Department of Civil and Environmental Engineering, KAIST, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea.
College of Agriculture, Forestry and Natural Resource Management, University of Hawaii at Hilo, 200 W. Kawili Street, Hilo, HI 96720, USA.
Bioresour Technol. 2017 Jan;224:738-742. doi: 10.1016/j.biortech.2016.11.048. Epub 2016 Nov 16.
This study investigated if an effluent from anaerobic digestion (AD) system can be used as a nutrients source for the microalgae cultivation, and in so doing, if the effluent can be properly treated. Nitrogen and phosphorus in the AD effluent well supported microalgal growth, and their removal efficiency reached >97.9% and 99.2%, respectively. Among four different algal species tested, Micractinium inermum particularly stood out, showing the highest biomass and FAME productivity: 0.16gLd with 3.23gL of dry cell weight, and 0.04gLd with 27.54% (w/w) of FAME contents, respectively. As the concentrations of the nutrients decreased over time, the FAME contents were increased and its quality as well, satisfying several biodiesel quality standards. This study supports that the AD effluent can indeed serve as a cheap and nutrient-rich medium for microalgae cultivation, and equally importantly, microalgae can be a workable treatment option for it.
本研究探讨了厌氧消化(AD)系统的流出物是否可作为微藻培养的营养源,以及在此过程中,流出物是否可以得到适当处理。AD 流出物中的氮和磷非常有利于微藻生长,其去除效率分别达到了>97.9%和 99.2%。在测试的四种不同藻类中,Micractinium inermum 特别突出,表现出最高的生物量和 FAME 生产力:0.16gLd 时达到 3.23gL 的干细胞重量,0.04gLd 时达到 27.54%(w/w)的 FAME 含量。随着时间的推移,养分浓度降低,FAME 含量增加,其质量也得到提高,满足了几个生物柴油质量标准。本研究支持 AD 流出物确实可以作为微藻培养的廉价且富含营养的培养基,同样重要的是,微藻可以成为处理 AD 流出物的可行选择。