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Isolation and screening of Tetradesmus dimorphus and Desmodesmus asymmetricus from natural habitats in Northwestern China for clean fuel production and N, P removal
Biomass Conversion and Biorefinery ( IF 4 ) Pub Date : 2020-10-18 , DOI: 10.1007/s13399-020-01034-z
Le Wang , Lei Wang , Habasi Patrick Manzi , Qi Yang , Zhaodi Guo , Yuanzhang Zheng , Xingrong Liu , El-Sayed Salama

Isolation and screening of microalgal species from natural habitats should be a continues work to discover effective species for biofuel generation and wastewater treatment. In the current study, microalgal species namely Tetradesmus dimorphus GEEL-04 and Desmodesmus asymmetricus GEEL-05 were isolated, identified, and assessed for growth kinetics, nutrients removal efficiency, and whole biomass composition. T. dimorphus showed higher growth (1.46 OD680nm) compared with D. asymmetricus (1.16 OD680nm), and both showed 99% total nitrogen and total phosphorous removal. T. dimorphus and D. asymmetricus accumulated higher protein content (40.02 and 45.10%), carbohydrate (31.91 and 24.64%), and lipid (15.41 and 24.16%), respectively. The FTIR spectra absorbance revealed different function groups in microalgal biomass available for biofuel generation. Elemental analysis of microalgal biomass showed high carbon content 50.13% and 43.01% for T. dimorphus and D. asymmetricus, respectively. Thermogravimetric analysis indicated ≥ 80% volatile content in both isolates. The fatty acid composition of both microalgal strains showed high palmitic acid and linoleic acid corresponding to high quality biodiesel. These results indicated that the T. dimorphus and D. asymmetricus could be potential candidates for high biocomponents accumulation and N, P removal.



中文翻译:

从西北地区自然生境中分离和筛选出畸形马鞭草和不对称Desmodesmus,以生产清洁燃料和去除氮,磷

从自然栖息地中分离和筛选微藻类物种应该是一项持续的工作,以发现用于生物燃料生产和废水处理的有效物种。在当前的研究中,分离,鉴定并评估了微藻物种,即Tetradesmus dimorphus GEEL-04和Desmodesmus nonsymmetricus GEEL-05,并对其生长动力学,营养去除效率和整个生物质组成进行了评估。Ť。与D相比,dimorphus显示出更高的生长(1.46 OD 680nm)。不对称(1.16 OD 680nm),并且都显示99%的总氮和总磷去除率。Ť双形不对称D.分别积累了较高的蛋白质含量(40.02和45.10%),碳水化合物(31.91和24.64%)和脂质(15.41和24.16%)。FTIR光谱吸收显示了可用于生物燃料生产的微藻生物质中的不同功能组。微量藻类生物量的元素分析显示,T的碳含量高,为50.13%和43.01%。二形d不对称。热重分析表明,两种分离物中的挥发物含量均≥80%。两种微藻菌株的脂肪酸组成均显示出高棕榈酸和亚油酸,相当于高质量的生物柴油。这些结果表明,牛逼双形d不对称可能是高生物成分积累和氮,磷去除的潜在候选者。

更新日期:2020-10-19
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