Lookup NU author(s): Dr Sharon Velasquez Orta,
Professor Adam Harvey,
Professor Maria Orta Ledesma
Full text for this publication is not currently held within this repository. Alternative links are provided below where available.
This paper describes a process for producing biodiesel sustainably from microalgae grown on wastewater, whilst significantly reducing the wastewater’s nutrients and total coliform. Furthermore, ozone-flotation harvesting of the resultant biomass was investigated and shown to be viable, and to result in FAMEs of greater oxidation stability. Desmodesmus sp. and 2 mixed cultures were successfully grown on wastewater. Desmodesmus sp. grew more rapidly, to a higher maximum biomass concentration of 0.58 g/L. A native mixed culture dominated by Oscillatoria and Arthrospira, reached 0.45 g/L and exhibited the highest lipid and FAME yield. The FAME obtained from ozone-flotation exhibited greater oxidative stability, as the degree of saturation was higher. In principle ozone could therefore be used as a combined method of harvesting and reducing unsaturation. During microalgae treatment, the total nitrogen in the wastewater was reduced by 55.4 – 83.9%. More importantly, total coliform removal was as high as 99.8%.
Author(s): Oladapo K, Velasquez Orta SB, Monje-Ramirez I, Yáñez Noguez I, Harvey AP, Orta Ledesma MT
Publication type: Article
Publication status: Published
Journal: Bioresource Technology
Print publication date: 18/12/2013
ISSN (print): 0960-8524
ISSN (electronic): 1873-2976
Publisher: Elsevier BV
Altmetrics provided by Altmetric