Mutate Chlorella sp by nuclear irradiation to fix high concentrations of CO2

被引:136
|
作者
Cheng, Jun [1 ]
Huang, Yun [1 ]
Feng, Jia [1 ]
Sun, Jing [1 ]
Zhou, Junhu [1 ]
Cen, Kefa [1 ]
机构
[1] Zhejiang Univ, State Key Lab Clean Energy Utilizat, Hangzhou 310027, Peoples R China
基金
中国国家自然科学基金;
关键词
Microalgae; CO2; fixation; Nuclear irradiation; Domestication; Biomass; CARBON-DIOXIDE FIXATION; POWER-PLANT; FLUE-GAS; NANNOCHLOROPSIS-OCULATA; CHLOROCOCCUM-LITTORALE; WASTE-WATER; MICROALGAE; CULTIVATION; RADIATION; BIOMASS;
D O I
10.1016/j.biortech.2013.03.072
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
To improve biomass productivity and CO2 fixation of microalgae under 15% (v/v) CO2 of flue gas, Chlorella species were mutated by nuclear irradiation and domesticated with high concentrations of CO2. The biomass yield of Chlorella pyrenoidosa mutated using 500 Gy of Co-60 gamma irradiation increased by 53.1% (to 1.12 g L-1) under air bubbling. The mutants were domesticated with gradually increased high concentrations of CO2 [from 0.038% (v/v) to 15% (v/v)], which increased the biomass yield to 2.41 g L-1. When light transmission and culture mixing in photo-bioreactors were enhanced at 15% (v/v) CO2, the peak growth rate of the domesticated mutant (named Chlorella PY-ZU1) was increased to 0.68 g L-1 d(-1). When the ratio of gas flow rate (L min(-1)) to 1 L of microalgae culture was 0.011, the peak CO2 fixation rate and the efficiency of Chlorella PY-ZU1 were 1.54 g L-1 d(-1) and 32.7%, respectively. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码:496 / 501
页数:6
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