The influence of headspace gas composition on the production of VFA by rumen ciliate protozoa |
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| Authors: | K. Hillman, ,A.G. Williams, D. Lloyd,&dagger |
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| Affiliation: | Department of Chemical and Process Engineering, University of Newcastle upon Tyne;†Department of Microbiology, The Medical School, Framlington Place, Newcastle upon Tyne NE2 4HH, UK |
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| Abstract: | Aerobic bacterial growth was assessed in a simple rectangular vessel with good mixing achieved solely by air flow. Growth became oxygen limited at culture densities below 1·5 mg dry wt/ml, even at maximum air flow and the extent of oxygen-sufficient growth depended on the volume of the culture and the air flow rate. However, the system permitted high retention of biomass growing attached to kiesel-ghur beads, indicating conditions of low shear. The system may be suitable for cheap cultivation of slow-growing micro-organisms and for anaerobic or shear-sensitive cultures. |
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