Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education; International Research Center for Marine Biosciences, Ministry of Science and Technology; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, 201306, China; School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China; Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China.
Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education; International Research Center for Marine Biosciences, Ministry of Science and Technology; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, 201306, China; School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
J Hazard Mater. 2020 Dec 5;400:123258. doi: 10.1016/j.jhazmat.2020.123258. Epub 2020 Jun 25.
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 with 2.5 g L lipid and 38.5 mg L lutein using hydrolysate with an initial glucose concentration of 10 g L. Meanwhile, the resultant algal biomass was 6.9 g L with 1.8 g L lipid and 63.0 mg L lutein using hydrolysate with an initial glucose concentration of 20 g L, 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.
将食物垃圾转化为增值产品是解决全球食物垃圾管理问题的一种有前途的方法。在这项研究中，研究了通过微藻发酵生产生物能源和叶黄素的新型增值策略。从食物垃圾的酶解中回收了大量的葡萄糖。然后，将所得水解物用作混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。使用食物水解物从微藻生物质中获得的藻类油脂在生物柴油特性方面具有很高的质量。此外，在半连续发酵中，使用初始葡萄糖浓度为 10 g/L 的水解物时，平均藻类生物量为 6.1 g/L，脂质为 2.5 g/L，叶黄素为 38.5 mg/L。同时，使用初始葡萄糖浓度为 20 g/L 的水解物时，所得藻类生物量为 6.9 g/L，脂质为 1.8 g/L，叶黄素为 63.0 mg/L，这表明食物垃圾水解物可以引发藻类产品的偏好。本研究的实验结果表明，微藻作为将食物垃圾转化为高价值产品的生物转化平台具有潜力，特别是可持续的生物能源。
