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Aspergillus sp. assisted bioflocculation of Chlorella MJ 11/11 for the production of biofuel from the algal-fungal co-pellet
Separation and Purification Technology ( IF 8.6 ) Pub Date : 2021-01-17 , DOI: 10.1016/j.seppur.2021.118320
Amrit Lal , Sanjukta Banerjee , Debabrata Das

In recent times to address the energy issues, the use of microalgal feedstock as third generation biofuel has gained significance due to sustainability and feasibility. Compared to terrestrial plants, it has a higher growth rate and superior CO2 and sunlight fixation capacity; along with higher lipid content. However, a major bottleneck which impedes the mass production of microalgal oil is the high cost of harvesting. Therefore, energy efficient and eco-friendly harvesting techniques are crucial to improve the economic viability of algal biofuel production. In this study, pellet forming Aspergillus sp was evaluated for the efficient biomass recovery of Chlorella sp. MJ11/11 through the process of fungal pelletization. The effect of different process factors like: rotational speed of the shaker, pH, nutrients and cationic agent concentrations in the media on biomass recovery were evaluated. When algae: fungi were used in 1:3 w/w ratios, more than 90% harvesting efficiency was obtained at pH 3 within 5 h. Fourier transform infrared spectroscopy analysis showed changes in the C-H and C-N groups indicating their role in co-pelletization process. The CHNS characterization of the co-pellet showed an improved C/N ratio, with a high heating value of 19.55MJ Kg-1. The lipid and biomass concentration of the co-pellet was 332 mg L-1 and 2.37 ± 0.12 g L-1 respectively. Also, the X-ray diffraction analysis indicated an increase in the amorphous property of the co-pellet; demonstrating the suitability of the algal fungal co-pellet as a substrate for biofuel production.



中文翻译:

曲霉菌。辅助绿藻MJ 11/11的生物絮凝,以从藻-真菌共生球团生产生物燃料

近年来,为了解决能源问题,由于可持续性和可行性,使用微藻原料作为第三代生物燃料已变得越来越重要。与陆生植物相比,它具有更高的生长速度和出色的CO 2和日光固定能力;以及更高的脂质含量。然而,阻碍微藻油大规模生产的主要瓶颈是收割的高成本。因此,高效节能和环保的收获技术对于提高藻类生物燃料生产的经济可行性至关重要。在这项研究中,评估了形成小曲霉菌小球藻有效生物量的回收率。sp。MJ11 / 11通过真菌制粒过程。评估了不同过程因素的影响,例如:振荡器的转速,pH,培养基中的养分和阳离子试剂浓度对生物量回收的影响。当以1:3 w / w的比例使用藻类:真菌时,在5小时内在pH 3时可获得90%以上的收获效率。傅里叶变换红外光谱分析表明,CH和CN基团的变化表明它们在共制粒过程中的作用。共丸的CHNS表征显示出改善的C / N比,具有19.55MJ Kg -1的高发热量。共丸的脂质和生物质浓度为332 mg L -1和2.37±0.12 g L -1分别。另外,X射线衍射分析表明共丸的无定形性能增加。证明了藻类真菌共丸作为生物燃料生产基质的适用性。

更新日期:2021-01-18
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