{"id":1101,"date":"2019-03-09T08:04:02","date_gmt":"2019-03-09T08:04:02","guid":{"rendered":"https:\/\/www.ampac1.com\/blog\/?p=1101"},"modified":"2026-04-14T02:44:41","modified_gmt":"2026-04-14T02:44:41","slug":"how-are-chemicals-good-for-your-industrial-ro-system","status":"publish","type":"post","link":"https:\/\/www.ampac1.com\/blog\/how-are-chemicals-good-for-your-industrial-ro-system\/","title":{"rendered":"How Are Chemicals Good For Your Industrial RO System?"},"content":{"rendered":"
Quick Answer:<\/strong> Industrial RO systems depend on specific chemical programs: antiscalants prevent carbonate and sulfate scale on membranes, sodium bisulfite or activated carbon removes chlorine that damages polyamide membranes, citric acid and caustic cleaning agents remove foulants during CIP cycles, and biocides control biofilm between cleanings. Correct chemical selection based on feed water chemistry is essential for membrane longevity.<\/div>\n

If you own an Industrial RO, chances are you have a pretreatment system for softening the water before processing. Also, you must already have chemicals to help maintain your machinery for longer lifespan and efficiency. But how good are these chemicals for your equipment after all?<\/span><\/p>\n

Pre-testing chemicals for compatibility with your Industrial RO system is a topic often overlooked while setting up a treatment facility. It is true <\/span>reverse osmosis<\/span><\/a> removes almost every contaminant but the process is not compatible with every chemical in the book. Though it does remove them, they are harmful to the system if left unchecked and can result in extremely decreased efficiency. Some of the chemicals that are used for pretesting of the water are as follows.<\/span><\/p>\n

    \n
  1. Anti-scalants:<\/b>
    \n<\/span>These are chemicals responsible to protect the RO from scaling and spoiling. These must be tested for 2 things. First is microbiological growth. Anti-scalants if kept at a place for too long can develop certain bacteria that enter the water system in our house, factory or institution. This makes the dilution tank not fit for use. The chemical must also be tested for compatibility with <\/span>    membranes<\/span><\/a>.<\/span> Not every antiscalant is membrane friendly. They are supposed to remove the scaling on the surface but if found to be incompatible, can result in erosion of the membrane.<\/span><\/li>\n
  2. Cleaning chemicals:<\/b>
    \n<\/span>Chemicals are introduced into the system when they are used to pre-filter the water, in order to avoid unnecessary troubles in your <\/span>    industrial RO<\/span><\/a> that can be caused by impurities. But each chemical in itself reacts very differently with each other as well as the system. Therefore pre-testing becomes essential before any chemical is used in the system. The tests that can help determine the kind of effect a chemical can have on the system are broadly two. Soak test procedure and cleaning test procedure. While you compare the results of the test, you ideally must have only a flux loss of 5 percent and absolutely no increase in the salt passage over the baseline parameters.<\/span><\/li>\n
  3. Biocides: <\/b>
    \n<\/b>These are a very important step in pre-treatment of water. Biocides ensure elimination of almost every water-borne diseases. these however if used in large amounts can cause the membrane to lose its permeability or salt rejection. But that does not mean we should put a full stop to the use of these chemicals that protect us from diseases. The key is to use them mindfully when in RO. A continuous operation test should be done extensively before it is used for everyday use. A biocide will get a green light if there is no change in the salt passage and normal permeable flow in 1,000 hours of its testing.<\/span><\/li>\n<\/ol>\n

    Anti-scalants, biocides, and cleaning chemicals are the most commonly used <\/span>chemicals for pretreatment<\/span><\/a> of the water. The testing parameters and procedures are pretty much straightforward. They must have a regular and normalized membrane flow and salt passage without any effect on the performance of the RO system. These procedures are essential in treatment facilities where water is supplied and provided to more than thousands of families each day.<\/span><\/p>\n

    Author\u2019s Bio:<\/i><\/b>
    \n<\/span>    AMPAC USA<\/span><\/i><\/a> is a leading manufacturer of advanced reverse osmosis water treatment systems. For over 28 years the company has been providing its customers and clients around the world solutions to their water treatment problems. With years of an impressive track record, Ampac strives to develop solutions to make reverse osmosis systems, advanced for improved quality and cost efficiency.<\/span><\/i><\/p>\n

    <\/p>\n

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    What flow rates are available for emergency water treatment?<\/h3>\n
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    AMPAC USA's emergency systems range from 1,500 GPD portable units to 50,000+ GPD trailer-mounted systems. Military-specification units are available for forward operating base deployment, producing potable water meeting EPA and WHO drinking water standards from virtually any source.<\/p>\n<\/div>\n<\/div>\n

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    Are emergency RO systems suitable for disaster relief operations?<\/h3>\n
    \n

    Yes. AMPAC USA's emergency systems are used by FEMA, the U.S. military, and international NGOs for disaster relief. They treat flood water, contaminated groundwater, and brackish sources, removing bacteria, viruses, and chemical contaminants to produce safe drinking water on-site.<\/p>\n<\/div>\n<\/div>\n

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    What power sources can emergency water purification systems use?<\/h3>\n
    \n

    AMPAC USA's emergency systems can run on generator power (120\/240V or 480V 3-phase), solar panels with battery backup, or vehicle power take-off (PTO). Low-power models consume as little as 0.5 kW, making them viable for off-grid deployment.<\/p>\n<\/div>\n<\/div>\n

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    How durable are military-grade water purification systems?<\/h3>\n
    \n

    AMPAC USA's military systems are built to MIL-SPEC standards with stainless steel frames, powder-coated components, and UV-resistant materials. They are designed to operate in temperatures from -20\u00b0F to 120\u00b0F and are vibration-tested for transport in military vehicles.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

    <\/p>\n

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    Conclusion<\/h2>\n

    This post highlighted how emergency and military-grade water purification systems provide safe drinking water rapidly in the most challenging field conditions. For organizations requiring deployable water treatment capability, AMPAC USA engineers portable and trailer-mounted systems built to perform wherever they are needed. Contact our team at info@ampac1.com or (909) 548-4900 to discuss your emergency water treatment requirements.<\/p>\n<\/div>\n

    Chemical Treatment Programs for Industrial RO System Performance<\/h2>\n

    Industrial reverse osmosis systems require a carefully designed chemical treatment program to protect membrane integrity, maintain performance, and extend system life. Chemical programs address four distinct threats to RO membrane performance: inorganic scale deposition, biofouling, colloidal fouling, and oxidative membrane degradation. Each threat requires specific chemical interventions, and the selection of specific chemicals must be matched to the feed water chemistry, recovery rate, and membrane type in use.<\/p>\n

    Antiscalants are the most critical ongoing chemical addition for most industrial RO systems. As feed water is concentrated through the RO process, scaling ions (calcium, magnesium, barium, strontium, silica, sulfate) exceed their solubility limits and precipitate on membrane surfaces. Calcium carbonate scaling is the most common scaling mechanism — occurring when the Langelier Saturation Index (LSI) of the concentrate exceeds +0.5 without chemical inhibition. Antiscalant polymers (polyacrylic acid, phosphonates, maleic acid copolymers) interrupt crystal growth at dosages of 2-10 mg\/L, allowing recovery rates of 75-85% without scale formation. For silica-containing feeds, specialized silica-dispersant antiscalants are required at higher doses. Antiscalant selection must be based on comprehensive water analysis and system modeling using supplier-provided scaling prediction software.<\/p>\n

    Sodium bisulfite (SBS) or sodium metabisulfite is injected upstream of RO membranes to neutralize residual chlorine in feeds from chlorinated municipal supplies. Polyamide TFC membranes are irreversibly damaged by continuous free chlorine exposure above 0.1 mg\/L. The standard SBS dose is 3 mg SBS per mg of free chlorine present, with an excess dose of 1-3 mg\/L to ensure complete neutralization before the membrane. Activated carbon media filters are an alternative for smaller systems. AMPAC USA designs complete chemical treatment programs as part of each industrial RO system installation, including dosing pump specifications, chemical storage sizing, and monitoring protocols.<\/p>\n

    \n

    Frequently Asked Questions<\/h2>\n
    \n

    Q: What is an antiscalant and how does it work in an RO system?<\/h3>\n
    \n

    A: Antiscalants are chemical additives dosed into RO feed water to prevent mineral scale formation on membrane surfaces. They work by adsorbing onto crystal nuclei and disrupting crystal growth kinetics, allowing dissolved ions to remain in solution even when their concentration exceeds normal solubility limits.<\/p>\n<\/div>\n<\/div>\n

    \n

    Q: Why does chlorine damage RO membranes?<\/h3>\n
    \n

    A: Polyamide thin-film composite (TFC) membranes are susceptible to oxidative degradation by free chlorine. Even low concentrations (0.1 mg\/L) cause gradual degradation of the polyamide layer, increasing salt passage. Exposure to higher chlorine concentrations (1+ mg\/L) causes rapid, irreversible membrane damage. Dechlorination with sodium bisulfite or activated carbon is mandatory for chlorinated feeds.<\/p>\n<\/div>\n<\/div>\n

    \n

    Q: What is CIP (Clean In Place) for an industrial RO system?<\/h3>\n
    \n

    A: CIP is a membrane cleaning procedure performed without removing membranes from their housings. Low-pH cleaning (citric acid, hydrochloric acid) removes inorganic scale and metal oxides. High-pH cleaning (sodium hydroxide, surfactants) removes biofilm, organic fouling, and colloidal particles. CIP frequency is determined by normalized performance trend monitoring.<\/p>\n<\/div>\n<\/div>\n

    \n

    Q: How do you know when an RO membrane needs cleaning?<\/h3>\n
    \n

    A: Clean when: normalized permeate flow drops 10-15% from baseline, normalized salt passage increases 10-15%, or normalized pressure differential increases 10-15%. These threshold changes indicate fouling has progressed enough to justify the cost and downtime of CIP cleaning.<\/p>\n<\/div>\n<\/div>\n

    \n

    Q: What biocides are used in industrial RO systems?<\/h3>\n
    \n

    A: Non-oxidizing biocides including DBNPA (2,2-dibromo-3-nitrilopropionamide) and isothiazolinone compounds are commonly used in RO systems — they are membrane-compatible unlike chlorine. Periodic biocide addition during system shutdown or at low doses during operation controls biofilm development on membrane surfaces.<\/p>\n<\/div>\n<\/div>\n

    \n

    Q: What chemicals are used to preserve RO membranes during shutdown?<\/h3>\n
    \n

    A: For short-term shutdown (less than 30 days), membranes are flushed with permeate water and stored in sodium metabisulfite solution (0.5-1%) at pH 5-6, refrigerated to minimize biological growth. For long-term storage, glycerol solution or proprietary preservative solutions prevent membrane drying and biofouling.<\/p>\n<\/div>\n<\/div>\n

    \n

    Q: Is pH adjustment necessary for industrial RO systems?<\/h3>\n
    \n

    A: Acid dosing (sulfuric or hydrochloric acid) to reduce feed pH to 6.5-7.0 is standard for high-alkalinity, hard water feeds to suppress carbonate scale formation at the membrane. High-pH feeds also cause silica polymerization and scaling. Some feeds require caustic dosing to raise pH for silica control — exact requirements depend on water analysis and system modeling.<\/p>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

    If you own an Industrial RO, chances are you have a pretreatment system for softening the water before processing. Also, you must already have chemicals to help maintain your machinery<\/p>\n","protected":false},"author":1,"featured_media":2377,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rop_custom_images_group":[],"rop_custom_messages_group":[],"rop_publish_now":"initial","rop_publish_now_accounts":[],"rop_publish_now_history":[],"rop_publish_now_status":"pending","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-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":"","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-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":"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":""},"mobile":{"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":""}},"footnotes":""},"categories":[66],"tags":[70,19],"class_list":["post-1101","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industrial-reverse-osmosis","tag-industrial-ro","tag-reverse-osmosis"],"_links":{"self":[{"href":"https:\/\/www.ampac1.com\/blog\/wp-json\/wp\/v2\/posts\/1101","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ampac1.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ampac1.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ampac1.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ampac1.com\/blog\/wp-json\/wp\/v2\/comments?post=1101"}],"version-history":[{"count":4,"href":"https:\/\/www.ampac1.com\/blog\/wp-json\/wp\/v2\/posts\/1101\/revisions"}],"predecessor-version":[{"id":88609,"href":"https:\/\/www.ampac1.com\/blog\/wp-json\/wp\/v2\/posts\/1101\/revisions\/88609"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ampac1.com\/blog\/wp-json\/wp\/v2\/media\/2377"}],"wp:attachment":[{"href":"https:\/\/www.ampac1.com\/blog\/wp-json\/wp\/v2\/media?parent=1101"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ampac1.com\/blog\/wp-json\/wp\/v2\/categories?post=1101"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ampac1.com\/blog\/wp-json\/wp\/v2\/tags?post=1101"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}