Author(s): Hase R, Oikawa H, Sasao C, Morita M, Watanabe Y
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Abstract The photosynthetic productivities of the marine microalgae Chlorophyta sp. and freshwater microalgae Chlorella sp. were investigated in a raceway system under greenhouse conditions in Sendai city. The system was constructed with a surface area of 0.986 m2 and equipped with paddle wheels (8 fins). The semicontinuous batch culture experiment was carried out for 4 months from June to October 1998 in Sendai city. The productivity of Chlorophyta sp. was ranged from 4 to 13 g.m(-2).d(-1) and the average was 8.2 g.m(-2).d(-1), which corresponded to the photosynthetic efficiency of 4.15\% (PAR). The productivity of Chlorella sp. was ranged from 7 to 21 g.m(-2).d(-1) and the average was 13.2 g.m(-2).d(-1), which corresponded to the photosynthetic efficiency of 6.56\% (PAR). These results indicate that stable microalgal cultivation with comparatively high photosynthetic efficiency could be obtained in a raceway system under greenhouse conditions in Sendai city located in the northern part of Japan.
This article was published in J Biosci Bioeng
and referenced in Journal of Membrane Science & Technology