Patent ID: 8809064

Claim:
An ozone washing system, comprising: a washing machine; an ozone reservoir coupled in fluid communication with the washing machine; a hydroxyl radical sensor coupled in fluid communication with the washing machine, the hydroxyl radical sensor configured to quantify hydroxyl radical levels in one or more samples of fluid from the washing machine based on fluorescence of a hydroxyl radical indicator, wherein the hydroxyl radical sensor is sensitive to oxidization in the presence of hydroxyl radicals; a filter coupled in fluid communication with a large molecule sieve wherein the large molecule sieve is configured to remove from the one or more samples, soluble dye molecules comprising components that can compete with fluorescence produced by the hydroxyl radical indicator; and a control unit operatively associated with the hydroxyl radical sensor, the control unit configured to direct the insertion of ozone associated with the ozone reservoir to the washing machine based at least in part on the sensed hydroxyl radical levels.