Recently, microalgae-based biofuels received
increasing attention because microalgae offer numerous advantages compared to
the terrestrial plants, such as the higher photosynthetic efficiencies which
result in higher growth rates, high ability of CO2 mitigation
using flue gas, possibility of cultivation on arid lands and their ability to
grow in fresh, marine or wastewater. In a recent study published by new
energy teamwork at Jiangsu University, a novel approach of using growth medium
with different substitutions of biodiesel industry byproducts, lipid-free algal
hydrolysate and/or waste glycerol, for enhanced biodiesel production from the
green microalga Scenedesmus obliquus was investigated. Combination
of different concentrations of WG with 15% LFAH showed the maximum significant
biomass productivity, which represented 27.4, 30.5 and 28.9% over the control
at combined 5, 10 and 20 g L-1 WG, respectively. However,
combinations of different LFAH with 20 g L-1 WG showed the
maximum significant lipid accumulation. However, lipid productivity showed its
maximum significant value of 59.66 mg L-1d-1 using
LFAH15-WG10. In addition, LFAH15-WG10 significantly enhanced total biodiesel
(FAMEs) yield by 21.2% over the control. Moreover, it reduced
polyunsaturated fatty acids (PUFAs) ratio from 52.1% to 47.8% of total FAMEs
and increased monounsaturated fatty acids (MUFAs) ratio from 26.6% to 31.3% of
total FAMEs.
The research team concluded
that their study suggested a successful innovative technology in which the
combination of lipid-free algal hydrolysate and waste glycerol can be used for
microalgae cultivation on wastewater to enhance both biomass, lipids and
biodiesel production. It could not only enhance biodiesel production, but also
manage wastes from microalgae-based biodiesel industry.
New Energy Department
Jiangsu University
China
2 comments:
I'm impressed with these results and the published paper. It will has a great impact on the future of biodiesel industry and by-products recycling, especially from microalgae. Have you tried another residual biomass from commonly used feedstocks? Thanks for sharing
Dear Colleague,
Thank you very much for your comment and suggesting a very interesting point as extension to our work. My major is Phycology and, therefore, we focused on microalgal biomass. But I think it will be of interest to study the influence of other biomasses such as seaweeds and/or lignocelluloses. Your comment is highly appreciated. Please contact me privately at abomohra@yahoo.com.
Many thanks
Sincerely yours,
Abomohra
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