Brown and Caldwell Home Page

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      

Cost-Effective Design and Operation of Activated Sludge Aeration Systems using Process Modeling
Author: Linda K. Sawyer, A. Ron Appleton, Jr., Adam Ross, Lloyd Slezak, Jim Bartlett, and Tim Grillo
Date: 10/08
Preprint WEFTEC ’08, Chicago, IL, October 18-22, 2008

A process simulator, with an integrated aeration model, can be used to optimize diffuser density, test alternate control strategies, and reduce energy use. Dynamic simulation using a calibrated simulator was used at the Union Sanitary District Alvarado Wastewater Treatment Plant to estimate ideal aeration air demands – with ideally optimized aeration system control – throughout a typical year. The results were used to recommend diffuser density changes along the plug-flow tank and to rationally select the number of control zones based upon capital, operations, and maintenance costs of additional dissolved oxygen probes and air flow control valves. The simulated frequency of air demands can be used for efficient blower sizing.

This library contains published materials for which copyrights may be owned by entities other than Brown and Caldwell, but which are stored for limited uses by BC employees. Technical papers authored by BC employees generally may be printed and shared electronically with clients and prospective clients outside BC. Technical papers cannot be sold, and technical papers shared outside BC must have proper attribution of the original sponsoring organization or conference where the paper was presented. This attribution is embedded in each technical paper file when it is loaded into this library. Published articles from magazines or trade journals which are stored in this library are FOR INTERNAL USE ONLY and SHOULD NOT be distributed to clients or others outside BC, without express permission of the copyright owner. For questions regarding copyrights associated with any document in this library, or questions regarding copyrights in general, contact the Legal Department.