在微藻-细菌工艺中优化沼气升级过程时，沼气流量对生物质组成的影响。
Influence of biogas flow rate on biomass composition during the optimization of biogas upgrading in microalgal-bacterial processes.
机构信息
Department of Chemical Engineering and Environmental Technology, University of Valladolid , Dr. Mergelina s/n, Valladolid 47005, Spain.
出版信息
Environ Sci Technol. 2015 Mar 3;49(5):3228-36. doi: 10.1021/es5056116. Epub 2015 Feb 12.
The influence of biogas flow rate (0, 0.3, 0.6, and 1.2 m(3) m(-2) h(-1)) on the elemental and macromolecular composition of the algal-bacterial biomass produced from biogas upgrading in a 180 L photobioreactor interconnected to a 2.5 L external bubbled absorption column was investigated using diluted anaerobically digested vinasse as cultivation medium. The influence of the external liquid recirculation/biogas ratio (0.5 < L/G < 67) on the removal of CO2 and H2S, and on the concentrations of O2 and N2 in the upgraded biogas, was also evaluated. A L/G ratio of 10 was considered optimum to support CO2 and H2S removals of 80% and 100%, respectively, at all biogas flow rates tested. Biomass productivity increased at increasing biogas flow rate, with a maximum of 12 ± 1 g m(-2) d(-1) at 1.2 m(3) m(-2) h(-1), while the C, N, and P biomass content remained constant at 49 ± 2%, 9 ± 0%, and 1 ± 0%, respectively, over the 175 days of experimentation. The high carbohydrate contents (60-76%), inversely correlated to biogas flow rates, would allow the production of ≈100 L of ethanol per 1000 m(3) of biogas upgraded under a biorefinery process approach.
在 180 L 光生物反应器中，用稀释的厌氧消化酒糟作为培养介质，研究了沼气升级过程中沼气流量（0、0.3、0.6 和 1.2 m³ m⁻² h⁻¹）对生物气升级中藻类-细菌生物质的元素和高分子组成的影响。还评估了外部液体再循环/沼气比（0.5 < L/G < 67）对 CO2 和 H2S 的去除以及升级沼气中 O2 和 N2 浓度的影响。L/G 比为 10 被认为是最适合在所有测试的沼气流量下分别支持 80%和 100%的 CO2 和 H2S 去除的最佳值。随着沼气流量的增加，生物量生产力增加，在 1.2 m³ m⁻² h⁻¹时达到 12 ± 1 g m⁻² d⁻¹的最大值，而 C、N 和 P 生物质含量在 175 天的实验过程中分别保持在 49 ± 2%、9 ± 0%和 1 ± 0%不变。高碳水化合物含量（60-76%）与沼气流量成反比，这将允许在生物炼制过程方法下，每 1000 m³升级的沼气生产约 100 L 的乙醇。
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