DEL Aquatics - Articles for Aquatics Professionals
The articles in this section address technical, regulatory or management issues associated with ozone disinfection for all types of aquatics venues. We have tried to make these accessible to every interested professional, so we are confident the technical demands they make will be comfortably met by our readers. Many of these articles will open as PDFs in a new window. We invite your comments or responses to these articles via our Contact Us form.
February 2012
MAHC Disinfection & Water Quality Module
- Draft 27 February 2012
The Center for Disease Control's Model Aquatic Health Code water quality module is open for initial public comment through April 27, 2012. It contains draft standards for secondary disinfection systems, specifically targeting the destruction of crypto oocysts. The final module will be posted here when available.
January 2012
A PDF of the ADA Requirements from APSP
All pools and venues open to the public must comply with disability accessibility requirements by March 15, 2012. This PDF supplied by the Association of Pool and Spa Professionals provides the details.
June 2011
Optimizing Mass-Transfer of Ozone Gas into Aqueous Solutions
This daunting title leads into some must-read information for aquatics professionals, especially those who work in aquariums and zoos. The article supplies a summary of the science behind why the negative pressure created by a vacuum-based ozone injection method is superior to the older bubble diffusion method for dissolving ozone into water. The health of the animals depends on effective disinfection power from ozone, so this is not an academic point. 
May 2011
Understanding Ozone Manufactured from Oxygen vs. Dried Air
Many years ago, the only option engineers had to prevent the corrosion of ozone generators was to dry the air used as a feed gas. The aim was to eliminate the formation of nitric acid caused by an interaction of the ozone with nitrogen. Today, some people are arguing to return to this dried air feed gas despite the fact that a better option has been available since the introduction of oxygen concentrators in the late 1950's. Highly reliable oxygen concentrators produce a feed gas that is almost devoid of nitrogen, elminating the danger of nitric acid. And, in this process, the ozone generator's efficiency is approximately doubled, AND the health of animals in aquariums and zoos is improved.
February 2011
MAHC Water Disinfection & Quality: A guide to the Guidelines
This whitepaper provides specific information to the public pool and spa community about the Model Aquatic Health Code and its emerging best practice guidelines for safe and effective pool water disinfection. Although our focus is on the recommended secondary disinfection systems, readers should note that the guidelines will cover a full range of issues for commercial aquatics, including topics like lifesafety and liability.
