91ST Avenue Wastewater Treatment Plant Chlorine Conversion Project
Abstract:A chlorine system conversion project at the 91st Avenue Wastewater Treatment Plant was initiated to convert the bulk chlorine system which consisted of four 20-ton permanent storage tanks and two 17-ton mobile truck trailer mounted system to a multiple one-ton cylinder system. The project also included the replacement of plastic pipe used for the conveyance of both chlorine gas (vacuum) and chlorine solution.
In recent years, municipal, industrial, and private utility users of chlorine disinfection systems have encountered a condition known as “embrittlement” which is characterized by fractures in the pipe walls that could eventually result in failures in PVC/CPVC (thermoplastics) piping systems. Because of this problem and the potential for premature aging, the chlorine industry as a whole has expressed the opinion that thermoplastic pipes used for the conveyance of chlorine gas or chlorine in solution may require more frequent replacement; perhaps as often as every 10 years.
The City of Phoenix as the facility operations agency, having safety as a high priority, commissioned CSA Engineering to study the problem and provide a design for a plant-wide chlorine pipe replacement project. With the prospect of a disinfection piping system having a limited life cycle and high piping replacement costs, CSA proposed a study to determine degradation effects of thermoplastic material in an aggressive elemental chlorine environment.
Document Type: Research Article
Publication date: 2005-01-01
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites