{"id":3306,"date":"2026-07-24T16:42:06","date_gmt":"2026-07-24T08:42:06","guid":{"rendered":"https:\/\/jxhg.net\/?p=3306"},"modified":"2026-07-24T16:42:07","modified_gmt":"2026-07-24T08:42:07","slug":"polyacrylamide-pam-types-uses-selection-guide","status":"publish","type":"post","link":"https:\/\/jxhg.net\/fr\/blog\/polyacrylamide-pam-types-uses-selection-guide\/","title":{"rendered":"Polyacrylamide (PAM): Types, Specs &amp; How to Choose the Right Grade"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Polyacrylamide (PAM) is one of the most widely used polymers in water treatment and industrial solid-liquid separation. It works as a flocculant, sludge dewatering polymer, retention aid and thickener.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For most industrial buyers, the question is not&nbsp;<em>whether<\/em>&nbsp;PAM works\u2014it&#8217;s&nbsp;<em>which grade<\/em>&nbsp;works. A polymer that dewaters municipal sludge beautifully can fail completely on mining tailings. A grade suited to textile effluent may be wrong for paper-mill wastewater.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This guide covers what PAM is, the three charge types, their key specifications (molecular weight, charge density, dosage), typical applications, and a practical method for choosing the right grade\u2014including a comparison table you can use as a quick reference.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/jxhg.net\/wp-content\/uploads\/2026\/07\/pexels-852647495-27490882-1024x768.jpg\" alt=\"\" class=\"wp-image-2556\" srcset=\"https:\/\/jxhg.net\/wp-content\/uploads\/2026\/07\/pexels-852647495-27490882-1024x768.jpg 1024w, https:\/\/jxhg.net\/wp-content\/uploads\/2026\/07\/pexels-852647495-27490882-300x225.jpg 300w, https:\/\/jxhg.net\/wp-content\/uploads\/2026\/07\/pexels-852647495-27490882-768x576.jpg 768w, https:\/\/jxhg.net\/wp-content\/uploads\/2026\/07\/pexels-852647495-27490882-1536x1152.jpg 1536w, https:\/\/jxhg.net\/wp-content\/uploads\/2026\/07\/pexels-852647495-27490882-2048x1536.jpg 2048w, https:\/\/jxhg.net\/wp-content\/uploads\/2026\/07\/pexels-852647495-27490882-16x12.jpg 16w, https:\/\/jxhg.net\/wp-content\/uploads\/2026\/07\/pexels-852647495-27490882-600x450.jpg 600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What Is Polyacrylamide (PAM)?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/jxhg.net\/fr\/produit\/polyacrylamide-pam-polymer\/\" data-type=\"link\" data-id=\"https:\/\/jxhg.net\/product\/polyacrylamide-pam-polymer\/\">Polyacrylamide<\/a> is a water-soluble polymer built from acrylamide monomer units. Industrially it is supplied as white\u00a0<strong>granules\/powder<\/strong>\u00a0(typical active content \u2265 88\u201390%) or as\u00a0<strong>emulsion\/liquid<\/strong>. Dissolved in water, its long chains bridge fine suspended particles into larger, faster-settling flocs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That bridging action is why polyacrylamide flocculant improves floc formation, settling rate, filtration and dewatering efficiency. In short:&nbsp;<strong>PAM makes fine particles far easier to separate from water.<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Handling note:<\/strong>&nbsp;PAM powder should be dissolved at roughly&nbsp;<strong>0.1\u20130.3% concentration<\/strong>, added slowly into a vortex under moderate stirring, and given&nbsp;<strong>30\u201360 minutes<\/strong>&nbsp;to fully hydrate. Over-mixing shears the chains; dumping powder too fast creates &#8220;fish-eyes.&#8221;<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">The Three Types of PAM Polymer<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Different waste streams differ in particle charge, pH and organic load\u2014so PAM is classified by ionic charge.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. Anionic Polyacrylamide (APAM)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Negatively charged. Best for&nbsp;<strong>inorganic suspended solids<\/strong>\u2014mineral fines, sand, clay, weakly charged particles.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Typical molecular weight:\u00a0<strong>8\u201320 million<\/strong><\/li>\n\n\n\n<li>Typical anionic (charge) degree:\u00a0<strong>10\u201340%<\/strong><\/li>\n\n\n\n<li>Applications: mining wastewater, mineral processing, sand-washing and coal-washing water, many industrial effluents<\/li>\n\n\n\n<li>Goal: better settling, clarification and solid-liquid separation<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. Cationic Polyacrylamide (CPAM)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Positively charged. The go-to for&nbsp;<strong>sludge dewatering and organic-rich wastewater<\/strong>, where it neutralizes negatively charged organic particles and builds strong, water-releasing flocs.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Typical molecular weight:\u00a0<strong>6\u201312 million<\/strong><\/li>\n\n\n\n<li>Typical cationic (charge) degree:\u00a0<strong>10\u201360%<\/strong><\/li>\n\n\n\n<li>Applications: municipal &amp; industrial sludge dewatering, food-processing wastewater, paper-mill wastewater, biological sludge<\/li>\n\n\n\n<li>Goal: lower cake moisture, better dewatering on belt\/screw\/centrifuge presses<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3. Nonionic Polyacrylamide (NPAM)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Little or no ionic charge. Used in&nbsp;<strong>specialized systems<\/strong>&nbsp;where charge interaction isn&#8217;t the main mechanism or where APAM\/CPAM underperform\u2014often at lower pH or with mixed particle loads.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Typical molecular weight:\u00a0<strong>5\u201312 million<\/strong><\/li>\n\n\n\n<li>Applications: complex or acidic wastewater, certain conditioning and paper processes<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Quick Comparison Table<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Property<\/th><th class=\"has-text-align-left\" data-align=\"left\">Anionic (APAM)<\/th><th class=\"has-text-align-left\" data-align=\"left\">Cationic (CPAM)<\/th><th class=\"has-text-align-left\" data-align=\"left\">Nonionic (NPAM)<\/th><\/tr><\/thead><tbody><tr><td>Charge<\/td><td>Negative<\/td><td>Positive<\/td><td>Neutral<\/td><\/tr><tr><td>Molecular weight<\/td><td>8\u201320 M<\/td><td>6\u201312 M<\/td><td>5\u201312 M<\/td><\/tr><tr><td>Charge degree<\/td><td>10\u201340%<\/td><td>10\u201360%<\/td><td>~0%<\/td><\/tr><tr><td>Best for<\/td><td>Inorganic\/mineral solids<\/td><td>Organic sludge dewatering<\/td><td>Complex\/low-pH systems<\/td><\/tr><tr><td>Typical dosage<\/td><td>0.5\u20133 ppm (clarification)<\/td><td>3\u201310 kg\/ton dry solids (dewatering)<\/td><td>Application-dependent<\/td><\/tr><tr><td>Key sectors<\/td><td>Mining, mineral, sand\/coal wash<\/td><td>Municipal &amp; industrial sludge, paper, food<\/td><td>Specialty industrial<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><em>(Dosage ranges are indicative\u2014confirm by jar test.)<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Common Uses of Polyacrylamide PAM<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Water &amp; wastewater treatment.<\/strong>\u00a0A core use of polyacrylamide water treatment is boosting flocculation, sedimentation and clarification. A common sequence: a\u00a0<strong><a href=\"https:\/\/jxhg.net\/fr\/blog\/tag\/pac-coagulant\/\" data-type=\"post_tag\" data-id=\"44\">PAC coagulant<\/a><\/strong>\u00a0first destabilizes fine particles, then PAM builds large flocs\u2014cutting turbidity, suspended solids and sludge volume.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Sludge dewatering.<\/strong>&nbsp;PAM binds sludge particles and drives water release ahead of belt filter presses, centrifuges, screw presses and plate-and-frame presses. Correct dosing lowers cake moisture and disposal cost; over-dosing produces sticky, poorly structured sludge.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Textile &amp; paper-mill wastewater.<\/strong>&nbsp;In textile effluent (dyes, surfactants, solids) PAM improves post-coagulation clarification. In paper-mill wastewater it helps remove fibers and fillers and can aid retention and drainage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Mining &amp; mineral processing.<\/strong>\u00a0PAM settles fine mineral particles, clarifies process water, and improves tailings-water recovery and sedimentation efficiency.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Choose the Right PAM Grade<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Don&#8217;t pick on price or molecular weight alone\u2014higher MW is&nbsp;<em>not<\/em>&nbsp;automatically better. Match the grade to the water and the goal:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Wastewater type<\/strong>\u00a0\u2014 municipal sludge vs. textile vs. mining vs. paper each behave differently.<\/li>\n\n\n\n<li><strong>Particle characteristics<\/strong>\u00a0\u2014 organic vs. mineral vs. mixed loads flocculate differently.<\/li>\n\n\n\n<li><strong>Charge type<\/strong>\u00a0\u2014 select APAM \/ CPAM \/ NPAM from the water&#8217;s charge condition.<\/li>\n\n\n\n<li><strong>Molecular weight<\/strong>\u00a0\u2014 higher MW improves bridging but raises viscosity and slows dissolution.<\/li>\n\n\n\n<li><strong>Dosage economics<\/strong>\u00a0\u2014 the best grade hits your target at a\u00a0<em>reasonable<\/em>\u00a0dose (see cost note below).<\/li>\n\n\n\n<li><strong>Equipment<\/strong>\u00a0\u2014 centrifuges, filter presses and clarifiers need different floc strength and size.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Why Jar Testing Matters<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Jar testing is the most reliable way to select PAM, letting you compare grades under&nbsp;<em>your<\/em>&nbsp;real wastewater. Observe:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Floc size and strength<\/li>\n\n\n\n<li>Settling speed and supernatant clarity<\/li>\n\n\n\n<li>Sludge volume and dewatering performance<\/li>\n\n\n\n<li>Required dosage<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A small change in grade can cause a large change in results\u2014so&nbsp;<strong>request samples and jar-test before any bulk order.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Common Mistakes When Buying PAM<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Buying on price per ton.<\/strong>\u00a0A cheaper polymer often needs a much higher dose, raising\u00a0<em>total<\/em>\u00a0treatment cost. Compare cost-per-treated-volume, not sticker price.<\/li>\n\n\n\n<li><strong>One grade for every stream.<\/strong>\u00a0A mining-water grade rarely dewaters sludge well.<\/li>\n\n\n\n<li><strong>Poor dissolution.<\/strong>\u00a0Fast dumping or bad mixing creates fish-eyes, wastes product and cuts performance\u2014follow the 0.1\u20130.3% \/ slow-feed \/ full-hydration rule above.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Final Thoughts<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PAM is a highly effective polymer across water treatment, sludge dewatering, mining, textile and paper applications\u2014but performance hinges on the right grade. For most buyers, the smart path is to jar-test anionic, cationic and nonionic samples and compare floc formation, dewatering, operating stability and total cost.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><a href=\"https:\/\/jxhg.net\/fr\/\" data-type=\"page\" data-id=\"964\">Jinxiang Chemical<\/a><\/strong>\u00a0supplies APAM, CPAM and NPAM for water and wastewater treatment, sludge dewatering, textile, paper-mill and mining applications.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong> Get free selection help:<\/strong>\u00a0Send us your wastewater conditions (type, pH, TSS, current dosage, equipment) and we&#8217;ll recommend grades.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">FAQ<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>What is PAM used for?<\/strong><br>As a flocculant, wastewater-treatment polymer, sludge-dewatering polymer and solid-liquid separation aid across many industries.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>What is the difference between anionic and cationic polyacrylamide?<\/strong><br>Anionic PAM suits inorganic\/mineral wastewater; cationic PAM suits organic wastewater and sludge dewatering.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Can PAM be used with PAC?<\/strong><br>Yes, PAC coagulates (destabilizes fine particles) and PAM flocculates (builds large flocs); they&#8217;re frequently used together.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>How do I choose the right PAM polymer?<\/strong><br>It depends on wastewater type, particle charge, pH, sludge characteristics and equipment\u2014jar test before bulk purchase.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>How much PAM should I dose?<\/strong><br>Typically 0.5\u20133 ppm for clarification and 3\u201310 kg per ton of dry solids for dewatering\u2014confirm by jar test, since real dosage varies with water quality.<\/p>","protected":false},"excerpt":{"rendered":"<p>Compare anionic, cationic &#038; nonionic polyacrylamide by molecular weight, charge density and dosage\u2014and learn how to choose the right PAM flocculant for water treatment and sludge dewatering.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[32],"tags":[49,50,47,48],"class_list":["post-3306","post","type-post","status-publish","format-standard","hentry","category-application-of-wastewater-treatment-agents","tag-pam-polymer","tag-polyacrylamide-flocculant","tag-polyacrylamide-pam","tag-wastewater-treatment-polymer"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/jxhg.net\/fr\/wp-json\/wp\/v2\/posts\/3306","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jxhg.net\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jxhg.net\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jxhg.net\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jxhg.net\/fr\/wp-json\/wp\/v2\/comments?post=3306"}],"version-history":[{"count":3,"href":"https:\/\/jxhg.net\/fr\/wp-json\/wp\/v2\/posts\/3306\/revisions"}],"predecessor-version":[{"id":3362,"href":"https:\/\/jxhg.net\/fr\/wp-json\/wp\/v2\/posts\/3306\/revisions\/3362"}],"wp:attachment":[{"href":"https:\/\/jxhg.net\/fr\/wp-json\/wp\/v2\/media?parent=3306"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jxhg.net\/fr\/wp-json\/wp\/v2\/categories?post=3306"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jxhg.net\/fr\/wp-json\/wp\/v2\/tags?post=3306"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}