Production and recovery of propionic and acetic acids in electrodialysis culture of Propionibacterium shermanii |
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| Institution: | 1. Porter School of the Environment and Earth Sciences, Tel Aviv University, Israel;2. Department of Biotechnology, National Institute of Technology, Arunachal Pradesh 791112, India;1. Universidad Estatal de Sonora, Rosales No. 189 Col. Centro C.P. 83100, Hermosillo, Sonora, Mexico;2. CONACYT-Departamento de Investigación en Física, Universidad de Sonora, Apdo, Postal 5-88, 83190 Hermosillo, Sonora, Mexico;3. Departamento de Investigación en Física, Universidad de Sonora, Apdo, Postal 5-88, 83190 Hermosillo, Sonora, Mexico;1. Department of Plant Biology, Uppsala BioCenter, Linnean Center for Plant Biology, Swedish University of Agricultural Sciences, Uppsala, Sweden;2. School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi, India;3. Department of Biological Sciences, P.D. Patel Institute of Applied Sciences, Charotar University of Science and Technology, Changa, India |
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| Abstract: | The simultaneous production and recovery of propionic and acetic acids in cultures of Propionibacterium shermanii were examined while maintaining the concentrations of these acids in the fermentation broth at low values with electrodialysis to alleviate end product inhibition. By this method, maximum cell concentration increased 1.36 fold and the average productivities of propionic and acetic acids increased 1.4 fold and 1.31 fold, respectively, compared to cultures without electrodialysis. The mass ratio of propionic and acetic acids recovered was the same as that for the acids produced by fermentation. The inhibitory effect of propionic acid was more significant on the growth of cells than on the production of propionic acid. Some kinetic equations are presented for simulating the dry cell concentration in the fermentor and the concentrations of propionic and acetic acids in the permeate solution of an electrodialysis culture. |
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