Experimental study on CO2 fixation from simulated flue gas by Chlorella vulgaris

doi:10.16085/j.issn.1000-6613.2015.04.043

Abstract

Abstract: Theglobe warming caused by elevated CO₂ level in atmosphere is of big concerns. Biological CO₂ mitigation by microalgae is a hot issue. In this paper,Chlorella vulgaris(FACHB-1227) were cultured with SE medium in concentric-tube photobioreactor with aeration pores in inner tube. Cultures in the photobioreactor were aerated intermittently with simulated flue gas which contains different CO₂ concentrations,i.e. 5%,10%,15% and 20%. In this work,cell density and CO₂ fixation rate were used to describe the growth and carbon fixation capacity of Chlorella vulgaris. After 17 days of cultivation,Chlorella vulgaris presented better results for all parameters under simulated flue gas with 10% CO₂,the maximum cell concentration of Chlorella vulgaris was 8.76×10⁶cells/mL,increasing 54.23%,66.86% and 76.97% compared to 5%CO₂,15%CO₂ and 20% CO₂ groups,respectively; the maximum CO₂ fixation rate were 30.18mg/(L·d),increasing 57.27%,70.89% and 81.91% compared to 5% CO₂,15%CO₂ and 20%CO₂ groups,respectively. The results show that Chlorella vulgaris shows a better capacity of CO₂ fixation in simulated flue gas with 10% CO₂.

Key words: Chlorella vulgaris, CO₂, cell density, average rate of CO₂ fixation

摘要： 大气中CO₂浓度增加造成的全球变暖已成为一个严峻的环境问题,利用微藻生物固碳法减排CO₂正成为研究热点.本文以普通小球藻(Chlorella vulgaris,FACHB-1227)为研究对象,采用SE无碳培养基,在沿程曝气型套管式光生物反应器中通入含不同体积分数CO₂(5%、10%、15%和20%)的模拟烟气培养小球藻,培养周期为17天,以细胞密度和平均固碳速率为检测指标,研究模拟烟气下普通小球藻生长情况及固碳能力.实验结果表明:当模拟烟气中CO₂体积分数为10%时,普通小球藻的细胞密度达到最大值8.76×10⁶cells/mL,相比于5%组、15%组和20%组分别提高了54.23%、66.86%和76.97%;其平均固碳速率达最大值30.18mg/(L·d),较5%组、15%组和20%组分别提高了57.27%、70.89%和81.91%.可见,在模拟烟气中CO₂体积分数为10%时,普通小球藻的生长情况和固碳性能最好.

关键词: 普通小球藻, CO₂, 细胞密度, 平均固碳速率

CLC Number:

LUO Mengyuan, YANG Junhong, GONG Qitao, ZUO Pengpeng, KANG Ligai. Experimental study on CO₂ fixation from simulated flue gas by Chlorella vulgaris[J]. Chemical Industry and Engineering Progree, 2015, 34(04): 1147-1151.

罗梦圆, 杨俊红, 巩启涛, 左鹏鹏, 康利改. 普通小球藻固定模拟烟气中CO₂的实验研究[J]. 化工进展, 2015, 34(04): 1147-1151.

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Experimental study on CO₂ fixation from simulated flue gas by Chlorella vulgaris

普通小球藻固定模拟烟气中CO₂的实验研究

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