title: Treatment shaft for combined sewer overflow detention.
abstract: A deep, large-diameter underground shaft to provide detention storage for combined sewer overflow control may be advantageous in urban environments, where space limitations require solutions with a small footprint. An underflow baffle wall is provided at the center of the treatment shaft to prevent short-circuiting of the flow. An additional objective is to maintain low headlosses through the structure. A physical model study was conducted to determine the effect of the bottom elevation of the baffle wall on the headloss and breakthrough curve for dye injected to the inflow. It was found that there is a considerable range of elevations for which the structure behaves acceptably in providing adequate contact time for disinfectant while maintaining small headlosses.
authors.affiliation: Civil and Environmental Engineering Department, University of Michigan, Ann Arbor, Michigan 48109-2125, USA. sjwright@umich.edu
authors.forename: Steven J
authors.initials: SJ
authors.lastname: Wright
authors.forename: Saad
authors.initials: S
authors.lastname: Ghalib
authors.forename: Aziz
authors.initials: A
authors.lastname: Eloubaidy
mesh_terms: D005160:Facility Design and Construction; D005456:Fluorescent Dyes; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000379:methods*; D014867:Water / Q000737:chemistry; D014872:Water Movements
chemical_list: D005456:Fluorescent Dyes; D012722:Sewage; D014867:Water