Method for reprocessing wastewater and water treatment machine

A method for reprocessing an industrial process wastewater that contains acetic acid and/or peracetic acid, comprising:

• Introducing the wastewater into a heat-exchange process that uses a heat-exchange medium to heat the wastewater to a vaporization temperature between 60° C. and the boiling point of the wastewater;
• partially vaporizing and then condensing the wastewater while irradiating the wastewater with ultraviolet radiation in liquid phase and/or gas phase during the vaporizing and condensing, as a result of which the acetic acid and/or peracetic acid is at least partially converted into H2O and a carbon oxide;
• and
• returning condensed purified wastewater to at least one industrial process.

A water treatment machine for reprocessing wastewater containing acetic acid and/or peracetic acid, comprising:

• a wastewater collecting device;
• a heat exchanger, coupled to the wastewater collecting device, heating the wastewater to a vaporization temperature between 60° C. and the boiling point of the wastewater;
• an evaporation device, coupled to the heat exchanger, providing partial vaporization of the heated wastewater;
• a condenser, coupled to the evaporation device, condensing vaporized wastewater;
• and
• an ultraviolet radiation device irradiating heated wastewater in liquid phase and/or gas phase, thereby converting the acetic acid and/or peracetic acid into H2O and a carbon oxide.