Department of Experimental Biology, Faculty of Science, Masaryk University in Brno, Kamenice 735/5, 625 00 Brno, Czech Republic; Institute of Sustainable Processes, Dr. Mergelina s/n, 47011 Valladolid, Spain; Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina s/n, 47011 Valladolid, Spain.
Institute of Sustainable Processes, Dr. Mergelina s/n, 47011 Valladolid, Spain; Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina s/n, 47011 Valladolid, Spain.
J Hazard Mater. 2023 Feb 5;443(Pt B):130337. doi: 10.1016/j.jhazmat.2022.130337. Epub 2022 Nov 5.
Biogas desulfurization based on anoxygenic photosynthetic processes represents an alternative to physicochemical technologies, decreasing the risk of O and N contamination. This work aimed at assessing the potential of Allochromatium vinosum and Chlorobium limicola for biogas desulfurization under different light intensities (10 and 25 klx) and HS concentrations (1 %, 1.5 % and 2 %) in batch photobioreactors. In addition, the influence of rising biogas flow rates (2.9, 5.8 and 11.5 L d in stage I, II and III, respectively) on the desulfurization performance in a 2.3 L photobioreactor utilizing C. limicola under continuous mode was assessed. The light intensity of 25 klx negatively influenced the growth of A. vinosum and C. limicola, resulting in decreased HS removal capacity. An increase in HS concentrations resulted in higher volumetric HS removal rates in C. limicola (2.9-5.3 mg L d) tests compared to A. vinosum (2.4-4.6 mg L d) tests. The continuous photobioreactor completely removed HS from biogas in stage I and II. The highest flow rate in stage III induced a deterioration in the desulfurization activity of C. limicola. Overall, the high HS tolerance of A. vinosum and C. limicola supports their use in HS desulfurization from biogas.
基于乏氧光合作用的沼气脱硫代表了一种替代物理化学技术的方法，可以降低 O 和 N 污染的风险。本工作旨在评估在不同光照强度（10 和 25 klx）和 HS 浓度（1%、1.5%和 2%）下，在分批光生物反应器中 Allochromatium vinosum 和 Chlorobium limicola 对沼气脱硫的潜力。此外，还评估了在连续模式下，利用 C. limicola 在 2.3 L 光生物反应器中，随着沼气流量的增加（分别在阶段 I、II 和 III 中为 2.9、5.8 和 11.5 L d）对脱硫性能的影响。25 klx 的光照强度对 A. vinosum 和 C. limicola 的生长产生了负面影响，导致 HS 去除能力下降。HS 浓度的增加导致 C. limicola 中（2.9-5.3 mg L d）的体积 HS 去除率高于 A. vinosum （2.4-4.6 mg L d）测试。连续光生物反应器在阶段 I 和 II 中完全从沼气中去除了 HS。在阶段 III 中，最高流速导致 C. limicola 的脱硫活性恶化。总的来说，A. vinosum 和 C. limicola 对 HS 的高耐受性支持它们用于沼气中 HS 的脱硫。
