Abstract
The effect of manure concentration on the growth of the heterogeneous microbial population under batch condition was studied. Four manure concentrations were used in the study. The dehydrogenase activity was used as a measure of the active biomass in the manure. The chemical oxygen demand test was used to measure the change in organic material caused by biological activities. The growth curve of the heterogeneous microbial population in swine manure was essentially similar to that of a pure culture grown batchwise in that it had the four principle phases: lag, exponential growth, stationary, and death. The exponential growth phase followed a diauxic growth pattern. High concentration of manure had an inhibitory effect on the microbial growth. Manure diluted less than 1:3 (manure:water) depressed the specific growth rate of the microbial population.
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Ghaly, A.E., Kok, R. & Ingrahm, J.M. Growth rate determination of heterogeneous microbial population in swine manure. Appl Biochem Biotechnol 22, 59–78 (1989). https://doi.org/10.1007/BF02922697
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DOI: https://doi.org/10.1007/BF02922697