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Author      Title/Abstract      

02 Limitations in CH4 and NH4 + Utilizing Biofilms
Author: Denny S. Parker, Bruce E. Logan, R. G. Arnold
Date: 7/890
Presented at the ASCE Conference on Environmental Engineering, July 8-11,1990

Oxygen gradients can rapidly develop in fluid films covering biofilm in trickling filters. We use a computer model to calculate the maximum oxygen flux to a biofilm, and show that the maximum ammonia removal rate in nitrifying trickling filters (NTFs) is within the range expected from oxygen-limited transport. Based on our experience with NTFs, we discuss the implications of gas-transport limitations for methanotrophic biofilms in plastic media trickling filters.