P35-05 海水性微細藻を用いた CO_2 固定とエタノール生産

概要

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Microalgae were screened from seawater for CO_2 fixation and ethanol production by self-fermentation and measured for their growth rate, starch content, and conversion rate from starch to ethanol. More than 250 strains were isolated, and some of them were found to be suitable properties for the objectives. One of the excellent strains, Chlamydomonas perigranulata YA-SH-1,which was named as a new species showed (1) a growth rate of 30g/m^2・d, (2) a starch content of 30% (dry base), (3) a conversion rate from intracellular starch to ethanol of 50% in the dark and anaerobic condition. Proposed new ethanol production system consists of microalgal cultivation, alagal cells' harvest, self-fermentation of algae, and ethanol extraction processes. The system seems more simple and less energy cosuming compared with the conventional one. If the microalgal potentialities such as microalgal productivity, starch content, and ethanol conversion are improved, the system should be an effective means for CO_2 fixation and energy production using microalgal biomass.
社団法人日本機械学会の論文
2002-06-14