title: Photosynthetic production of microalgal biomass in a raceway system under greenhouse conditions in Sendai city.
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.
authors.affiliation: Research and Development Center, Tohoku Electric Power Co. Inc., 7-2-1 Nakayama, Aoba-ku, Sendai City, Miyagi Prefecture 981-0952, Japan.
authors.forename: R
authors.initials: R
authors.lastname: Hase
authors.forename: H
authors.initials: H
authors.lastname: Oikawa
authors.forename: C
authors.initials: C
authors.lastname: Sasao
authors.forename: M
authors.initials: M
authors.lastname: Morita
authors.forename: Y
authors.initials: Y
authors.lastname: Watanabe