... effects (taste and odor) of the sulfurous water, an ozone treatment system was installed seven years after occupation of the home. During the intervening period following the treatment system installation, multiple pinhole failures became evident. Upon examination of pipes removed during repair, a thick...

...Abstract Two aspects of ozone utilization as sole chemical treatment for cooling water demand a better understanding: a) the effect of dissolved ozone on the corrosion behavior of heat exchanger structural materials and b) the biocidal action of ozone on bacterial biofilms. To assess the effect...

... stimulators measured. quartz crystal microbalance probe outdoor exposure corrosivity atmospheric corrosion copper silver gold aerosol particles sulfur dioxide nitrogen dioxide ozone INTRODUCTION Over the last decades substantial progress has been made in developing experimental techniques, which...

... for control (blank) Used urea control for baseline for calculation of results. Process Simulation Abstract Legislation to control NO_x emissions, one cause of acid rain and ozone induced smog, has created an impetus to control NO_x emissions. Selective Non Catalytic Reduction (SNCR...

...Abstract Environmental concern about chlorinated organic compounds generated from traditional bleach plants has led to a development of new environmentally friendly bleaching processes. Recently, the development of ozone bleaching has progressed from pilot operations to production scale...

...TABLE 1 REDUCTION POTENTIALS FOR VARIOUS OXIDIZING REACTIONS Redox Couple e° (V_SHE) Nominal conditions in artificial seawater, pH 8.2 e (V_SHE) at nominal conditions O₃/O₂ 2.08 Ozonated, p(O₃) = 0.024 atm 1.55 HOCl...

...Ozone in Seawater Abstract The corrosion resistance of austenitic stainless steels in artificial seawater containing 0.2 to 0.4 mg/L dissolved ozone was investigated. According to cyclic polarization data, UNS S30400 and S31600 stainless steels are resistant to pit initiation after 8 weeks...

... is raised by the addition of waste streams. Abstract During two previous field trial evaluations, ozone failed to provide acceptable levels of control as a corrosion and scale inhibitor. In order to confirm prior results, a third trial site was closely monitored using both a mobile cooling water laboratory...

...In the early 1900s, ozone was first used for the disinfection of municipal drinking water in Nice, France. Since then, water treatment by ozonation has been favored in Europe because of improved taste, odor control and disinfection compared to treatment by chlorination. Today, due...

..., better efficiency can generally be realized in the waste treatment plant. Abstract Data is presented from two field trials where carbon dioxide and ozone were used, in separate efforts, to minimize aqueous discharges from cooling water systems. Carbon dioxide was employed as an alternative to minerals...

...INTRODUCTION Ozone and other non-chemical technologies are being marketed for replacement of chemical treatment in performance of HVAC systems, in drinking and waste water treatments, textile, food, oil and agriculture industries, and other municipal water treatments ^{1 - 3}...

... preserving corrosion inhibition and avoiding scale deposition ¹ . Ozone has been proposed as an environmentally acceptable biocide for treating cooling waters, primarily for its excellent biocidal properties, but also for its apparently beneficial effects on scaling and corrosion control ²...

...Ozone can, however, work to remove at least one kind of already present scale. Scale that has been cemented together with the by-products of bacteria and algae can be removed by Ozone. The total planktonic bacteria count in a well maintained Ozone system is extremely low, several orders...

...If the concentration leaving the Ozone generator is lower than the design value, there may be one or more problems associated with the Ozone generator. Among the most common of these problems are moisture in the Ozone Generation cell due to insufficient drying of the feed, insufficient feed gas...

...Abstract The use of ozone as a biocide in conjunction with conventional chemical treatment for corrosion, scale and deposit control was investigated using bench top and process simulation experiments. Aspects of aqueous ozone chemistry relevant to cooling water operation were discussed...

...SUMMARY This brief review indicates that there is a great deal of conflicting data regarding the influence of dissolved ozone on the corrosion behavior of engineering alloys. Increased corrosion rates, decreased corrosion rates and no change in corrosion rates have all been reported for mild steel...

...Abstract Once it has been decided to install ozone for the treatment of cooling water, the next step is to assure that the equipment is sized and designed for the most reliable and economical operation. Design principles are presented which have proved to be effective for ozonation systems which...

...Abstract To select ozonation equipment wisely for application to cooling water treatment, a number of parameters must be considered so that the potential user of ozone can choose between the different kinds of ozone equipment available from numerous vendors. An Ozone Equipment Data Sheet has been...

... such as silica, magnesium silicate as a co-precipitate of magnesium hydroxide and silica, or calcium sulfate. This study evaluated the water chemistry of ozonated cooling systems using an ion association model to predict the scale potential for calcium carbonate, magnesium hydroxide, amorphous silica...

...Abstract Since the mid 1980's ozone as a cooling tower water treatment has evolved from a curiosity to an accepted water treatment practice. The Cooling Tower Institute (CTI) at the 1992 Spring meeting in Monterey, CA devoted one full afternoon to the topic of ozone in cooling water systems. Many...