Comparative energy life-cycle analyses of microalgal biomass production in open ponds and photobioreactors

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• 作者：Orl ; o Jorquera ; Asher Kiperstok ; Emerson A. Sales ; Marcelo Embiru&#xe7 ; u ; Maria L. Ghirardi
• 关键词：Photobioreactors ; Oil production ; Microalgae ; Life-cycle analysis ; Energy
• 刊名：Bioresource Technology
• 出版年：2010
• 出版时间：February 2010
• 年：2010
• 卷：101
• 期：4
• 页码：1406-1413
• 全文大小：651 K

文摘

An analysis of the energy life-cycle for production of biomass using the oil-rich microalgae Nannochloropsis sp. was performed, which included both raceway ponds, tubular and flat-plate photobioreactors for algal cultivation. The net energy ratio (NER) for each process was calculated. The results showed that the use of horizontal tubular photobioreactors (PBRs) is not economically feasible ([NER] < 1) and that the estimated NERs for flat-plate PBRs and raceway ponds is >1. The NER for ponds and flat-plate PBRs could be raised to significantly higher values if the lipid content of the biomass were increased to 60 % dw/cwd. Although neither system is currently competitive with petroleum, the threshold oil cost at which this would occur was also estimated.