Lee, Seung-Hoon Oh, Hee-Mock Jo, Beom-Ho Lee, Sang-A Shin, Sang-Yoon Kim, Hee-Sik Lee, Sang-Hyup Ahn, Chi-Yong 2024-01-20T08:32:04Z 2024-01-20T08:32:04Z 2022-01-25 2014-11 1017-7825 https://pubs.kist.re.kr/handle/201004/126143 Although most algae cultivation systems are operated in suspended culture, an attached growth system can offer several advantages over suspended systems. Algal cultivation becomes light-limited as the microalgal concentration increases in the suspended system; on the other hand, sunlight penetrates deeper and stronger in attached systems owing to the more transparent water. Such higher availability of sunlight makes it possible to operate a raceway pond deeper than usual, resulting in a higher areal productivity. The attached system achieved 2.8-times higher biomass productivity and total lipid productivity of 9.1 g m(-2) day(-1) and 1.9 g m(-2) day(-1), respectively, than the suspended system. Biomass productivity can be further increased by optimization of the culture conditions. Moreover, algal biomass harvesting and dewatering were made simpler and cheaper in attached systems, because mesh-type substrates with attached microalgae were easily removed from the culture and the remaining treated wastewater could be discharged directly. When the algal biomass was dewatered using natural sunlight, the palmitic acid (C16:0) content increased by 16% compared with the freeze-drying method. There was no great difference in other fatty acid composition. Therefore, the attached system for algal cultivation is a promising cultivation system for mass biodiesel production. English KOREAN SOC MICROBIOLOGY & BIOTECHNOLOGY Higher Biomass Productivity of Microalgae in an Attached Growth System, Using Wastewater Article 10.4014/jmb.1406.06057 1 JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY, v.24, no.11, pp.1566 - 1573 JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY 24 11 1566 1573 N scie scopus kci ART001928775 000345554200015 2-s2.0-84910635581 Biotechnology & Applied Microbiology Microbiology Biotechnology & Applied Microbiology Microbiology Article LIPID PRODUCTION LIGHT-INTENSITY FATTY-ACID BIODIESEL RECOVERY EXTRACTION BIOFUELS Microalgae cultivation attached growth wastewater biodiesel