{"id":5929,"date":"2026-07-20T11:44:17","date_gmt":"2026-07-20T04:44:17","guid":{"rendered":"https:\/\/amco.co.th\/?p=5929"},"modified":"2026-07-20T12:12:41","modified_gmt":"2026-07-20T05:12:41","slug":"side-stream-filtration-cooling-tower","status":"publish","type":"post","link":"https:\/\/amco.co.th\/en\/side-stream-filtration-cooling-tower\/","title":{"rendered":"Side Stream Filtration for Cooling Towers: 4 Hidden Costs It Cuts (The Honest Guide)"},"content":{"rendered":"\n

Side stream filtration<\/strong> continuously cleans a small slipstream of your cooling-tower water \u2014 usually less than 10% of the recirculation flow \u2014 so the whole loop stays clear of the suspended solids, scale particles, and biofilm habitat that quietly raise your energy, water, and chemical bills. This guide explains what it does, how it actually works, and \u2014 just as importantly \u2014 what it does not<\/em> do, backed by figures measured on a live cooling tower rather than a brochure.<\/p>\n\n\n\n

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Table of contents<\/h3>\n\n\n\n
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  1. What is side stream filtration for a cooling tower?<\/li>\n\n\n\n
  2. The four hidden costs of scale \u2014 one root cause<\/li>\n\n\n\n
  3. How it works, honestly (the three-step mechanism)<\/li>\n\n\n\n
  4. What a real field trial measured<\/li>\n\n\n\n
  5. What side stream filtration does not<\/em> do<\/li>\n\n\n\n
  6. Side stream filtration vs. an old sand filter<\/li>\n\n\n\n
  7. Is it right for your tower? (sizing, honestly)<\/li>\n\n\n\n
  8. Frequently asked questions<\/li>\n<\/ol>\n\n\n\n
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    1. What is side stream filtration for a cooling tower?<\/h3>\n\n\n\n

    Side stream filtration means filtering a small, continuous slipstream of the recirculating water \u2014 typically under 10% of the total flow \u2014 and returning it clean to the loop. Because the same water passes through many times an hour, a small filter on a side loop keeps the entire system clean over the course of a day.<\/p>\n\n\n\n

    It matters because a cooling tower concentrates dirt. Every time water evaporates to reject heat, the calcium, minerals, and airborne dust left behind become more concentrated. Left alone, that load settles out as scale and biofilm<\/a> on the hottest, most expensive surfaces in your plant \u2014 the heat-exchanger tubes. Side stream filtration is the mechanism that pulls that load back out of the water before it can settle.<\/p>\n\n\n\n

    2. The four hidden costs of scale \u2014 one root cause<\/h3>\n\n\n\n

    A thin film of scale on a heat-exchange surface causes four separate costs at the same time:<\/p>\n\n\n\n