A method of cleaning or sanitizing or antimicrobial treatment of equipment that needs treatment using a solution of electrolytically generated chlorine oxyanions in an automated or single-step recirculation cleaning system, comprising: (a) producing in situ a solution of electrolysis from an electrolyzed solution concentrate and dilution water; (b) measuring the pH of a portion of the electrolysis solution in a detection cell with a pH probe connected in fluid communication with said portion of the electrolysis solution; (c) controlling the pH of said portion of the electrolysis solution at pH 5.5 to 7.5 with a pH modifier in said detection cell; (d) measuring the chlorine oxyanion concentration of said portion of the electrolysis solution from 10 ppm to 1,000 ppm using a chlorine sensor in said detection cell; (e) adjust the concentration of chlorine oxyanion in the electrolysis solution obtained in step (a) by means of a feedback circuit mechanism that adjusts the amount of electrolyte solution concentrate and / or dilution water; (f) contacting the electrolysis solution obtained in step (e) with the equipment that needs treatment by supplying the solution through a fluid communication medium.Un método de limpieza o higienización o tratamiento antimicrobiano de un equipo que necesita tratamiento usando una disolución de oxianiones de cloro generados electrolíticamente en un sistema de limpieza de recirculación automatizado o de un solo paso, que comprende: (a) producir in situ una disolución de electrólisis a partir de un concentrado de disolución electrolizada y agua de dilución; (b) medir el pH de una porción de la disolución de electrólisis en una celda de detección con una sonda de pH conectada en comunicación de fluido con dicha porción de la disolución de electrólisis; (c) controlar el pH de dicha porción de la disolución de electrólisis a pH de 5,5 a 7,5 con un modificador de pH en dicha celda de detección; (d) medir la concentración de oxianión de cloro de