Metodo y sistema para tratar agua residual con ozono que comprende generar una primera corriente de gas con al menos un 4% de ozono por peso y al menos 50% de oxigeno, separar al menos una parte del ozono, formar una segunda corriente de gas, tratar el agua residual con digestion anaerobica, y comunicar la segunda corriente con al menos una parte del agua residual.

摘要

A method comprising:
(a) generating a first gas stream comprising at least 4% ozone by weight and at least 50% oxygen by weight;
(b) separating at least a portion of the ozone from the first gas stream;
(c) forming a second gas stream comprising at least a portion of the ozone that was separated from the first gas stream in step (b), the second gas stream having no more than 18% oxygen by weight;
(d) treating wastewater using an anaerobic digestion process; and
(e) contacting the second gas stream with at least a portion of the wastewater either before the wastewater is treated using anaerobic digestion process and/or while the wastewater is treated using the anaerobic digestion process.