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Volume 7, Issue 5 (Suppl)
J Biotechnol Biomater
ISSN: 2155-952X JBTBM, an open access journal
Biotechnology 2017
November 13-14, 2017
November 13-14, 2017 Osaka, Japan
19
th
World Congress on
Biotechnology
Biodiesel production from edible oil wastewater sludge with bioethanol using nano-magnetic catalysis
Wighens Ngoie Ilunga, Pamela J Welz, Olewaseun O Oyekola and Daniel Ikhu-Omoregbe
Cape Peninsula University of Technology, South Africa
C
urrently, most sludge from the wastewater treatment plants of edible oil factories is disposed to landfills, but landfill
sites are finite and potential sources of environmental pollution. Production of biodiesel from wastewater sludge can
contribute to energy production and waste minimization. However, conventional biodiesel production is energy and waste
intensive. Generally, biodiesel is produced from the transesterification reaction of oils with alcohol (i.e. Methanol, ethanol) in
the presence of a catalyst. Homogeneously catalyzed transesterification is the conventional approach for large scale production
of biodiesel as reaction times are relatively short. Nevertheless, homogenous catalysis presents several challenges such as high
probability of soap formation in the presence of water and free fatty acids and difficulty of separation and reusability. The
current study aimed to reuse wastewater sludge from the edible oil industry as a novel feedstock for both monounsaturated
fats and bioethanol for the production of biodiesel. Preliminary results have shown that the fatty acid profile of the oilseed
wastewater sludge is favorable for biodiesel production with 48% (w/w) monounsaturated fats and that the residue left after
the extraction of fats from the sludge contains sufficient fermentable sugars after steam explosion followed by an enzymatic
hydrolysis for the successful production of bioethanol [29% (w/w)] using a commercial strain of
Saccharomyces cerevisiae
.
A novel nano-magnetic catalyst was synthesized from mineral processing alkaline tailings, mainly containing dolomite
originating from cupriferous ores using a modified sol-gel technique. Both the catalytic properties and reusability of the catalyst
were investigated. A maximum biodiesel yield of 64% was obtained, which dropped to 52% after the fourth transesterification
reaction cycle. The proposed approach has the potential to reduce material costs, energy consumption and water usage
associated with conventional biodiesel production technologies. It may also mitigate the impact of conventional biodiesel
production on food and land security, while simultaneously reducing waste.
wghngoie@gmail.comJ Biotechnol Biomater 2017, 7:5 (Suppl)
DOI: 10.4172/2155-952X-C1-083