Effect of pH on growth of mixed cultures in batch reactor

Biotechnology and Bioengineering
A LallaiC Mastinu


This work has studied the effect of pH on specific growth rate mu, yield factor Y, and specific substrate consumption rate U for two mixed microbial populations (sludge A and B) in a batch reactor with a limiting substrate (phenol). The mathematical analysis of mu and U as a function of pH has been applied not only to the results of the present work but also to other published data. On the basis of the results obtained, the following remarks can be made: (a) The effect of pH on bacterial activity differed for the two sludges; (b) variations in pH of one unit more or less than optimum pH can give rise to appreciable variations in mu and U; and (c) with regard to the mixed populations used in this study, the mu or U and pH data for the range investigated can be suitably described by a parabolic relation.


Mar 1, 1982·Bulletin of Environmental Contamination and Toxicology·J A Gooch, M K Hamdy


Jul 26, 2000·Biochemical Engineering Journal·A A Monteiro1A E Rodrigues
Mar 10, 2019·Brazilian Journal of Microbiology : [publication of the Brazilian Society for Microbiology]·Henrique Susumu TanakaNelson Barros Colauto
Mar 3, 2020·Journal of Applied Microbiology·S A YounisH N Nassar

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