatment vessel at a hydrogen peroxide injection point, wherein the hydrogen peroxide injection point is positioned above a maximum wastewater fill level of the contaminant treatment vessel such that an air gap exists between the wastewater in the contaminant treatment vessel and the hydrogen peroxide injection point;
• a wastewater feed stream in fluid communication with the contaminant treatment vessel;
• and
• a contaminant treatment vessel effluent stream in fluid communication with the contaminant treatment vessel, the contaminant treatment vessel effluent stream comprising less oxidizable contaminants regardless of an initial concentration of oxidizable contaminants in the wastewater feed stream.