11 research outputs found
Toxic effect assessment of aminotetrazoles and high-energetic azotetrazole salts on soil microbial respiration
Magnetic Carbon Nanofibers from Horse Manure via Hydrothermal Carbonization for Methylene Blue Adsorption
Decolorization of synthetic textile dyes by laccase from newly isolated Trametes hirsuta
Impacts of holmium and lithium to the growth of selected basidiomycetous fungi and their ability to degrade textile dyes
Optimization of enzymatic biodiesel synthesis using RSM in high pressure carbon dioxide and its scale up
Tolerance of Saccharomyces cerevisiae K35 to Lignocellulose-derived Inhibitory Compounds
The hydrolysis which converts polysaccharides to the fermentable sugars for yeast's lingocellulosic ethanol production also generates byproducts which inhibit the ethanol production. To investigate the extent to which inhibitory compounds affect yeast's growth and ethanol production, fermentations by Saccharomyces cerevisiae K35 were investigated in various concentrations of acetic acid, furfural, 5-hydroxymethylfurfural (5-HMF), syringaldehyde, and coumaric acid. Fermentation in hydrolysates from yellow poplar and waste wood was also studied. After 24 h, S. cerevisiae K35 produced close to theoretically predicted ethanol yields in all the concentrations of acetic acid tested (1 similar to 10 g/L). Both furans and phenolics inhibited cell growth and ethanol production. Ethanol yield, however, was unaffected, even at high concentrations, except in the cases of 5 g/L of syringaldehyde and coumaric acid. Although hydrolysates contain various toxic compounds, in their presence, S. cerevisiae K35 consumed close to all the available glucose and yielded more ethanol than theoretically predicted. S. cerevisiae K35 was demonstrated to have high tolerance to inhibitory compounds and not to need any detoxification for ethanol production from hydrolysatesclos