Isolation and determination of cultural characteristics of microalgae which functions under CO2 enriched atmosphere

A fresh-water microalgae, which functions under CO2 enriched atmosphere conditions, was isolated and its cultural characteristics were investigated. The HA-1 strain, identified as genus Chlorella, was newly isolated from a paddy field by an enrichment culture using reproduced stack gases from a thermal power plant with a concentration of CO2 and O2 of 15% and 2% respectively. It showed maximum growth at 10% CO2 enriched air flowing condition, and showed a good growth rate in a broad range of physically controllable conditions, including CO2 enriched air flow rate, temperature and pH value. The results indicated the feasibility of the HA-1 strain for mass cultivation using stack gases.