Biomass Conversion and Biorefinery ( IF 3.5 ) Pub Date : 2022-01-14 , DOI: 10.1007/s13399-022-02313-7 Barasa Malakar 1 , Debasish Das 1, 2 , Kaustubha Mohanty 1, 3
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The excessive price of nutrients needed for microalgal cultivation is a vital constraint, although mass production is essential for attaining economically viable production of algal fuels and value-added products. Increasing energy demand has prompted the world to look for alternative oil resources. There is a crucial demand for sustainable and economically viable source of energy due to the reduction in conventional fossil fuel supplies. In this study, potato peel and sweet lime peels were exploited in place of conventional growth mediums for the cultivation of microalgal cells. These wastes are zero-value material, which contains vital nutrients and elements for the cultivation of oleaginous microorganisms like microalgae. The growth of the isolated strains Chlorella sorokiniana KMBM_K and KMBM_I in the pretreated peel hydrolysates was investigated. The biomass and lipid extracted can be further investigated for potential applications in biofuel, feed, and food additives. A new insight can be obtained with this study as it integrates the concept of lipid extracted microalgal biomass utilization (LEMB) approach along with waste disposal, thereby serving in the management of these agricultural wastes. While performing the optimization studies, pH 7 and 25% and 40% dilution, respectively, for potato peel and sweet lime were found to support more biomass and lipid yield. The highest biomass yield of 2.1 g L−1 and highest lipid productivity of 49.93 mg L−1 day−1 are obtained in Chlorella sorokiniana KMBM_K when cultivated in potato peel extract. This study showed that these agricultural wastes can be used as a natural, cost effective, ecofriendly, efficient, and affordable substrate for the cultivation of the microalgal isolates.
Graphical abstract
中文翻译：
利用废皮提取物培养微藻分离物：脂质生产力和生长动力学的研究
微藻培养所需的营养物价格过高是一个重要的制约因素，尽管大规模生产对于实现经济上可行的藻类燃料和增值产品生产至关重要。不断增长的能源需求促使世界寻找替代石油资源。由于传统化石燃料供应的减少，对可持续和经济上可行的能源的需求至关重要。在这项研究中，利用马铃薯皮和甜酸橙皮代替传统的生长培养基来培养微藻细胞。这些废物是零价值材料，其中含有用于培养微藻等产油微生物的重要营养物质和元素。分离菌株Chlorella sorokiniana的生长研究了预处理的果皮水解物中的 KMBM_K 和 KMBM_I。可以进一步研究提取的生物质和脂质在生物燃料、饲料和食品添加剂中的潜在应用。通过这项研究可以获得新的见解，因为它将脂质提取的微藻生物质利用 (LEMB) 方法的概念与废物处理相结合，从而用于管理这些农业废物。在进行优化研究时，发现马铃薯皮和甜石灰的 pH 值分别为 7 和 25% 和 40% 可支持更多的生物量和脂质产量。在Chlorella sorokiniana 中获得了 2.1 g L -1的最高生物量产量和 49.93 mg L -1 天-1的最高脂质生产力在马铃薯皮提取物中培养时的 KMBM_K。本研究表明，这些农业废弃物可用作天然、成本效益高、生态友好、高效且经济实惠的基质，用于微藻分离株的培养。
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