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Title 

Higher biomass productivity of microalgae in an attached growth system, using wastewater

 

폐수를 이용한 부착조류 배양 시스템의 향상된 바이오매스 생산성

Authors 

Seung Hoon LeeHee-Mock OhBeom Ho JoS A LeeSang Yoon ShinHee-Sik KimS H LeeChi-Yong Ahn

Publisher 

The Korean Society for Applied Microbiology

Issue Date 

2014

Citation 

Journal of Microbiology and Biotechnology, vol. 24, no. 11, pp. 1566-1573

Keywords 

Attached growthBiodieselCultivationMicroalgaeWastewater

Abstract 

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-1and 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.

ISSN 

1017-7825

Link 

http://dx.doi.org/10.4014/jmb.1406.06057

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2017-04-19


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