压力对微藻生长及固碳效果的影响  

Influence of pressure on the growth and carbon sequestration of microalgae

作　　者：严鹿鸣 温馨 茶建宾 薛圣垣 张永奎[2] 谢通慧 YAN Luming;WEN Xin;CHA Jianbin;XUE Shengyuan;ZHANG Yongkui;XIE Tonghui(Technology Innovation Center for Comprehensive Utilization of Strategic Mineral Resources,Ministry of Natural Resources,Chengdu 610041;Department of Pharmaceutical and Biological Engineering,School of Chemical Engineering,Sichuan University,Chengdu 610065)

机构地区：[1]自然资源部战略性矿产综合利用工程技术创新中心,成都610041 [2]四川大学化学工程学院制药与生物工程系,成都610065

出　　处：《环境科学学报》2024年第10期227-234,共8页Acta Scientiae Circumstantiae

基　　金：自然资源部战略性矿产综合利用工程技术创新中心开放基金(No.CCUM-KY-2302)。

摘　　要：由于人类活动导致的温室气体排量升高加剧了全球变暖、海洋酸化等不利于生态多样性的进程,其中,二氧化碳占据总排量的70%以上.为减少其对生态环境的影响,必须研究二氧化碳的捕集与储存方法 .微藻凭借温和的培养条件、较高的光合作用效率和生物质产率成为生物固碳领域的研究热点.本研究旨在探究达到最大胞外分泌的最佳气压条件,以此为策略提高微藻的碳固定能力.采用密闭、微正压等形式增强培养体系中二氧化碳从气相到液相的传递.结果表明,在1.25 ATM条件下,培养体系中微藻细胞达到了38.4 mg·L^(-1)的最大胞外有机碳分泌浓度.升高气压有利于促进微藻对培养基中无机氮、磷的吸收,培养体系的氮去除率最高达到31.92%,磷去除率最高达到45.00%.本研究结果将为突破微藻固碳的瓶颈提供可能,并推进微藻固碳的工业应用的可行性验证.Human activities,particularly the emission of greenhouse gases such as carbon dioxide,exacerbated processes that are detrimental to ecological diversity,including global warming and ocean acidification.To mitigate their impacts,it is necessary to investigate carbon dioxide capture and storage methods.Microalgae is a popular research topic in the field of biological carbon sequestration due to their mild culture conditions,high photosynthetic efficiency,and biomass yield.The study aimed to determine the optimal air pressure conditions to achieve maximum extracellular secretion,which can improve the carbon fixation capacity of microalgae.A closed culture system and micro-positive pressure were adopted to enhance carbon dioxide transfer from the gas phase to the liquid phase.Microalgal cells achieved a maximum extracellular organic carbon secretion concentration of 38.4 mg·L^(-1) at 1.25 ATM.The study found that the elevated air pressure facilitated the uptake of inorganic nitrogen and phosphorus by microalgae from the environment.The maximum nitrogen removal rate was 31.92%,and the maximum phosphorus removal rate was 45.00%.These results suggest a possible breakthrough in the bottleneck of carbon sequestration by microalgae and validate the feasibility of industrial applications of microalgae carbon sequestration.

关 键 词：气压 微藻 密闭培养 生物固碳 

分 类 号：X172[环境科学与工程—环境科学]