Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan; Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan.
Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan.
Bioresour Technol. 2019 Oct;290:121804. doi: 10.1016/j.biortech.2019.121804. Epub 2019 Jul 13.
Biogas is the gaseous byproduct obtained during anaerobic digestion which is rich in methane, along with a significant amount of other gases like CO. The removal of CO is essential to upgrade the biogas to biomethane (>95% methane content). High CO tolerant microalgae can be employed as a biological CO scrubbing agent for biogas upgrading. Many microalgal strains tolerant to the levels of CO and CH seen in biogas have been reported. A CO removal efficiency of 50-99% can be attained based on the microalgae used and the cultivation conditions applied. Nutrient-rich liquid digestate obtained from anaerobic digestion can also be used as the cultivation medium for microalgae, performing biogas upgrading and digestate bioremediation simultaneously. Mixotrophic cultivation enables microalgae to utilize the organic carbon present in the liquid digestate along with nitrogen and phosphorus. Microalgae appears to be a potential biological CO scrubbing agent for efficient biogas upgrading.
沼气是在厌氧消化过程中产生的气态副产物，富含甲烷，同时还含有大量其他气体，如 CO。去除 CO 对于将沼气升级为生物甲烷（>95%甲烷含量）至关重要。高耐受 CO 的微藻可以用作沼气升级的生物 CO 洗涤器。已经报道了许多对沼气中存在的 CO 和 CH 水平具有耐受性的微藻菌株。根据所使用的微藻和应用的培养条件，可以达到 50-99%的 CO 去除效率。从厌氧消化中获得的富营养液体消化液也可用作微藻的培养介质，同时进行沼气升级和消化液生物修复。混合营养培养使微藻能够利用液体消化液中的有机碳以及氮和磷。微藻似乎是一种有效的生物 CO 洗涤器，可用于高效的沼气升级。
