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The Hammonds Advanced Technology Chlorination System

Table Chlorination vs Gas and Bleach

For many water chlorination operators, chlorine gas and chlorine bleach have long been the industry standard used for most disinfection applications. Inherent in both of those methods are material safety concerns, handling obstacles and personnel concerns. That's the bad news.

The good news is that all that is changing with the industry's move to safe, reliable and accurate tablet chlorination. Most of the negative aspects of using chlorine gas and bleach are now...well, in a word, gone. As in history. Finito. Lights out. Good bye and good riddance.

The chart below offers an excellent comparison of these methods vs. tablet chlorination, so you can judge for yourself the real benefit to your organization:

Characteristic		Tablet		Bleach		Gas
Safety		No spills		Spills & leaks cause significant damage		Leaks can cause significant damage
Price		Costs more upfront,; lower overall because of lower long-term operating costs		Lower upfront costs; Liability insurance and EPA & OSHA regulations raise total cost		Lower upfront costs; Liability insurance and EPA & OSHA regulations raise total cost
Convenience		Easy to handle; Lightweight - 55 lbs. Equals 550 lbs. of bleach		Heavy drums or many small carboys		Hard to maneuver cylinders; special handling & training needed
pH effects		Lower pH (10.5) reduces acid usage by 50% or more		High pH; lots of acid for pH control		Very low pH; lots of messy soda ash, caustic for pH control
Strength Maintenance		Stable, consistent; only a small change over one year		Significant loss within a week		Consistently 100% chlorine
Control		Consistent strength provides reliable control		Constantly changing strength makes it difficult to control		Harder to automate
Storage		6 gallon pail holds the equivalent of 55 lbs. Of bleach		Drums or bulk tanks; regulated by the EPA & OSHA		Regulated by the EPA & OSHA; separate room needed with special access, fans and scrubbers
Material Compatibility		Less corrosive		More corrosive; more fumes while operating		Very corrosive

Source: PPG Industries, Inc.

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