Abstract

The optimization of culture tank structure and culturing conditions was investigated using Honda’s own strain of microalgae and a flat panel photobioreactor for the purpose of creating carbon dioxide fixation technology using microalgae capable of repurposing carbon dioxide in the atmosphere as a valuable resource. The aim is to build a carbon-neutral society. The culturing conditions were configured in terms of the concentrations of the nutrient salt components of nitrogen, potassium, and phosphorus. By adopting a flow guide shape that discharges liquid and gas in a single direction, a flow-field velocity of 0.02 m/sec or higher was achieved for the culture solution. This optimization of the culturing conditions successfully increased microalgae production volume. Regarding the culture tank structure, the heat insulating layer structure made it possible to maintain temperatures within the control range throughout the year. The culture tank was also installed at a 45° tilt, which successfully increased the amount of incident light in the culture tank. Outdoor culture tests incorporating these factors yielded an expectation of algae production volume of 13.5 g/m2/day. These results indicate the possibility that DREAMO will be able to achieve ethanol production volume per planted area that is equal to or better than bioethanol from sugarcane, which is a carbon-neutral fuel.

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Author (organization or company)

• Shohei KINOSHITA（Innovative Research Excellence Power Unit & Energy）
• Nozomi FUKUSHIMA（Innovative Research Excellence Power Unit & Energy）
• Mizuho DOI（Innovative Research Excellence Power Unit & Energy）
• Minoru GOTO（Innovative Research Excellence Power Unit & Energy）

Publication Information

Article of Honda R&D Technical Review Vol.34 No.2 (1 - 9)

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