Bioproduction of carotenoid compounds using two-phase olive mill waste as the substrate |
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| Affiliation: | 1. Laboratoire de Photovoltaïque, Centre de Recherches et des Technologies de l’Energie, Technopole de Borj-Cédria, BP 95, Hammam-Lif, 2050 Tunis, Université de Tunis El Manar, Tunisia;2. CIRIMAT, CNRS, INPT, Universite de Toulouse, 118, Route de Narbonne, 31062 Toulouse Cedex 9, France;1. School of Bioscience and Bioengineering, South China University of Technology, Guangzhou Higher Education Mega Center, Panyu, Guangzhou 510006, People’s Republic of China;2. College of Life and Geographic Sciences, Kashgar University, Kashgar 844000, China;3. The Key Laboratory of Ecology and Biological Resources in Yarkand Oasis at Colleges & Universities under the Department of Education of Xinjiang Uygur Autonomous Region, Kashgar University, Kashgar 844000, China;1. Biomedical Sciences and Biochemistry, Research School of Biology, Australian National University, Canberra 0200, ACT, Australia;2. Discipline of Physiology, School of Medical Sciences and Bosch Institute, University of Sydney, Sydney 2006, NSW, Australia;1. School of Materials Science & Engineering, Anhui University of Technology, Ma''anshan, 243002, PR China;2. School of Materials Science & Engineering, University of Jinan, Jinan, 250022, PR China;3. College of Material Science & Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing, 210016, PR China;4. School of Mathematics and Physics, Anhui University of Technology, Ma''anshan, 243002, PR China |
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| Abstract: | The olive oil production process by the two-phase centrifugal system generates a waste named “alperujo”, which has a high percentage of water (65%) and contains phenolic compounds. These compounds are phytotoxic and pollute the soil and waterways, hindering the disposal of the alperujo. However, a diverse microbiota with biotechnological applications, such as the carotene-producing bacteria Microbacterium sp., was isolated from these wastes. The aim of this work was to evaluate the ability of an aqueous extract from alperujo (AE) to sustain the growth and carotene production of Microbacterium sp. in an attempt to valorize this waste. An inverse relationship between Microbacterium sp. growth and carotene production and AE concentration was observed. The bacterial growth was accompanied by a decrease in nitrogen, total sugar and glucose levels. In addition, total polyphenol content decreased, whereas pH of the AE increased. These results demonstrate that AE can be used as a substrate for carotene production, being an alternative strategy for alperujo valorization. |
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| Keywords: | Carotenes Waste valorization Microbial growth Total polyphenols |
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