Ozone Helps Manchester Capture Best Taste Award

Manchester Water Works’ drinking water won “New England’s Best” in a recent taste-testing competition.

A panel of independent, international judges sampled drinking water from utilities throughout New England during the recent annual conference of the New England Water Works Association.

The field of contestants were utilities that had no violations of state or federal safe drinking water standards during the previous year.

Manchester Water Works will compete against utilities from North America for the title of “Best of the Best” drinking water in June 2011, during the conference of the American Water Works Association.

Manchester Water Works serves 160,000 residential, industrial, and commercial consumers in the city, as well as Auburn, Bedford, Derry, Goffstown, Hooksett, and Londonderry.

In 2006, the Manchester Water Works treatment plant underwent a $30 million renovation, which replaced the disinfection and filtration system with a more advanced ozone and carbon treatment process. Ozone is known to improve the aesthetics of drinking water while providing disinfection.


Ozone to Treat Contaminated Chinese Lake

A contaminated Chinese lake is to serve as a test bed for a new environmental cleanup technology involving ozone bubbles.

The lake of Taihu, next to the 4.5 million-strong city of Wuxi, has been contaminated by a variety of pollutants for years from the industrial businesses in Wuxi. It will use a system known as heightened ozonation, in which micro bubbles of ozone pass through the target material to free pollutants.

The technology, developed at the University of Utah, uses a pressurised metal vessel designed to produce ozone micro bubbles by repeated pressurization and pressure release with ozone gas. The micro bubbles help to break down hydrocarbons.

A chelating agent is then passed through the target material to remove metal contaminants, followed by lime, which is used to extract them from the material altogether.

The technology will clean up soil at the Chinese site, which will be used for tree planting on public land. The project will take about three months. Although the system is currently being used to treat soil, it can be expanded to cover water, algae and sewage waste.

The work is being conducted by Chinese environmental cleanup giant Honde. If it is successful, it will be replicated at other sites around the lake, to test it on other types of pollutant.


Pfizer Green Facility Uses Ozone for Water Purification

Pfizer Biotechnology Ireland has constructed the Monoclonal Antibodies (MAbs) Small Scale Facility (SSF) at Shanbally, Ringaskiddy, Co. Cork, Ireland. The facility serves to establish a strategic biotechnology manufacturing center of excellence and is planned to support the rapid development of new biotechnology products.

Utilizing best practice and Pfizer’s Green Building guidelines, a large number of energy efficient features were applied in the design. As well as items which were commonly applied across the majority of utility systems, specific measures undertaken include economizers on boilers, heat recovery from blow down to pre-heat make-up water, automatic oxygen trim, gas boilers and low NOx burners, and all condensate systems are designed for the return of condensate to a central receiver/deaerator. Cooling water systems were designed such that the RO waste water stream, regeneration and reject, can be used as feed-water for make-up. For clean water system sanitization purposes, ozone is used on RIW (Reduced Ion Water) rather than heat/steam, and final treatment on purified water systems is electro-deionized, with meters provided to monitor all water use. Point of use coolers are utilized rather than loop coolers.