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      

Discussion of: Nitrification Performance of a Pilot Scale Trickling Filter
Author: Denny S. Parker, Bruce E. Logan
Date: 11/90
Reprinted from Research Journal Water Pollution Control Federation, November/December 1990

There have been several extensive studies during the past few years to establish general design criteria of nitrifying trickling filters (NTFs).1-3 Several conclusions reached by Gullicks and Cleasby, however, appear to dispute these criteria. For example, Gullicks and Cleasby imply that influent and bulk dissolved oxygen concentrations are more important than organic loads. In addition, they neglect more recent work emphasizing the critical role of thick biofilms in maintaining high nitrification rates in NTFs.3 We are concerned that casual review and acceptance of their study could lead to less efficient design of NTFs and believe several aspects of their analysis must be critically examined.

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.