Brown and Caldwell Home Page
Technical Papers RECENT PAPERS    ALL PAPERS      LOG IN

Brown and Caldwell engineers and scientists are technical and thought leaders in the environmental sector. Meet the people who have been advancing innovation for more than 70 years.
Author      Title/Abstract      

Optimizing Primary Sedimentation and Wet Weather Flow Treatment Using CFD Modeling
Author: Don Esping, Harry Shaposka, Eric Wahlberg, J. Ifft and J. Alex McCorquodale
Date: 10/12
WEFTEC 2012, New Orleans, LA, Sept. 29 – Oct. 3, 2012

Computational fluid dynamic (CFD) modeling was used to evaluate primary settling tank (PST) performance and a novel wet weather chemically enhanced high rate treatment (CE-HRT) tank configuration. Total suspended solids removal performance of three PST configurations under dry and wet weather conditions were evaluated using various baffling, launder, and sludge removal improvements. CFD modeling of wet weather treatment tanks with chemically treated raw influent showed CE-HRT can meet project requirements for wet weather flow discharges. The use of a combination of full-scale and bench-scale testing was employed to extend the application of the model to chemically treated influent.