以市政污水为底物的微藻油脂积累和碳流分析  

Microalgae lipid accumulation and carbon flux analysis based on municipal wastewater used as medium

作　　者：李超[1] 冯玉杰[1] 张大伟 初晓婉[1] 

机构地区：[1]哈尔滨工业大学城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090 [2]哈尔滨工业大学威海校区环境科学与工程系,山东威海264200

出　　处：《可再生能源》2012年第6期93-96,共4页Renewable Energy Resources

基　　金：国家科技支撑计划(2011BAD14B03)

摘　　要：微藻培养的高成本阻碍了微藻生物柴油的工业化推广。文章以市政污水作为Chlorella vulgraris的培养基，分别在水力停留时间（HRT）24，48，96h和间歇运行时对其进行培养。随着HRT的增加，C．vulgraris在系统生物群落中所占的比例增大，而且细胞密度和脂含量也分别由HRT24h时的0．088g／L和8．4％提高到间歇时的0．164g／L和14．3％。HRT对废水处理效果的影响较小，不同HRT时，COD和TP的去除率分别在66．1％．71．1％和37．6％～51．1％，TN的去除率则仅为5．9％-11．2％。对间歇污水处理过程碳元素流动分析表明．污水中的71．1％有机碳被微藻利用，其中94．6％被转化为微藻生物质，其余被代谢为CO2释放，废水中有机碳（COD）转化为微藻油脂的转化率为11．6mg／（mg·L）。The commercial production of microalgae biodiesel was hindered by the higher cost of algae cultivation. In this study, municipal wastewater was used to cultivate Chlorella vulgaris under hydraulic retention time （HRT） 24 h, 48 h, 96 h and batch cultivation. The ratio of C.vulgaris in total biomass was enhanced along with the increase of HRT. Furthermore, cell density and lipid content also increased from 0.088 g/L and 8.4% under HRT 24 h to 0.164 g/L and 14.3% under batch cultivation, respectively. The treatment of wastewater was not influenced by HRT significantly. The removal efficiency of COD and TP was 66.1%-71.1% and 37.6%-51.1%, respectively. However, TN removal efficiency was only 5.9%-11.2%. The carbon flux analysis of batch cultivation showed that 71.1% of organic carbon in wastewater was used by microalgae. Furthermore, 94.6% of used organic carbon was converted into algae biomass, and others into CO2. The transfer ratio of wastewater organic carbon（COD） to microalgae lipid was 11.6 mg/（mg.L）.

关 键 词：市政污水 微藻油脂 CHLORELLA VULGARIS 

分 类 号：TK6[动力工程及工程热物理—生物能] TK91