文章基本信息

标题：Auto-flotation of heterocyst enables the efficient production of renewable energy in cyanobacteria
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作者：Ming Chen ; Jihong Li ; Lei Zhang 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：4
期号：1
DOI：10.1038/srep03998
语种：English
出版社：Springer Nature
摘要：Utilizing cyanobacteria as a bioenergy resource is difficult due to the cost and energy consuming harvests of microalgal biomass. In this study, an auto-floating system was developed by increasing the photobiological H₂ production in the heterocysts of filamentous cyanobacteria. An amount of 1.0 μM of diuron, which inhibited O₂ production in cyanobacteria, resulted in a high rate of H₂ production in heterocysts. The auto-floating process recovered 91.71% ± 1.22 of the accumulated microalgal biomass from the liquid media. Quantification analysis revealed that 0.72–1.10 μmol H₂ per mg dry weight microalgal biomass was necessary to create this auto-floating system. Further bio-conversion by using anaerobic digestion converted the harvested microalgal biomass into biogas. Through this novel coupled system of photobiological H₂ production and anaerobic digestion, a high level of light energy conversion efficiency from solar energy to bioenergy was attained with the values of 3.79% ± 0.76.