A rich carbohydrate-lipid kitchen waste upcycling via Chlorella vulgaris cell proliferation and biomass production strategy

Q1 Environmental Science

Bioresource Technology Reports Pub Date : 2025-06-12 DOI:10.1016/j.biteb.2025.102173

Ting Zhang , Hao Zhou , Mingming Zhao, Dingqiang Zhang, Lin He

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Abstract

Photobioreactors facilitate microalgae growth but face low-efficiency challenges. This study investigated a new way to grow C. vulgaris by analysing a photobioreactor model for cell production. At a flow rate of 400 ml/min, the photobioreactor, incorporating biofilm packings, was found to enhance C. vulgaris cell proliferations by 1.4–1.7 times. C. vulgaris cell density (CD) increased by 1.1 to 5.5 times with the addition of 5–50 g/l sucrose in comparison to glucose. When adding sugars to the microalgae liquid, the C. vulgaris bioproducts increased by a trend: sucrose > lactose > maltose > trehalose > glucose. The 8.7-fold enhancements of CD, mass concentration of C. vulgaris biomass, and chlorophyll content were achieved by the kitchen waste utilisation, which augmented the high-valued chemical synthesis, including C–O, C–H function-group products aggregation, oil-cellulose harvesting, and water acidification mitigation. This study supports a green recycling pathway converting municipal solid waste into high-value bioproducts.

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通过小球藻细胞增殖和生物质生产策略对富含碳水化合物-脂质的厨余垃圾进行升级利用

光生物反应器促进微藻生长，但面临效率低下的挑战。本研究通过光生物反应器模型的分析，探索了一种新的生长方法。在流速为400 ml/min的情况下，采用生物膜填料的光生物反应器可使C. vulgaris细胞增殖能力提高1.4 ~ 1.7倍。与葡萄糖相比，添加5 ~ 50 g/l蔗糖可使C. vulgaris细胞密度增加1.1 ~ 5.5倍。在微藻液中添加糖后，C. vulgaris生物制品呈增加趋势：蔗糖；乳糖在麦芽糖祝辞海藻糖在葡萄糖。餐厨垃圾的利用提高了黄颡鱼生物量的CD、质量浓度和叶绿素含量，提高了8.7倍，增加了高价值的化学合成，包括C-O、C-H官能团产物的聚集、油纤维素的收获和水酸化的缓解。本研究支持将城市固体废物转化为高价值生物产品的绿色回收途径。

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