I had a customer ask a question today that I thought may be applicable to more people, therefore I thought I would share the question and responses.<\/p>\n\n\n\n
Question = What is the effect or ORP in water after a Reverse Osmosis system?<\/strong><\/p>\n\n\n\n Answer = <\/strong>ORP is a generic term = Oxidation Reduction Potential.<\/p>\n\n\n\n In other words, anything that is an oxidant in water measures as ORP. This could be dissolved oxygen, chlorine, hydrogen peroxide, ozonides, or Ozone!<\/p>\n\n\n\n Therefore, the result of reverse osmoisis could go either way.<\/p>\n\n\n\n For example, if this is city water with a high level of free chlorine in the water, the RO system will remove the chlorine and potentially lower the ORP value.<\/p>\n\n\n\n However, if the water is high in organics that are consuming (depressing) the natural oxygen levels in water and the RO system removes these organics, the dissolved oxygen level may increase after RO and therefore the ORP values will increase.<\/p>\n\n\n\n In summary, the answer is “It depends”.<\/p>\n\n\n\n Follow-up question = Can adding ozone to water actually decrease the ORP values in city water if there is a high level of free chlorine in the water?<\/strong><\/p>\n\n\n\n Answer =<\/strong> Free Chlorine and ozone are a 1:1 ratio of destruction.<\/p>\n\n\n\n Cl- + O3 –> ClO + O2<\/em><\/p>\n\n\n\n After chlorine is reduced to 0 in water, then ozone levels rise. Therefore, all free chlorine in water must be reacted with prior to creating an ozone residual in water.<\/p>\n\n\n\n To help understand this I created the following chart showing ozone dosage into water, free chlorine reduction and then dissolved ozone and ORP rises.<\/p>\n\n\n\n As you can see, ozone and chlorine will react with each-other thereby decreasing the ORP values in the water. However, as ozone is added, eventually there is dissolved ozone and therefore an increase in ORP values.<\/p>\n\n\n\n This is theroetical of course, there could be other factors and water quality issues at play here. However, this gives a fundemental outline of how ozone vs chlorine in city water will commonly work.<\/p>\n\n\n\n Note \u2013 displayed correlation between dissolved ozone levels and ORP is just for example purposes and likely will not be realistic in your particular water. There is no definitive correlation between ORP values and dissolved ozone, this can vary with different water qualities.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":" I had a customer ask a question today that I thought may be applicable to more people, therefore I thought I would share the question […]<\/p>\n","protected":false},"author":15,"featured_media":3479,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[211],"tags":[],"class_list":["post-3933","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ozone-industry-news"],"_links":{"self":[{"href":"https:\/\/www.oxidationtech.com\/blog\/wp-json\/wp\/v2\/posts\/3933","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.oxidationtech.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.oxidationtech.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.oxidationtech.com\/blog\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/www.oxidationtech.com\/blog\/wp-json\/wp\/v2\/comments?post=3933"}],"version-history":[{"count":1,"href":"https:\/\/www.oxidationtech.com\/blog\/wp-json\/wp\/v2\/posts\/3933\/revisions"}],"predecessor-version":[{"id":3934,"href":"https:\/\/www.oxidationtech.com\/blog\/wp-json\/wp\/v2\/posts\/3933\/revisions\/3934"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.oxidationtech.com\/blog\/wp-json\/wp\/v2\/media\/3479"}],"wp:attachment":[{"href":"https:\/\/www.oxidationtech.com\/blog\/wp-json\/wp\/v2\/media?parent=3933"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.oxidationtech.com\/blog\/wp-json\/wp\/v2\/categories?post=3933"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.oxidationtech.com\/blog\/wp-json\/wp\/v2\/tags?post=3933"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Free Chlorine<\/strong><\/td> Dissolved ozone<\/strong><\/td> Ozone dosage<\/strong><\/td> ORP<\/strong><\/td><\/tr> 1.0 ppm<\/td> 0 ppm<\/td> 0 ppm<\/td> 600<\/td><\/tr> 0.75 ppm<\/td> 0 ppm<\/td> 0.25 ppm<\/td> 575<\/td><\/tr> 0.5 ppm<\/td> 0 ppm<\/td> 0.5 ppm<\/td> 550<\/td><\/tr> 0.25 ppm<\/td> 0 ppm<\/td> 0.75 ppm<\/td> 525<\/td><\/tr> 0.0 ppm<\/td> 0 ppm<\/td> 1.0 ppm<\/td> 500<\/td><\/tr> 0.0 ppm<\/td> 0.25 ppm<\/td> 1.25 ppm<\/td> 600<\/td><\/tr> 0.0 ppm<\/td> 0.50 ppm<\/td> 1.5 ppm<\/td> 700<\/td><\/tr> 0.0 ppm<\/td> 0.75 ppm<\/td> 1.75 ppm<\/td> 800<\/td><\/tr> 0.0 ppm<\/td> 1.0 ppm<\/td> 2.0 ppm<\/td> 900<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n