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breakpoint chlorination

Orenda four pillars, Orenda Pillar 2, Non-living organics, enzymes in pool, pool oxidant demand

Organic Waste and Carbon Management | Pillar 2

Bather waste. Non-Living Organics. Body Butter. Grease and oils. Whatever you want to call the organic waste products that contaminate swimming pools, managing them is the second of Orenda's Four Pillars. So what do we know about non-living organics? We know that swimmers and animals that use the pool leave behind oils and other carbon-based waste, and chlorine will try to oxidize these contaminants. Unfortunately, oxidation is not chlorine's specialty. Chlorine–or more specifically, the strong form of chlorine in water, Hypochlorous Acid (HOCl)–is primarily a sanitizer and disinfectant.

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Understanding Breakpoint Chlorination

Breakpoint chlorination is a key concept in pool chemistry. In May 2017, we published a two-part article about pool sanitizers. In part one we compared different chlorine types, and their pros and cons. This article dives deeper into the science of chlorination. We explore the difference between breakpoint chlorination and hyperchlorination (shocking).

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What are Chloramines?

Chloramines are chemical byproducts of chlorine oxidizing nitrogen-based compounds in water. They are referred to as disinfectant byproducts (DBPs). Normally, it is the incomplete oxidation of carbon, ammonia and nitrogen-based organic waste that creates the long list of DBPs, whereas chloramines themselves follow a specific pattern.

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