Entry for November 25, 2008

One of the advantages to using ozone and other advanced oxidation processes for water treatment applications is that this treatment method minimizes the formation of harmful byproducts in the treated water.  The use of chlorine, for example, can lead to the formation of chlorinated organic byproducts that can be harmful themselves.

Oxygen based oxidizers, such as ozone, and UV are much less likely to form hazardous byproducts.  Ozone and hydrogen peroxide, materials typically used for advanced oxidation processes, break down to oxygen after they react. 

Second, the reaction of these products with organic molecules normally results in the resulting break down products being more biodegradable and thus less toxic than the original molecule.  This means that natural occurring bacteria will break down the resulting molecules to carbon dioxide and salt. 

Another advantage of ozone and UV based advanced oxidation processes is that it is possible to operate without  purchasing or storing chemicals.  This makes them inherently simpler and safer than alternative treatment processes. 

Highly sensitive ozone monitors can detect leaks of ozone as a fraction of a part per million.  These monitors can be interlocked with the ozone generator to stop operation well before dangerous levels of ozone enter the atmosphere.  In locations a leak of ozone from an ozone generator would be stopped at levels below the normal ozone levels found at street level.  Since ozone is used as it is formed, there is no reservoir of ozone to worry about.  Once the generator stops, there is not further source of ozone to enter into the area.

Combining the inherent safety of such advanced oxidation processes with their high degree of effectiveness, such processes are an ideal choice for pollution control and remediation.

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Entry for November 21, 2008

The technical conference “Disinfection 2009” will be held at the end of February in Atlanta and is sponsored by WEF, AWWA, IWA, IUVA and the Georgia Association of Water Professionals.  This conference has provided a forum for those professionals concerned with disinfection needs and technologies since 1993. The conference will be focused on all aspects of the disinfection of water, wastewater, reuse water and biosolids. The conference will also have a special focus on the disinfection or other treatment of water, and the disinfection and treatment of wastewater in small communities and households in developed and developing countries.

This conference is targeted for engineers, scientists, engineer managers, consultants, academics, health officials, wastewater and water treatment plant operators and regulators, graduate students, implementing organizations, non-governmental organizations and governmental agencies, researchers, manufacturers and their representative groups, and the industrial community from North America and abroad.

The objective of this conference is to present and share information on various applications, status, and future directions of disinfection with respect to water, wastewater and biosolids throughout the world. It is designed to provide a forum for an exchange of ideas and experiences in this broad and dynamic area. Specific objectives are as follows:

  • Present uses and advances in technologies such as UV, chlorination, ozonation, other oxidant, disinfection and combined processes.
  • Clarify treatment and control measures forwater and wastewater in small communities and households in developed and developingcountries.
  • Provide regulatory updates on future disinfection standards for water, wastewater, reuse water, andbiosolids.
  • Discuss or inform on the current status and future use of alternative indicators of disinfection efficacy.

For more information go to Online www.wef.org/Disinfection

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Entry for November 13, 2008

The following list of upcoming events may be interesting to people that follow the water treatment field and especially those interested in ozone and advanced oxidation:

November 15-20, 2008 International Pool and Spa Expo in Las Vegas, NV, www.poolspapatio.com

November 16-20, 2008 AWWA Water Quality Technology Conference and Exposition, Cincinnati, OH, www.awwa.org

December 2-5, 2008 60th Annual NGWA Ground Water Expo, Las Vegas, NV, www.ngwa.org

February 12-13 2009 AWWA Research Symposium: “Emerging Contaminants”, Austin, TX, www.awwa.org

March 16-2, 2009 5th World Water forum, Istanbul, Turkey, www.worldwaterforum5.org

The research symposium might be of the greatest interest since research has suggested that oxidation may be the best option for treating emerging contaminants.

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