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      

Rerating the Central Valley TF/SC Facility
Author: Jeffrey Slapper, Denny S. Parker, Reed N. Fisher, William Fox
Date: 9/292
Presented at WEF 65th Annual Conference, New Orleans, Louisiana, September 20-24,1992

This paper presents a case history of a "rating study" that was performed at the Central Valley Water Reclamation Facility (CVWRF). The CVWRF utilizes the Trickling Filter/Solids Contact (TF/SC) treatment process and, since startup in 1988, has provided an average final effluent quality of 8 mg/l TSS and 5 mg/l CBOD. The objectives of the study were to (1) verify appropriateness of the original design parameters, based on both operational experience and process unit testing; (2) if appropriate, establish higher parameters consistent with the plant's effluent requirements; and (3) provide a capital improvements staging plan based on actual¾not theoretical¾criteria. The results of the rating study indicated that the liquid stream unit process performance exceeded expectations. The following revisions to operating criteria were considered justified: Increase of rated plant capacity from 62 mgd to 75 mgd, primary clarifier overflow rate increase of 20 percent, trickling filter organic loading rate increase of 8 percent, and secondary clarifier overflow rate increase of 50 percent.

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.