Authors: Robert Pitt, Uday Khambhammettu, Robert Andoh, Lisa Lemont, Kwabena Osei, and Shirley E. Clark

Abstract: The Up-Flo stormwater filter technology, developed under the US EPA’s Small Business Innovative Research (SBIR) program, incorporates elements of a treatment train approach including screening, sedimentation and high-rate filtration in a compact modular device. The Up-Flo™ Filter is a passive, modular proprietary upflow filtration system that incorporates multiple elements of a treatment train into a single, small-footprint device. The device uses a sedimentation sump and screening system to pre-treat stormwater runoff before it flows up through the filter media where final polishing via filtration occurs. A high-capacity siphoning bypass safeguards against upstream ponding/flooding during high-flow events. The siphon also serves as a floatables baffle to prevent the escape of floatable trash and debris from the Up-Flo™ Filter chamber. The Up-Flo™ Filter during normal operation. The Up-Flo™ Filter has undergone extensive testing, including laboratory and field testing of a prototype and fullscale unit. This paper describes some of these tests, especially relating to the flow treatment capacity of the filter. Comparisons of the different test protocols that are being followed during current full-scale testing are also made.