Journal
BIORESOURCE TECHNOLOGY
Volume 196, Issue -, Pages 235-240Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.07.091
Keywords
Anaerobic digestion; Nitrogen removal; Phosphorus removal; Biodiesel; Scenedesmus sp.
Funding
- Advanced Biomass R&D Center (ABC) through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [NRF-2011-0031348]
- National Research Foundation of Korea (NRF) - Korea government Ministry of Education, Science and Technology (MEST) [NRF-2012M1A2A2026587]
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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. (C) 2015 Elsevier Ltd. All rights reserved.
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