You are here:
PILOT-SCALE EVALUATION FOR THE CONTAINMENT, TREATMENT, AND DECONTAMINATION OF SELECTED MATERIALS USED IN THE WATER DISTRIBUTION SYSTEM
Citation:
DOSANI, M. A., R. KRISHNAN, A. ZAFFIRO, H. PIAO, AND P. RANDALL. PILOT-SCALE EVALUATION FOR THE CONTAINMENT, TREATMENT, AND DECONTAMINATION OF SELECTED MATERIALS USED IN THE WATER DISTRIBUTION SYSTEM. Presented at Shaw E&I Symposium, Orlando, FL, April 14 - 16, 2005.
Description:
The safety and security of water supplies has come under reassessment in the past year. Issues ranging from public safety and health, ecological, and national security are under consideration. The terrorist attacks on the United States on September 11, 2001 and the subsequent delivery of Anthrax-contaminated letters through the mail raised concerns about protecting U.S. citizens and the nation's critical infrastructure. EPA has developed stategies to deter, detect, treat, and respond to physical, biological, chemical, and radiological on U.S. water supplies. One of the more important roles of EPA in dealing with a contamination threat is how to treat, contain, and dispose of contaminated water. Furthermore, the physical infrastructure of the water distribution system will require decontamination before it is reused. A series of bench- and pilot-scale tests (i.e., hydraulic and flow dynamics, contaminant removal efficiency, etc.) were conducted using the simulated distribution system (designed and fabricated by Shaw E&I, Cincinnati) located at the T&E Facility. Shaw has identified a number of potential contaminants which were injected into the pipe-loop system to determine the effects of concentration, flow rate, pipe material, and media (such as biofilm, or carrier fluid) on contaminant adherence to the pipe surfaces. Shaw will then select appropriate decontamination technologies (such as, flushing, air scouring, pigging, enzyme treatment, and shock chlorination) to determine their effectiveness to decontaminate the pipe-loop system. These studies will result in the development of documents, protocols and technical assistance procedures for the proper contaminant, treatment and decontamination of any material that might result in the deliberate or acidental contamination of U.S. water supplies or water supply systems.