Microalgae are the highest potential energy yield plants and produce 8 to 120 times larger amount of oils than those of terrestrial oil crop plants, because they contained 12.5-72% total lipids (% of total dry weight). Effective liquid fuel production from microalgae has been studied using Botryococcus braunii, a green colonial microalga characterized by a considerable production of lipids, notably hydrocarbons. The strains of this alga differ in the type of hydrocarbons they synthesize and accumulate, in the amount of lipid production and in the growth capacity. So the acquisition of the strains with high lipid production and growth rate is requested for utilization of this alga for fuel production. The growth and lipid production of this alga were enhanced by the addition of pre-treated domestic and industrial wastewater under the light conditions. The use of industrial flue gas to supply cultures of B. braunii with CO2 was possible supported by the tolerance of B. braunii towards some pollutants such as sulfite and bisulfite. Supposed that B. braunii is grown and harvested in the large scale culture pond (19 ha), LCA showed that an amount of acquired energy was about 3 times higher than that of consumed energy, resulting in plus energy balance. It is the true in the case of CO2. However, the charged cost was 3 times higher than gained cost. If we set and managed this system in Indonesia which has cheap personnel costs and cheap lighting, heating and water expenses, the gained cost is higher than the charged cost. So it is possible to improve the economy of algal fuel even in developed countries by future development of technology.
키워드
Botryococcuslarge scale culturelipid
저자
Makoto M. WATANABE [ Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan. ]
한국생물공학회 [The Korean Society for Biotechnology and Bioengineering]
설립연도
1984
분야
공학>생물공학
소개
이 법인은 생물 공학의 발전과 보급에 이바지하고, 회원 상호 간의 연구 협력과 친목을 도모함을 목적으로 한다
1. 생물공학 분야의 발전을 위한 연구 협력
2. 생물공학의 실용화를 촉진시키기 위한 산학 협동
3. 학술연구 발표회, 강연회, 연수회 등 학술활동의 개최
4. 국,영문 학술지,소식지,학술회의 Proceedings 및 학술도서의 발간
5. 생물공학 발전을 위한 정책 건의
6. 기타 국제 교류 등 본 학회의 목적 달성을 위한 제반 활동