chlorine. Specifically, breakpoint chlorination is the point at which enough It takes a ratio of chlorine to ammonia atoms of to 1 to reach breakpoint, other. 15 Nov Hey mate! Breakpoint chlorination is the point where the demand for chlorine has been fully satisfied in terms of chlorine addition to water. When chlorine is. Continual breakpoint chlorination uses the continual addition of chlorine after bathers have left the pool to oxidise combined chlorine so that all of the total.

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Thanks for taking the time to read this long, in depth article. Non-chlorine shocks like monopersulfate oxidize Therefore, ammonia and chlorine are consumed in the reactions and lost from the pool. The breakpoint phenomenon occurs in this zone which is also known as the chloramine destruction zone.

This rapid decrease occurs because the dichloramine is reacting immediately with additional hypochlorous acid in a series of destruction reactions to form volatile compounds and breakppoint by-products such as nitrogen gas, nitrate and chloride. This will be explained more in depth in a moment Pool operators usually shock pools for one of two reasons:. Another Orenda product to help improve chlorine efficiency is PR, phosphate remover.

Like us on Facebook! Auto p p p p p. This initial reaction wipes out a chlorinaion portion of chlorine, which is why nothing shows up on the graph until point A.


The breakpoint curve is a graphical representation of chemical relationship that exists with constant addition of chlorine to swimming pool water containing a small amount of ammonia-nitrogen. Removing phosphates reduces the dissociation of Hydrogen from hypochlorous acid HOClmeaning you have more of the strong chlorine. Then you go through the graph above.

Definition – What does Breakpoint Chlorination mean? Charrois 1 Steve E. Get Access Get Access.

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The total residual consists of the nuisance residuals plus free chlorine. Thus, additional chlorine is required to destroy ammonia and chloramines.

Corrosionpedia explains Breakpoint Chlorination Once chlorine has been added to water, it is consumed by a type of chemical reaction that has a net effect of increasing the chlorine concentration. This curve has three zones. Breakpoint chlorination is the point where the demand for chlorine has been fully satisfied in terms of chlorine addition to the water.

Public Swimming Pool and Spa Pool Document provides detailed explanations and information on disinfection, pool chemistry, risk assessment and other issues relevant to swimming pool operation. Tuesday 9 April These compounds utilize the chlorine, resulting in zero chlorine residual.

Want to learn more about it? The video at the end of this article explains more chhlorination weakening chlorine. In reality, ammonia-nitrogen does not stay static but is continually added while the pool is open to the public. This is a common practice when disinfecting water in industrial water systems and swimming pools. This would look like a more prolonged downward trend toward breakpoint, because breakpoint would be at a much higher dose of chlorine.


This ratio indicates the point where the reacting chlorine and ammonia-nitrogen molecules are present in solution in equal numbers. Many pool operators refer to combined chlorine as chloramines.

Super Chlorination and Break Point Chlorination (Disinfecting Polluted Water) | PSM Made Easy

Does that sound efficient to you? The hump occurs, theoretically, at chlorine to ammonia-nitrogen weight ratio of 5: Public swimming pool issues may be discussed with an environmental health officer at a local Public Health Unit, or at your local council. It is one of the most typical forms of chlorination where adequate chlorine is incorporated into the water to achieve the breakpoint, keeping the water well chlorinated and appropriate for its intended use. We are in favor of a minimalist approach.

The oxidant demand is greater than the chlorine available to handle it. For a typical addition of chlorine, the reaction rate instantly increases and reduces the chlorine concentration. Thanks for reporting a problem. You can calculate any of the three with addition and subtraction. The oxidant demand in these cases can be chloramines, non-living organics, or any combination of both.