Department of Chemical Engineering and Environmental Technology, Valladolid University, Dr. Mergelina, s/n, 47011 Valladolid, Spain.
Department of Chemical Engineering and Environmental Technology, Valladolid University, Dr. Mergelina, s/n, 47011 Valladolid, Spain; Universidad Pedagógica Nacional Francisco Morazán, Boulevard Centroamérica, Tegucigalpa, Honduras.
Bioresour Technol. 2017 May;232:133-141. doi: 10.1016/j.biortech.2017.01.071. Epub 2017 Feb 11.
The bioconversion of biogas to biomethane coupled to centrate treatment was evaluated in an outdoors pilot scale high rate algal pond interconnected to an external CO-HS absorption column (AC) via settled broth recirculation. CO-removal efficiencies ranged from 50 to 95% depending on the alkalinity of the cultivation broth and environmental conditions, while a complete HS removal was achieved regardless of the operational conditions. A maximum CH concentration of 94% with a limited O and N stripping was recorded in the upgraded biogas at recycling liquid/biogas ratios in the AC of 1 and 2. Process operation at a constant biomass productivity of 15gmd and the minimization of effluent generation supported high carbon and nutrient recoveries in the harvested biomass (C=66±8%, N=54±18%, P≈100% and S=16±3%). Finally, a low diversity in the structure of the microalgae population was promoted by the environmental and operational conditions imposed.
采用沉淀培养液循环回流的方式，将外部 CO-HS 吸收塔与户外中试规模高速藻类塘相连接，评估了沼气到生物甲烷的生物转化与浓缩液处理的偶联。CO 去除效率取决于培养液的碱度和环境条件，范围为 50%至 95%，而无论操作条件如何，均能实现完全的 HS 去除。在 AC 中的循环液体/沼气比为 1 和 2 时，在升级的沼气中记录到了最高 94%的 CH 浓度，且 O 和 N 的去除有限。在恒定生物质生产力为 15gmd 和最小化废水生成的条件下进行操作，有助于实现收获生物质中的高碳和养分回收（C=66±8%，N=54±18%，P≈100%和 S=16±3%）。最后，通过施加的环境和操作条件，促进了藻类种群结构的低多样性。
