Browsing by Author "Oliver, Laura"
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Item Producing Omega-3 Polyunsaturated Fatty Acids: A Review of Sustainable Sources and Future Trends for the EPA and DHA Market(Multidisciplinary Digital Publishing Institute (MDPI), 2020-12-16) Oliver, Laura; Dietrich, Thomas; Marañón, Izaskun; Villarán, Maria Carmen; Barrio, Ramón J.Omega-3 polyunsaturated fatty acids (Omega-3 PUFA) are recognized as being essential compounds for human nutrition and health. The human body generates only low levels of Omega-3 PUFA. Conventional sources of Omega-3 PUFA are from marine origin. However, the global growth of population combined with a better consumer understanding about healthy nutrition leads to the fact that traditional sources are exhausted and therefore not enough to satisfy the demand of Omega-3 PUFA for human diet as well as aquaculture. Microalgae cultivated under heterotrophic conditions is increasingly recognized as a suitable technology for the production of the Omega-3 PUFA. The high cost of using glucose as main carbon source for cultivation is the main challenge to establish economical feasible production processes. The latest relevant studies provide alternative pathways for Omega-3 PUFA production. As preliminary results show, volatile fatty acids (VFA) recovered from waste stream could be a good alternative to the use of glucose as carbon source in microalgae cultivation. The purpose of this paper is to highlight the actual situation of Omega-3 PUFA production, sources and market request to provide a summary on sustainable sources that are being investigated as well as present and future market trends in Omega-3 market.Item Production of Docosahexaenoic Acid and Odd-Chain Fatty Acids by Microalgae Schizochytrium limacinum Grown on Waste-Derived Volatile Fatty Acids(2022-04-14) Oliver, Laura; Fernández-de-Castro, Laura; Dietrich, Thomas; Villaran, Maria Carmen; Barrio, Ramón J.; Tecnalia Research & Innovation; Alimentación SostenibleHeterotrophic microalgae are recognized as a source of bioactive compounds. However, there are still some drawbacks for their use at an industrial scale associated with the high cost of glucose, the main carbon source in heterotrophic cultures. In recent years, significant efforts have been made to investigate more sustainable carbon sources to produce biomass. In this study, the capacity of Schizochytrium limacinum to grow on waste-derived volatile fatty acids and the effect that their use produces on biomass and fatty acids profiles were investigated. Acetic, propionic, butyric, valeric and caproic acid were evaluated independently, as well as in a synthetic mixture (VFA). The use of acetic and butyric resulted in a good biomass productivity, while the use of valeric and propionic acid resulted in higher content of odd-chain fatty acids (OCFA), increasingly investigated due to their potential benefits for human health. The use of industrial waste-derived VFA as a potential carbon source was validated through the utilization of biowaste derived effluents from a volatile fatty acid platform. The biomass produced was of 18.5 g/L, 54.0% lipids, 46.3% docosahexaenoic acid (DHA) and 25.0% OCFA, concluding that waste derived VFA can produce DHA and OCFA in a suitable ratio of DHA/OCFA with potential industrial applications.Item Towards a Circular Bioeconomy. VOLATILE FATTY ACID PLATFORM FOR BIOWASTE RECYCLING(2020) Michels, Jochen; Mocking, Tijs; Sellis, Ido; Meerburg, Francis; Bauer, Csaba; Pais, Celia; Magielse, Peter; Ferreira, Vasco; Gonzalez, Elisabeth; Stramarkou, Marina; Carolas, Ana; Rusu, Alexandru; Hiessl, Sebastian; Dietrich, Thomas; Velghe, Filip; Pop, Bianca; Peral, Carlota; De Wilde, Fabian; Spit, Gerben; Sommer Ferreira, Bruno; Wiedemann, Adelheid; Neureiter, Markus; Pierrard, Marie-Aline; [Unknown], Burgstaller; Sampaio, Paula; Oliver, Laura; Topakas, Evangelos; Chalima, Angelina; Fernández de Castro, Laura; San Vicente, Leire; Oikonomopoulou, Vasiliki; Boukouvalas, Christos; Laina, Konstantina; Farahbakhsh, Siavash; Santamaría, Amaia; San José, Javier; Van Meensel, Jef; Snellinx, Stien; Belderbos, Edward; Mertens, Anouk; Villarán, Maria Carmen; Tecnalia Research & InnovationResources in general are not infinitely available, and also renewable resources if consumed outside their normal replacement cycles become scarce. Therefore, the establishment of a circular bioeconomy must respect natural systems and replacement cycles of organic carbon thereby reducing environmental pressure of human consumption. Upcycling of side and biowaste streams towards added value compounds represents hereby a critical aspect reducing land system change and fertilizer use for biomass supply for the bioeconomy. The development of a Volatile Fatty Acids Platform (VFAP) represents an important cornerstone for the upcycling of heterogenous municipal biowaste streams.Item Utilization of Volatile Fatty Acids from Microalgae for the Production of High Added Value Compounds(2017-10-15) Chalima, Angelina; Oliver, Laura; Fernández de Castro, Laura; Karnaouri, Anthi; Dietrich, Thomas; Topakas, Evangelos; Tecnalia Research & Innovation; Alimentación SostenibleVolatile Fatty Acids (VFA) are small organic compounds that have attracted much attention lately, due to their use as a carbon source for microorganisms involved in the production of bioactive compounds, biodegradable materials and energy. Low cost production of VFA from different types of waste streams can occur via dark fermentation, offering a promising approach for the production of biofuels and biochemicals with simultaneous reduction of waste volume. VFA can be subsequently utilized in fermentation processes and efficiently transformed into bioactive compounds that can be used in the food and nutraceutical industry for the development of functional foods with scientifically sustained claims. Microalgae are oleaginous microorganisms that are able to grow in heterotrophic cultures supported by VFA as a carbon source and accumulate high amounts of valuable products, such as omega-3 fatty acids and exopolysaccharides. This article reviews the different types of waste streams in concert with their potential to produce VFA, the possible factors that affect the VFA production process and the utilization of the resulting VFA in microalgae fermentation processes. The biology of VFA utilization, the potential products and the downstream processes are discussed in detail.