A photochemical fuel cell system using Anabaena N-7363 |
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Authors: | Hiromichi Kayano Isao Karube Tadashi Matsunaga Shuichi Suzuki Ooki Nakayama |
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Institution: | (1) Research Laboratory of Resources Utilization, Tokyo Institute of Technology, Nagatsuta-cho, Midori-ku, 117 Yokohama, Japan;(2) Department of Environmental Engineering, Faculty of Engineering, Yamanashi University, Takeda, Kofu city, Yamanashi, Japan |
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Abstract: | Summary A blue-green algae, Anabaena N-7363, was immobilized in 2% agar gel. The hydrogen productivity of the immobilized algae was three times higher than that of free algae. The maximum hydrogen production rate by the immobilized blue-green algae was 0.52 moles h–1 g–1 (of wet gel) in the medium without nitrogen sources under illumination (10,000 lux). The oxygen evolved was then removed by a reactor containing aerobic bacteria. A photo-current of 15–20 mA was continuously produced for 7 days by the photochemical fuel cell system consisting of the immobilized Anabaena reactor, the oxygen-removing reactor and the hydrogen-oxygen fuel cell. The conversion ratio of hydrogen to current was from 80% to 100%. |
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