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Growth media in anaerobic fermentative processes: The underestimated potential of thermophilic fermentation and anaerobic digestion
Biotechnology Advances ( IF 16.0 ) Pub Date : 2017-09-01 , DOI: 10.1016/j.biotechadv.2017.08.004
A.T.W.M. Hendriks , J.B. van Lier , M.K. de Kreuk

Fermentation and anaerobic digestion of organic waste and wastewater is broadly studied and applied. Despite widely available results and data for these processes, comparison of the generated results in literature is difficult. Not only due to the used variety of process conditions, but also because of the many different growth media that are used. Composition of growth media can influence biogas production (rates) and lead to process instability during anaerobic digestion. To be able to compare results of the different studies reported, and to ensure nutrient limitation is not influencing observations ascribed to process dynamics and/or reaction kinetics, a standard protocol for creating a defined growth medium for anaerobic digestion and mixed culture fermentation is proposed. This paper explains the role(s) of the different macro- and micronutrients, as well as the choices for a growth medium formulation strategy. In addition, the differences in nutrient requirements between mesophilic and thermophilic systems are discussed as well as the importance of specific trace metals regarding specific conversion routes and the possible supplementary requirement of vitamins. The paper will also give some insight into the bio-availability and toxicity of trace metals. A remarkable finding is that mesophilic and thermophilic enzymes are quite comparable at their optimum temperatures. This has consequences for the trace metal requirements of thermophiles under certain conditions. Under non-limiting conditions, the trace metal requirement of thermophilic systems is about 3 times higher than for mesophilic systems.



中文翻译:

厌氧发酵过程中的生长培养基:嗜热发酵和厌氧消化的潜力被低估了

对有机废物和废水的发酵和厌氧消化进行了广泛的研究和应用。尽管获得了这些过程的广泛结果和数据,但很难在文献中比较所产生的结果。不仅由于所使用的各种工艺条件,还由于所使用的许多不同的生长培养基。生长培养基的组成会影响沼气的产生(速率),并导致厌氧消化过程中的过程不稳定。为了能够比较报道的不同研究的结果,并确保营养物质的限制不会影响过程动力学和/或反应动力学的观察结果,提出了一种标准方案,用于创建定义的厌氧消化和混合培养发酵培养基。本文解释了不同的大量和微量营养素的作用,以及生长培养基配方策略的选择。此外,还讨论了中温和嗜热系统之间营养需求的差异,以及特定痕量金属对特定转化途径的重要性以及对维生素的可能补充需求。本文还将对痕量金属的生物利用度和毒性提供一些见识。一个显着的发现是,嗜温和嗜热酶在其最佳温度下具有相当的可比性。在某些条件下,这会对嗜热菌的痕量金属需求产生影响。在非限制性条件下,嗜热系统的痕量金属需求比嗜温系统的痕量金属需求高约3倍。以及生长培养基配方策略的选择。此外,还讨论了嗜温和嗜热系统之间营养需求的差异,以及特定痕量金属对特定转化途径的重要性以及对维生素的可能补充需求。本文还将对痕量金属的生物利用度和毒性提供一些见识。一个显着的发现是,嗜温和嗜热酶在其最佳温度下具有相当的可比性。在某些条件下,这会对嗜热菌的痕量金属需求产生影响。在非限制性条件下,嗜热系统的痕量金属需求比嗜温系统的痕量金属需求高约3倍。以及生长培养基配方策略的选择。此外,还讨论了嗜温和嗜热系统之间营养需求的差异,以及特定痕量金属对特定转化途径的重要性以及对维生素的可能补充需求。本文还将对痕量金属的生物利用度和毒性提供一些见识。一个显着的发现是,嗜温和嗜热酶在其最佳温度下具有相当的可比性。在某些条件下,这会对嗜热菌的痕量金属需求产生影响。在非限制性条件下,嗜热系统的痕量金属需求比嗜温系统的痕量金属需求高约3倍。讨论了中温和嗜热系统之间营养需求的差异,以及特定痕量金属在特定转化途径和可能补充维生素方面的重要性。本文还将对痕量金属的生物利用度和毒性提供一些见识。一个显着的发现是,嗜温和嗜热酶在其最佳温度下具有相当的可比性。在某些条件下,这会对嗜热菌的痕量金属需求产生影响。在非限制性条件下,嗜热系统的痕量金属需求比嗜温系统的痕量金属需求高约3倍。讨论了嗜温和嗜热系统之间营养需求的差异,以及特定痕量金属在特定转化途径和可能补充维生素方面的重要性。本文还将对痕量金属的生物利用度和毒性提供一些见识。一个显着的发现是,嗜温和嗜热酶在其最佳温度下具有相当的可比性。在某些条件下,这会对嗜热菌的痕量金属需求产生影响。在非限制性条件下,嗜热系统的痕量金属需求比嗜温系统的痕量金属需求高约3倍。

更新日期:2017-09-01
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