College of Resources and Environment, Northwest A & F University, Yangling 712100, PR China.
SouthEast Water, 101 Wells Street, Frankston, VIC 3199, Australia.
Bioresour Technol. 2020 Apr;302:122903. doi: 10.1016/j.biortech.2020.122903. Epub 2020 Jan 27.
Screening for highly efficient microalgae is an important technique for improving treatment efficiency. In this study, eight species of microalgae (five Scenedesmus and three Desmodesmus) were isolated from water and soil in the Hexi Corridor region, China, and identified by 18S rRNA gene sequence analysis. Scenedesmus sp. HXY2 grew well under high total organic carbon and ammonia conditions and had the highest nutrient removal efficiency (>95%). On day 12, the biomass of Scenedesmus sp. HXY2 was 7.2 × 10 cells mL. The lipid content and productivity of this species were 15.56% and 5.67 mg L day, respectively. The proportion of unsaturated fatty acids (60.07%) indicated that the lipids of Scenedesmus sp. HXY2 were suitable for biodiesel production. Scenedesmus sp. HXY2 showed great potential for growth in wastewater with high ammonia and organic contents to simultaneously purify wastewater and produce lipids.
筛选高效微藻是提高处理效率的重要技术。本研究从中国河西走廊地区的水和土壤中分离出 8 种微藻（5 种栅藻和 3 种须藻），并通过 18S rRNA 基因序列分析进行鉴定。HXY2 藻在高总有机碳和氨条件下生长良好，具有最高的养分去除效率（>95%）。第 12 天，HXY2 藻的生物量为 7.2×10 cells mL。该物种的脂质含量和生产力分别为 15.56%和 5.67 mg L day。不饱和脂肪酸的比例（60.07%）表明 HXY2 藻的脂质适合生产生物柴油。HXY2 藻在高氨和有机物含量的废水中具有良好的生长潜力，可同时净化废水并生产脂质。
