Sustainable lipid and lutein production from Chlorella mixotrophic fermentation by food waste hydrolysate
Sustainable lipid and lutein production from Chlorella mixotrophic fermentation by food waste hydrolysate
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利用食物垃圾水解产物进行小球藻混合营养发酵可持续生产脂质和叶黄素
DOI：
10.1016/j.jhazmat.2020.123258
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发表时间：
2020
影响因子：
13.6
通讯作者：
Lin Carol Sze Ki
中科院分区：
文献类型：
--
作者：
Wang Xiang;Zhang Man-Man;Sun Zheng;Liu Si-Fen;Qin Zi-Hao;Mou Jin-Hua;Zhou Zhi-Gang;Lin Carol Sze Ki
将餐厨垃圾生物转化为增值产品是解决全球餐厨垃圾管理问题的一种有前途的方法。在这项研究中，一种新的价值战略，生物能源和叶黄素生产通过微藻发酵进行了研究。从食物垃圾的酶水解中回收了大量的葡萄糖。然后将所得水解产物用作混合营养培养小球藻的培养基，以获得高水平的脂质和叶黄素，其积累模式与分子分析一致。从微藻生物质中使用食品水解物得到的藻脂在生物柴油性质方面是高品质的。此外，在半连续发酵中，使用初始葡萄糖浓度为10 g L-1的水解产物，平均藻类生物量为6.1 g L-1，脂质为2.5 g L-1，叶黄素为38.5 mg L-1。同时，使用初始葡萄糖浓度为20 g L− 1的水解产物，所得藻类生物质为6.9 g L− 1，其中脂质为1.8 g L− 1，叶黄素为63.0 mg L− 1，这表明食物垃圾水解产物可以引发藻类产品偏好。这项研究的实验结果表明，微藻作为一个平台，将食物垃圾生物转化为高价值的产品，特别是可持续的生物能源的潜力。
Bioconversion of food waste into value-added products is a promising way to tackle the global food waste management problem. In this study, a novel valorisation strategy for bioenergy and lutein production via microalgal fermentation was investigated. Significant amount of glucose was recovered from enzymatic hydrolysis of food waste. The resultant hydrolysate was then utilised as culture medium in mixotrophic cultivation of Chlorella sp. to obtain high levels of lipid and lutein, whose accumulation patterns were consistent with molecular analyses. The resultant algal lipid derived from microalgal biomass using food hydrolysate was at high quality in terms of biodiesel properties. Further, in semi-continuous fermentation, the average algal biomass was 6.1 g L−1with 2.5 g L−1lipid and 38.5 mg L−1lutein using hydrolysate with an initial glucose concentration of 10 g L−1. Meanwhile, the resultant algal biomass was 6.9 g L−1with 1.8 g L−1lipid and 63.0 mg L−1lutein using hydrolysate with an initial glucose concentration of 20 g L−1, which suggests food waste hydrolysate could trigger algal products preferences. The experimental results of this study suggested the potential of microalgae as a platform for bioconversion of food waste into high-value products, especially sustainable bioenergy.