Department of Chemical Engineering and Environmental Technology, University of Valladolid, Dr. Mergelina s/n., Valladolid 47011, Spain; Institute of Sustainable Processes, University of Valladolid, 47011 Valladolid, Spain.
Department of Chemical Engineering and Environmental Technology, University of Valladolid, Dr. Mergelina s/n., Valladolid 47011, Spain; Departamento de Ingeniería Química y Ambiental, Universidad Técnica Federico Santa María, Av. España, 1680 Valparaíso, Chile.
Bioresour Technol. 2020 Jul;307:123207. doi: 10.1016/j.biortech.2020.123207. Epub 2020 Mar 20.
The validation of a control strategy for biogas upgrading via light-driven CO consumption by microalgae and HS oxidation by oxidizing bacteria using the oxygen photosynthetically generated was performed in a semi-industrial scale (9.6 m) photobioreactor. The control system was able to support CO concentrations lower than 2% with O contents ≤ 1% regardless of the pH in the cultivation broth (ranging from 9.05 to 9.50). Moreover, the control system was efficient to cope with variations in biogas flowrate from 143 to 420 L h, resulting in a biomethane composition of CO < 2.4%, CH > 95.5%, O < 1% and no HS. Despite the poor robustness of this technology against failures in biogas and liquid supply (CH concentration of 67.5 and 70.9% after 2 h of biogas or liquid stoppage, respectively), the control system was capable of restoring biomethane quality in less than 2 h when biogas or liquid supply was resumed.
在半工业规模（9.6 m）光生物反应器中，通过光合产生的氧气来氧化 HS，利用微藻消耗光驱动的 CO 来验证沼气升级的控制策略，该策略已得到验证。该控制系统能够支持 CO 浓度低于 2%，O 含量≤1%，而与培养液的 pH 无关（范围为 9.05 至 9.50）。此外，该控制系统能够有效地应对沼气流量从 143 到 420 L/h 的变化，从而产生 CO<2.4%、CH>95.5%、O<1%和无 HS 的生物甲烷组成。尽管该技术对沼气和液体供应故障的鲁棒性较差（沼气或液体停止供应 2 小时后，CH 浓度分别为 67.5%和 70.9%），但当沼气或液体供应恢复时，控制系统能够在不到 2 小时内恢复生物甲烷质量。
