Scenedesmus-based treatment of nitrogen and phosphorus from effluent of anaerobic digester and bio-oil production

作者：Kim Ga Yeong; Yun Yeo Myeong; Shin Hang Sik; Kim Hee Sik; Han Jong In^*

来源：Bioresource Technology, 2015, 196: 235-240.

DOI：10.1016/j.biortech.2015.07.091

• Anaerobic digestion
• Nitrogen removal
• Phosphorus removal
• Biodiesel
• Scenedesmus sp.

In this study, a microalgae-based technology was employed to treat wastewater and produce biodiesel at the same time. A local isolate Scenedesmus sp. was found to be a well suited species, particularly for an effluent from anaerobic digester (AD) containing low carbon but high nutrients (NH3-N = 273 mg L-1, total P = 58.75 mg L-1). This algae-based treatment was quite effective: nutrient removal efficiencies were over 99.19% for nitrogen and 98.01% for phosphorus. Regarding the biodiesel production, FAME contents of Scenedesmus sp. were found to be relatively low (8.74% (w/w)), but overall FAME productivity was comparatively high (0.03 g L-1 d(-1)) due to its high biomass productivity (0.37 g L-1 d(-1)). FAMEs were satisfactory to the several standards for the biodiesel quality. The Scenedesmus-based technology may serve as a promising option for the treatment of nutrient-rich wastewater and especially so for the AD effluent.

• 出版日期2015-11