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, University of Valladolid, Dr. Mergelina, s/n, 47011 Valladolid, Spain; Universidad Pedagógica Nacional Francisco Morazán, Boulevard Centroamérica, Tegucigalpa, Honduras.
GEMMA - Group of Environmental Engineering and Microbiology, Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya - BarcelonaTech, c/ Jordi Girona 1-3, Barcelona E-08034, Spain.
Bioresour Technol. 2019 May;280:112-117. doi: 10.1016/j.biortech.2019.02.029. Epub 2019 Feb 6.
The influence of the liquid-to-biogas ratio (L/G) and alkalinity on methane quality was evaluated in a 11.7 m outdoors horizontal semi-closed tubular photobioreactor interconnected to a 45-L absorption column (AC). CO concentrations in the upgraded methane ranged from <0.1 to 9.6% at L/G of 2.0 and 0.5, respectively, with maximum CH concentrations of 89.7% at a L/G of 1.0. Moreover, an enhanced CO removal (mediating a decrease in CO concentration from 9.6 to 1.2%) and therefore higher CH contents (increasing from 88.0 to 93.2%) were observed when increasing the alkalinity of the AC cultivation broth from 42 ± 1 mg L to 996 ± 42 mg L. HS was completely removed regardless of the L/G or the alkalinity in AC. The continuous operation of the photobioreactor with optimized operating parameters resulted in contents of CO (<0.1%-1.4%), HS (<0.7 mg m) and CH (94.1%-98.8%) complying with international regulations for methane injection into natural gas grids.
在一个与 45-L 吸收塔（AC）相连的 11.7 m 户外水平半封闭管状光生物反应器中，评估了液气比（L/G）和碱度对甲烷质量的影响。在 L/G 分别为 2.0 和 0.5 时，升级后的甲烷中的 CO 浓度分别为<0.1-9.6%，在 L/G 为 1.0 时，CH 浓度最高为 89.7%。此外，当将 AC 培养液的碱度从 42±1mg/L 增加到 996±42mg/L 时，观察到 CO 去除率提高（将 CO 浓度从 9.6%降低到 1.2%），因此 CH 含量更高（从 88.0%增加到 93.2%）。无论 AC 中的 L/G 或碱度如何，HS 都被完全去除。通过优化操作参数连续运行光生物反应器，得到的 CO（<0.1%-1.4%）、HS（<0.7 mg/m）和 CH（94.1%-98.8%）含量符合将甲烷注入天然气管道的国际规定。
