You are here:
VERIFICATION OF HIGH-RATE SEPARATION DEVICES UNDER THE WET-WEATHER FLOW TECHNOLOGIES PILOT - ETV PROGRAM
Citation:
Hackett, D. VERIFICATION OF HIGH-RATE SEPARATION DEVICES UNDER THE WET-WEATHER FLOW TECHNOLOGIES PILOT - ETV PROGRAM. Presented at 2001 International Public Works Congress & Distribution Conference, Philadelphia, PA, 9/9-12/2001.
Description:
This paper presents performance verification data on two types of high-rate separation devices utilized for solids removal: Vortex separation devices (a class of physical treatment technologies that use cylindrical chambers to create centrifugal forces that separate settleable solids from wet-weather flow (WWF), and; Chemically Enhanced High-Rate Separation (CEHRS) devices (a class of physical-chemical treatment technologies that use coagulants to affect particulate removal). The performance of these devices is being evaluated under EPA's ETV Program to verify the performance characteristics of innovative, commercial-ready environmental technologies through the evaluation of objective and quality-assured data. WWF technologies verification was selected as one of the priority area to pursue under the ETV Program, based on the need to reduce adverse impacts that combined sewer overflow (CSO), sanitary sewer overflow (SSO), and urban stormwater runoff can have on surface water quality. One of the initial technology areas focused on is high-rate physical/chemical treatment, which includes both CEHRS devices and vortex separation devices. This high priority is due to the numerous advantages offered by these physical/chemical devices, including: significant reduction in the solids content of WWF; relatively low cost compared to other alternatives such as conventional slower rate treatment and larger storage tank volume; and limited space requirements due to small footprint making them highly suitable for retrofit applications in existing municipal wastewater plants.