Sharp Christine E, Urschel Sydney, Dong Xiaoli, Brady Allyson L, Slater Greg F, Strous Marc
Department of Geosciences, University of Calgary, 2500 University Drive NW, EEEL 509, Calgary, AB T2N 1N4 Canada.
School of Geography and Earth Science, McMaster University, Hamilton, ON Canada.
Biotechnol Biofuels. 2017 Mar 29;10:84. doi: 10.1186/s13068-017-0769-1. eCollection 2017.
Bioenergy with carbon capture and storage (BECCS) has come to be seen as one of the most viable technologies to provide the negative carbon dioxide emissions needed to constrain global temperatures. In practice, algal biotechnology is the only form of BECCS that could be realized at scale without compromising food production. Current axenic algae cultivation systems lack robustness, are expensive and generally have marginal energy returns.
Here it is shown that microbial communities sampled from alkaline soda lakes, grown as biofilms at high pH (up to 10) and high alkalinity (up to 0.5 kmol m NaHCO and NaCO) display excellent (>1.0 kg m day) and robust (>80 days) biomass productivity, at low projected overall costs. The most productive biofilms contained >100 different species and were dominated by a cyanobacterium closely related to (>60%).
Frequent harvesting and red light were the key factors that governed the assembly of a stable and productive microbial community.
具有碳捕获与封存功能的生物能源（BECCS）已被视为提供限制全球气温所需的负二氧化碳排放的最可行技术之一。实际上，藻类生物技术是唯一一种能够大规模实现且不影响粮食生产的BECCS形式。当前的无菌藻类培养系统缺乏稳健性、成本高昂且能量回报通常较低。
研究表明，从碱性苏打湖中采样的微生物群落，在高pH值（高达10）和高碱度（高达0.5 kmol m NaHCO和NaCO）条件下以生物膜形式生长，在预计总成本较低的情况下，展现出优异的（>1.0 kg m day）且稳健的（>80天）生物质生产力。生产力最高的生物膜包含超过100种不同物种，且以一种与密切相关的蓝细菌为主导（>60%）。
频繁收获和红光照射是控制稳定且高产的微生物群落组装的关键因素。
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