Carbon Dioxide Fixation and α-Linolenic Acid Production by the Hot-Spring Alga Cyanidium caldarium

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Masamichi Akimoto¹  Kazuhisa Ohtaguchi¹  Kozo Koide¹  Tetsuya Ohara¹ 

[1] Department of Chemical Engineering, Tokyo Institute of Technology

关键词: Biochemical Engineering;    Environment;    Carbon Dioxide;    Alga;    Cyanidium caldarium;    Polyunsaturated Fatty Acid;    α-Linolenic Acid;    Anti-Tumor Agent;    Anti-Allergic Agent;   

DOI  :  10.1252/jcej.27.329

来源: Maruzen Company Ltd

【 摘 要 】

References(24)Cited-By(7)Focusing on CO2 fixation and α-linolenic acid (ALA) production, photoautotrophic cultivation of the hot-spring alga Cyanidium caldarium was investigated using Allen’s medium under a 5% CO2-enriched atmosphere. Although the growth rate was maximum at ca. 40°C, the optimum cultivation conditions (temperature, H+ concentration in the medium and light intensity) for ALA production were found to be 30°C, pH 2.0–4.0 and ca. 10,000 lux respectively. Simulation of a chemostat cultivation at these optimum conditions showed that the rates of CO2 fixation and of ALA production could reach 0.75 kg- CO2/(kg-cells·d) and 5.44 g-ALA/(kg-cells·d), respectively, in the exponential phase. This rate of CO2 fixation corresponded to 0.030 kg-CO2/(m3·h) at a cell concentration of 0.96 kg/m3. This activity of C. caldarium for CO2 fixation was comparable to that of blue-green algae and was 10 to 100 times greater than that of green plants. Thus, C. caldarium was shown to be useful for the fixation of CO2.

【 授权许可】

Unknown