Northern Ontario School of Medicine, 935 Ramsey Lake Rd, Sudbury, ON P3E 2C6, Canada.
AMB Express. 2014 Mar 26;4(1):7. doi: 10.1186/2191-0855-4-7.
With fossil fuel sources in limited supply, microalgae show tremendous promise as a carbon neutral source of biofuel. Current microalgae biofuel strategies typically rely on growing high-lipid producing laboratory strains of microalgae in open raceways or closed system photobioreactors. Unfortunately, these microalgae species are found to be sensitive to environmental stresses or competition by regional strains. Contamination by invasive species can diminish productivity of commercial algal processes. A potential improvement to current strategies is to identify high-lipid producing microalgae, which thrive in selected culture conditions that reduce the risk of contamination, such as low pH. Here we report the identification of a novel high-lipid producing microalgae which can tolerate low pH growth conditions. Lig 290 is a Scenedesmus spp. isolated from a low pH waterbody (pH = 4.5) in proximity to an abandoned lignite mine in Northern Ontario, Canada. Compared to a laboratory strain of Scendesmus dimorphus, Lig 290 demonstrated robust growth rates, a strong growth profile, and high lipid production. As a consequence, Lig 290 may have potential application as a robust microalgal species for use in biofuel production.
由于化石燃料资源有限，微藻作为一种碳中和的生物燃料来源具有巨大的潜力。目前的微藻生物燃料策略通常依赖于在开放跑道或封闭系统光生物反应器中生长高脂质生产的实验室品系微藻。不幸的是，这些微藻物种被发现对环境压力或区域品系的竞争敏感。入侵物种的污染会降低商业藻类过程的生产力。对当前策略的一个潜在改进是鉴定在选定的培养条件下茁壮成长的高脂质生产微藻，这些条件降低了污染的风险，例如低 pH 值。在这里，我们报告了一种新型高脂质生产微藻的鉴定，该微藻能够耐受低 pH 值的生长条件。 Lig 290 是从加拿大安大略省北部一个废弃褐煤矿附近 pH 值为 4.5 的低 pH 值水体中分离出来的一种 Scenedesmus spp。与 Scendesmus dimorphus 的实验室菌株相比， Lig 290 表现出强劲的生长速率、强劲的生长曲线和高脂质产量。因此，Lig 290 可能具有作为用于生物燃料生产的稳健微藻物种的潜在应用。
