检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]中国海洋大学海洋环境与生态教育部重点实验室,山东青岛266100 [2]中国科学院海洋研究所,山东青岛266071
出 处:《中国环境科学》2015年第5期1526-1534,共9页China Environmental Science
基 金:国家科技支撑计划课题(2011BAD14B04)资助
摘 要:为降低光生物反应器(PBR)的光照能耗和提高微藻对光能的利用效率,自制了内置LED光源的平板型光生物反应器,用于绿藻普通小球藻(Chlorella vulgaris)的培养和CO2生物固定.评价了这种新型反应器的进气CO2浓度对生物质产率(BP)、CO2固定速率(2COF)和油脂产率(LP)的影响.经过10d连续培养后,与通入空气的对照组相比,浓度1%~10%的CO2均明显促进微藻生长,BP[0.258和0.263g/(L d)]、最大2COF[1.18、1.00g CO2/(L d)]和指数生长期平均2COF[0.57、0.62g CO2/(L d)]的高值均出现在CO2 1%、2.5%处理组中.较高浓度(5%、10%)CO2在培养初期造成酸化现象,导致藻细胞密度和生物量较低.CO2浓度变化对微藻总脂含量(17.81%~23.13%)影响较小,以CO2 2.5%条件下得到微藻油脂产率最大[60.71mg/(L d)].本研究证明,所设计的平板型PBR能够高效培养用于CO2固定和生物柴油原料生产的微藻.In order to improve the utilization efficiency of light by microalgae within a photobioreactor (PBR), an internally LED-illuminated fiat plate PBR with volume of 3L was constructed and used for Chlorophyta (Chlorella vulgaris) in this study. Effects of the concentration of inlet CO2 on the biomass production (BP), fixation efficiency of carbon (Fco2 ) and the production of lipid (LP) were evaluated. Biomass of microalgae in each treatment with concentration of CO2 ranging from 1% to 10% was higher than that of control with air (0.04% CO2) aeration in the cultures after 10-days growth. High levels of BP [0.258 and 0.263g/(L·d)], Fco2 [1.18 and 1.00gCO2/(L·d)] and average Fco2 [0.57 and 0.62gCO2/(L·d)] during the exponential growth stage were obtained under the concentration of CO2 at 1% and 2.5%, respectively. The cell density and biomass of microalgae were inhibited by the higher concentrations of CO2 (5% and 10%) during the initial growth stage because of acidification in cultures. Significant effects of CO2 concentrations on the production of lipid (17.81% - 23.13%) were not found here. The highest productivity of lipid [60.7 l mg/(L'd)] was obtained under the concentration of CO2 at 2.5%. The present results suggested that the PBR used here was useful to improve CO2 biofixation and the production of lipid of microalgae.
关 键 词:普通小球藻 光生物反应器 CO2 生物量 油脂产率
分 类 号:X17[环境科学与工程—环境科学]
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.124