| 초록 |
CCU (CO2 capture and utilization) is a process that uses waste CO2 as a chemical feedstock for the synthesis of commercially viable products such as bio-oils, chemicals, fertilizers and fuels. The process can contribute to reducing CO2 emissions by at least 3.7 Gt/year (approximately 10 % of total current annual CO2 emissions) and is divided into three groups: mineral carbonation, biological conversion and chemical conversion. Among three groups in CCU process, microalgal culture system is the most widely used for biological CO2 conversion than a land plant. This is due to microalgae have higher photosynthetic efficiency (CO2 fixation rate), and greater abilities to capture light and convert CO2 to high-value products (astaxanthin, β-carotene, and functional protein) than land plants. Strain improvement (upstream process) and process development (midstream and downstream processes) are core factors for economically feasible CO2 reduction using microalgal culture system. |
