Phycoremediation of cassava wastewater by Desmodesmus armatus and the concomitant accumulation of lipids for biodiesel production

The present study investigated the coupling of phycoremediation of harmful and malodorous cassava wastewater by Desmodesmus armatus with the biosynthesis of fatty acid methyl esters (FAMEs). Cultivation of the microalga on hydrolysed cassava wastewater + Bold's basal medium led to a reduction o...

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Bibliographic Details
Published in:Bioresource technology reports 2019-09, Vol.7, p.100255, Article 100255
Main Authors: Okpozu, Otsai Otsima, Ogbonna, Innocent Okonkwo, Ikwebe, Joseph, Ogbonna, James Chukwuma
Format: Article
Language:English
Subjects:
Biodiesel
Cassava wastewater
Desmodesmus armatus
Fatty acid methyl esters
Phycoremediation
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Summary:The present study investigated the coupling of phycoremediation of harmful and malodorous cassava wastewater by Desmodesmus armatus with the biosynthesis of fatty acid methyl esters (FAMEs). Cultivation of the microalga on hydrolysed cassava wastewater + Bold's basal medium led to a reduction of total dissolved solids (TDS) by 72% (548.8 mg L−1), electrical conductivity (EC) by 73% (998.1 μs cm−1), biochemical oxygen demand (BOD) by 76% (136.20 mg L−1) and chemical oxygen demand (COD) by 74% (407.73 mg L−1) under heterotrophic mode. Mixotrophic growth mode showed a reduction in TDS by 83% (352.8 mg L−1), EC by 83% (621.92 s m−1), BOD by 87% (73.56 mg L−1) and COD by 92% (121.83 mg L−1). Biomass productivity of 70.83 mg L−1d−1 (mixotrophy) was significantly (p 
ISSN:2589-014X
2589-014X
DOI:10.1016/j.biteb.2019.100255