Effect of Zinc oxide Nanoparticles on Hyacinth's Fermentation

Abstract

Abstract: In this study bio-hydrogen and bioethanol were produced from dry biomass of water hyacinth by microbial fermentation under influence of zinc oxide nanoparticles. For fermentative bio-hydrogen production biomass was first pretreated and then saccharified into fermentable sugars by enzymes. Sugars of enzymatic hydrolysis were xylose and glucose with concentration of 9.0% and 8.0% respectively. For bioethanol production dry plant was saccharified. The reducing sugar obtained in this method containing 5% glucose. The effect of zinc oxide nanoparticles on fermentative hydrogen and ethanol production from water hyacinth biomass was investigated in batch tests by mixed culture and yeast Saccharomyces cerevisiae respectively. Results showed that the specific concentration of zinc oxide nanoparticles decreased the hydrogen yield. Ethanol yield was enhanced by zinc oxide nanoparticles by using it in certain concentration range during fermentation. The maximum ethanol yield of 0.0193g/g of dry weight plant biomass was obtained at concentration of 5 mg/L of zinc oxide nanoparticles. The ethanol yield constitutes 75.68% of the maximum theoretical yield at zinc oxide nanoparticles