The U.S. Environmental Protection Agency’s (EPA) Water Infrastructure Resiliency and Finance Center, in collaboration with the...
The American Water Works Association Research Foundation (AWWARF) makes available copies of their completed research projects. These reports may be purchased by writing to AWWARF, 6666 West Quincy Ave., Denver, CO 80235; by calling 303-347-6121; by sending a fax to 303-730-0851; or by sending e-mail to [email protected] following is a synopsis of a report prepared by Larry D. DeMers and Robert C. Renner, Process Applications Inc. on alternative disinfection technologies for small systems (order Number: 90619). Source: AWWARF website.
Most of the research and application of these technologies has been directed toward medium to large systems, even though many small systems will be faced with the same disinfection requirements.
Chapter 2: The information presented in chapter 2 is intended to assist small systems with the evaluation of their current disinfection practices. Conducting an evaluation of this type will assist small systems in determining what effect the new regulations will have on their existing facilities. If changes in operational practices and minor modifications can be made to an existing system to achieve compliance with new regulations, this evaluation approach is typically recommended.
Chapter 3: Chapter 3 presents background, application, design, and operational information on the use of ozone in small systems. Of the three technologies presented in this report, ozone is the most complex alternative to design and use. Although many choices exist when selecting an ozone system, simple, reliable systems are emphasized in this chapter.
Chapter 4: The use of chlorine dioxide for small-system applications is presented in chapter 4. Chlorine dioxide equipment is similar to conventional chlorine equipment; however, operational requirements are more complex. Pending regulations may have an effect on the use of chlorine dioxide for drinking water disinfection. The uncertainty associated with these regulations is emphasized.
Chapter 5 : Ultraviolet radiation has the simplest design and operational requirements of the three alternative technologies discussed in this report. Chapter 5 presents background, application, design, and operational information on ultraviolet radiation for small drinking water systems. Ultraviolet radiation is a relatively new technology for drinking water disinfection in North America. Its use may be limited to groundwater applications because of its marginal effectiveness against protozoan cysts, such as Giardia.