Assessment the Potentials of Three Microalgal Strains for the Production of Bioethanol
A.M. Danjuma
*
Department of Applied Chemistry, Umaru Ali Shinkafi Polytechnic Sokoto, College of Science and Technology, Nigeria.
A. Saadu
Department of General Studies, College of Agriculture and Animal Science, Wurno, Sokoto State, Nigeria.
M. Yusuf
Department of General Studies, College of Nursing Sciences Tambuwal, Nigeria.
M.B. Shagari
Department of Science Laboratory Technology, Umaru Ali Shinkafi Polytechnic Sokoto, College of Science and Technology, Nigeria.
*Author to whom correspondence should be addressed.
Abstract
Microalgal biomass has been widely reported as great source of feed, food, biofuels, and pigments. Suitable microalgae species for particular industrial application are selected on the basis of its growth rates, productivity, adaptability to the laboratory conditions, pigments concentrations, and proximate profiles. Understanding the growth pattern of microalgae is crucial because it is the primary step for any kind of operational procedure mostly biomass extractions. Present study focused on four different indigenous microalgae species (Chlorella sp., Chlorella sorokiniana, and Microcystic aeroguinosa sp.). The F2-medium was used for the culture of microalgal strains. Optical densities were measured using UV-spectrophotometer to analyze the growth curve. C. vulgaris showed greater growth curve among the other two strains. Association of Official Analytical Collaboration was adapted to analyze the proximate composition. However, One-way Anova was used to determine the significant difference between and within the proximate parameters of the samples. Ultra Violet-spectrophotometer was used to analyze the starch concentration and reducing sugar concentration respectively. The three strains were observed to be good substrate for the production of bioethanol but C. vulgaris had the best biomass for the production of bioethanol having the highest carbohydrate composition of 43.46±0.71%. M. aeroguinosa standout to to be perfect biomass for the production biodiesel having the highest lipid composition of 40.77±0.39%. two-way anova revealed that all the proximate parameters were not significantly significant showing P-value of less than 0.05 for all the microalgal starins. Having highest reducing sugar concentration of 7.71mg/ml for enzymatic hydrolysis and starch quantity of 251.33mg/g for C. vulgaris, the microalgal biomass showed great potential production of bioethanol.
Keywords: Microalgal, strains, bioethanol, chlorella