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عنوان فارسی مقاله:
تجزیه و تحلیل فرآیند مبتنی بر مدل تولید هتروتروف-اتوتروف پلی (3-هیدروکسی بوتیرات) (PHB)
عنوان انگلیسی مقاله:
Model-based process analysis of heterotrophic-autotrophic poly(3-hydroxybutyrate) (PHB) production
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Poly(3-hydroxybutyrate) (PHB) is an intracellular storage material that is synthesized by a number of microorganisms and has become of considerable industrial interest and of environmental importance as a biodegradable and bio-based plastic. Although PHB is regarded as an effective substitute for conventional plastics, commercialization of this biopolymer is hampered by its high production cost compared to other (bio)polymers [1]. PHB is mostly produced through pure-culture fermentation, in which a cell growth phase under nutrient-sufficient conditions is followed by a PHB production phase triggered by applying nutrient (typically ammonium-nitrogen)limitation, making up a two-phase process. Most often heterotrophic conditions are applied during both phases, employing a wide variety of organic substrates, either pure substrates such as glucose, sucrose, starch, cellulose, or waste substrates such as molasses, whey, waste glycerol etc [2–5]. However, also autotrophic PHB production is possible by applying bacteria which use carbon dioxide (CO2) as a carbon source and hydrogen (H2) as an energy source [6–8]. Autotrophic PHB production is particularly interesting because it produces a valuable product and at the same time reduces the concentration of the greenhouse gas CO2, in this way contributing to climate change mitigation. However, autotrophic PHB production is limited by the fact that the oxygen (O2) concentration in the gas phase needs to be kept below the lower level of explosion, i.e. between 6 and 6.9% O2 by volume in the gas mixture of CO2, H2, and O2 [9]. The O2 transfer rate becomes very low under this condition, which seriously hampers the cell growth because of O2 limitation [10]. As a result, autotrophic–autotrophic PHB production, i.e. combining autotrophic growth (phase 1) and autotrophic PHB production (phase 2) cannot be realized in an economically viable way. To overcome this limitation, a new cultivation method, namely heterotrophic-autotrophic PHB production, was proposed by Tanaka and Ishizaki, [10]. This method consists of heterotrophic growth on organic substrate (phase 1), maintaining nutrientsufficient conditions, followed by autotrophic PHB production on CO2, H2, and O2 while applying ammonium-nitrogen limitation (phase 2). In this way, a high PHB concentration can be realized under safe operating conditions. Cupriavidus necator (formerly known as Ralstonia eutropha, Alcaligenes eutrophus, and Wautersia eutropha) is a well-known and well-studied hydrogen oxidizing bacterium that is able to grow
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کلمات کلیدی:
Eveline Volcke (0000-0002-7664-7033) - ORCID | Connecting ... orcid.org/0000-0002-7664-7033 Model-based process analysis of heterotrophic-autotrophic poly(3-hydroxybutyrate) (PHB) production Biochemical Engineering Journal. 2016-10 | journal-article. [PDF]Autotrophic and heterotrophic metabolism of ... - Biogeosciences www.biogeosciences.net/7/3491/2010/bg-7-3491-2010.pdf by O Bonilla-Findji - 2010 - Cited by 22 - Related articles Nov 8, 2010 - tion of autotrophic and heterotrophic ecosystem processes. A typical spring .... liquid nitrogen and stored at −80 ◦C pending analysis. The abundance ... prefiltration of the water through a 0.8µm pore size poly- carbonate filter ... [PDF]PHB - Repositorio Digital Senescyt repositorio.educacionsuperior.gob.ec/bitstream/28000/.../1/T-SENESCYT-00650.pdf by PS Cerón Chafla - 2014 - Related articles analysis) to evaluate the effect of process variables, such as oxygen fraction in the gas ... heterotrophic-autotrophic PHB production process and to predict its outcome ... Among PHAs, the most studied one is polyhydroxybutyrate (PHB), for the ... 8 - NDSL 논문 - 간략목록 www.ndsl.kr/.../articleSearchResultList.do?... - Translate this page [해외논문] PhaQ, a new class of poly-beta-hydroxybutyrate (phb)-responsive ...... process analysis of heterotrophic-autotrophic poly(3-hydroxybutyrate) (PHB) ... Two-stage (photoautotrophy and heterotrophy) cultivation enables ... https://www.nature.com › Scientific Reports › Articles by T Monshupanee - 2016 - Cited by 1 - Related articles Nov 15, 2016 - Sustainable production of bioplastics by heterotrophic microbes has been ... efficient production of bioplastic poly-3-hydroxybutyrate in auto-sedimenting cyanobacterium ... w/v) of the organic substrate used in the production process1,2,3,4,5,6. ... In contrast, the unicellular cyanobacterium Synechocystis sp.
