Applying mixotrophy strategy to enhance biomass production and nutrient recovery of Chlorella pyrenoidosa from biogas slurry: An assessment of the mixotrophic synergistic effect
文献类型： 外文期刊
第一作者： Han, Ting
作者： Han, Ting;Ye, Xiaomei;Xi, Yonglan;Zhang, Yingpeng;Han, Ting;Ye, Xiaomei;Xi, Yonglan;Zhang, Yingpeng;Guan, Huibo;Guan, Huibo;Ye, Xiaomei
作者机构： Inst Anim Sci, Jiangsu Acad Agr Sci, Nanjing 210014, Peoples R China;Minist Agr & Rural Affairs, Key Lab Crop & Livestock Integrat, Nanjing 210014, Peoples R China;Nanjing Agr Univ, Coll Resources & Environm Sci, Nanjing 210014, Peoples R China;Jiangsu Univ, Sch Environm & Safety Engn, Zhenjiang 212013, Peoples R China;50 Zhonglingjie St, Nanjing 210014, Peoples R China
关键词： Chlorella pyrenoidosa; Mixotrophic synergistic effect; Biomass production; Nutrient recovery; Biogas slurry
期刊名称：BIORESOURCE TECHNOLOGY （ 2021影响因子：11.889； 五年影响因子：11.139 ）
ISSN： 0960-8524
年卷期： 2022 年 366 卷
收录情况： SCI
摘要： Using biogas slurry to cultivate microalgae can simultaneously obtain microalgal biomass and allow nutrient recovery. Mixotrophic microalgae are widely recognized for their high biomass accumulation and low light dependence, making it possible to overcome the drawbacks of photoautotrophy. In this study, three complete metabolic modes of photoautotrophy, heterotrophy, mixotrophy and two incomplete metabolic modes with the addition of diuron and rotenone were applied to investigate Chlorella pyrenoidosa growth in biogas slurry. The results showed that the mixotrophic group obtained 1.15 g/L biomass, 30 % starch content, 99.40 % ammonium removal and 81.69 % total phosphorus removal, which were highly promoted compared to the others. The decline in chlorophyll, the simultaneous downregulation of Rubisco and citrate synthase and the increase in the actual quantum yield of PSII under mixotrophy revealed a synergistic effect: the complementation of photo-phosphorylation and oxidative phosphorylation greatly contributed to maximizing energy metabolism efficiency and minimizing energy dissipation loss.
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