Enhanced acid hydrolysis for bioethanol production from water hyacinth <span style="font-size:15.0pt;font-family:"Times New Roman","serif";mso-fareast-font-family: Calibri;mso-fareast-theme-font:minor-latin;mso-ansi-language:EN-IN;mso-fareast-language: EN-US;mso-bidi-language:HI">(<i>Eichhornia crassipes) </i>using fermentating yeast <i>Candida intermedia </i>NRRL <i>Y-981</i></span>

51-56This study presents bioconversion of water hyacinth (Eichhornia crassipes) to bioethanol using two-sequential steps of acid hydrolysis (10% sulfuric acid) and yeast (Candida intermedia) fermentation. Maximum ethanol yield co-efficient was comparable to those obtained through enzymatic saccharification and fermentation of acid hydrolysate using fully equipped fermentor. A maximum ethanol yield (coefficient, 0.21 g g-1; productivity, 0.010 g l-1h-1) was comparable to predicted value (0.23 g g-1) obtained by CCD (Central Composite Design). Two colorimetric methods (phloroglucinol and dichromate assays) were used for determination of xylose and ethanol using UV-Vis spectrophotometer. Although maximum ethanol concentration was low, an economically efficient overall process was carried out to convert a lignocellulosic biomass to bioethanol