Abstract
Whey is the complex waste of the dairy industry. Despite the fact, that it has numerous applications (like different form of food supplements), its major amount is still handled as waste. The carbohydrate, protein and lactic acid content, as well as the COD and BOD, are sufficiently high warranting disposal as waste resulting in high costs; however, their levels are insufficient for the cost-effective isolation and purification. Most of the numerous reports on whey utilisation focus on lactose utilization, while lactic acid removal is complex, but necessary, particularly in case of sour whey decontamination. According to our best knowledge among the microbial fermentation, the only lactic acid (as carbon source) utilization process is propionic acid fermentation. Propionic acid is an attractive product with a wide application range. In this study, two propionic acid producing microorganisms were investigated in terms of industrial applicability. The propionic acid producing bacteria are generally characterized by anaerobic metabolism (except the pathogenic P. acne); but, for application in a biorefinery, facultative anaerobe behavior is the most appropriate and cost-effective. In this study, the aero-tolerances of Propionibacterium freudenreichii subsp. shermanii and Propionibacterium acidipropionici were examined; their propionic acid-producing properties (yield, concentration, substrate preference, productivity) were compared.
References
[1] Das, M., Raychaudhuri, A., Ghosh, S. K. „Supply Chain of Bioethanol Production from Whey: A Review”. Procedia Environmental Sciences, 35, 2016. 10.1016/j.proenv.2016.07.100Search in Google Scholar
[2] Masotti, F., Cattaneo, S., Stuknytė, M., De Noni, I. „Technological tools to include whey proteins in cheese: Current status and perspectives”. Trends in Food Science & Technology, 2017.10.1016/j.tifs.2017.04.007Search in Google Scholar
[3] Wang, Y. N., Wang, R., Li, W., Tang, C. Y. „Whey recovery using forward osmosis - Evaluating the factors limiting the flux performance”. Journal of Membrane Science, 533, 2017.10.1016/j.memsci.2017.03.047Search in Google Scholar
[4] Gisha, P., Bera, M., Kaur, S. „Bioutilization of whey for ethanol production using yeast isolate”, 4(2), 2014. Retrieved from http://ndpublisher.in/admin/issues/IJFFTV4N2e.pdf10.5958/2277-9396.2014.00012.9Search in Google Scholar
[5] Nishanthi, M., Vasiljevic, T., Chandrapala, J. „Properties of whey proteins obtained from different whey streams”. International Dairy Journal, 66, 2017.10.1016/j.idairyj.2016.11.009Search in Google Scholar
[6] Suwannakham, S., Yang, S. T. „Enhanced propionic acid fermentation by Propionibacterium acidipropionici mutant obtained by adaptation in a fibrous-bed bioreactor”. Biotechnology and Bioengineering, 91(3), 2005.10.1002/bit.20473Search in Google Scholar PubMed
[7] Guan, N., Li, J., Shin, H. dong, Du, G., Chen, J., Liu, L. „Metabolic engineering of acid resistance elements to improve acid resistance and propionic acid production of Propionibacterium jensenii”. Biotechnology and Bioengineering, 113(6), 2016.10.1002/bit.25902Search in Google Scholar PubMed
[8] Wei, P., Lin, M., Wang, Z., Fu, H., Yang, H., Jiang, W., Yang, S. T. „Metabolic engineering of Propionibacterium freudenreichii subsp. shermanii for xylose fermentation”BioresourceTec hnology, 2016.10.1016/j.biortech.2016.07.056Search in Google Scholar PubMed
[9] Wang, Z., Jin, Y., Yang, S. T. „High cell density propionic acidfermentation with an acid tolerant strain of Propionibacterium acidipropionici”. Biotechnology and Bioengineering, 112(3), 2015.10.1002/bit.25466Search in Google Scholar PubMed
[10] Jin, Z., Yang, S. T. „Extractive fermentation for enhanced propionic acid production from lactose by Propionibacterium acidipropionici”. Biotechnology Progress, 14(3), 1998.10.1021/bp980026iSearch in Google Scholar PubMed
[11] Kumar, S., Babu, B. V. „Propionic Acid Production viaFermentation Route using Renewable Sources”. (n.d.) Search in Google Scholar
[12] Liu, Z., Ge, Y., Xu, J., Gao, C., Ma, C., Xu, P. „Efficient production of propionic acid through high density culture with recycling cells of Propionibacterium acidipropionici”. Bioresource Technology, 216, 2016.10.1016/j.biortech.2016.06.023Search in Google Scholar PubMed
[13] Baumann, I., Westermann, P. „Microbial Production of Short Chain Fatty Acids from Lignocellulosic Biomass: Current Processes and Market”. BioMed Research International, 2016.10.1155/2016/8469357Search in Google Scholar PubMed PubMed Central
[14] Liu, L., Guan, N., Zhu, G., Li, J., Shin, H., Du, G. „Pathwayengineering of Propioni bacterium jensenii for improved production of propionic acid”. Nature Publishing Group, 6(19963), 2016.10.1038/srep19963Search in Google Scholar PubMed PubMed Central
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