Photosynthetic CO2 uptake by microalgae: An attractive tool for biogas upgrading

被引：103

作者：

Meier, L. ^{[1
,2
]}

Perez, R. ^{[1
,2
]}

Azocar, L. ^{[2
]}

Rivas, M. ^{[3
,4
]}

Jeison, D. ^{[1
,2
]}

机构：

[1] Univ La Frontera, Dept Chem Engn, Temuco, Chile

[2] Univ La Frontera, Sci & Technol Bioresource Nucleus, Temuco, Chile

[3] Ctr Invest Cient Tecnol Mineria CICITEM, Antofagasta, Chile

[4] Univ Antofagasta, Ctr Bioinnovac, Lab Ecol Microbiana, Antofagasta, Chile

来源：

BIOMASS & BIOENERGY | 2015年 / 73卷

关键词：

Biogas upgrading; CO2; uptake; Methane; Microalgae; Nannochloropsis gaditana; Photobioreactor; CARBON-DIOXIDE; LIPID PRODUCTION; MITIGATION; GROWTH;

D O I：

10.1016/j.biombioe.2014.10.032

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The use of photosynthetic CO2 reduction capacity of microalgae can be used for biogas upgrading. Such process would convert CO2 contained in the biogas into microalgal biomass, generating two products: upgraded biogas and biomass. Growth rate of Nannochloropsis gaditana was determined in atmospheres containing different levels of CH4 and CO2. Results showed no effect of CH4 rich atmosphere over microalgal development. CO2 inhibition was observed only when microalgae culture was exposed to atmospheres containing 9% of CO2. Direct contact of the biogas and the microalgal culture is not a feasible way to upgrade biogas, due to oxygen desorption to the gas phase. A two-stage process, involving a-photobioreactor connected-with a gas/liquid mass-transfer-unit showed to be an efficient way to remove CO2 from the biogas, keeping low levels of oxygen in the upgraded biogas. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：102 / 109

页数：8

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