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      

Digester Evaluation
Author: Robert A. Witzgall, Gary J. Volpe, Roger T. Haug, Wayne A. Lawson, Wendell H. Kido
Date: 5/198
Reprinted from Water Environment and Technology, May 1998

Submerged fixed-cover design, introduced in 1993, gives conventional-shaped digesters the same key features that have made egg-shaped digesters successful in controlling digester scum and debris accumulation. Specifically, both designs minimize the liquid-solids surface by submerging the cover so the liquid level is in the gas dome and digested solids are continuously removed from the liquid surface via an overflow standpipe. This limits the liquid surface area and the tendency for scum and debris buildup. Digested solids also are removed continuously from the steep-sloped bottom of the digester to prevent grit accumulation.

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.