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This work targets the valorization of brewer's spent grain (BSG) waste by ethanol production, providing strategies for increasing titers in the multiple process steps involved. High solid loadings and use of whole slurry from the pretreatment were evaluated, aiming to achieve high ethanol concentration and yield. As variability in BSG chemical composition presents a challenge for their valorization, six different BSGs were chemically characterized, which allowed the selection of two with high polysaccharide content. High solid loadings (up to 25%) were employed for the pretreatment of selected BSGs by autohydrolysis, an environmentally friendly process, to improve enzymatic saccharification and extract fermentable sugars as oligosaccharides and monosaccharides. As a result, high glucose concentrations (43.7 and 57.7 g L) and glucose yield (85.9 and 70.6 %) were obtained from the saccharification of the pretreated BSG whole slurry at 20 and 25% solid loading, respectively. Whole slurries from autohydrolysis were used as substrate for ethanol production by hybrid saccharification and fermentation. Two different Saccharomyces cerevisiae strains were evaluated and high ethanol concentration (42.27 g L) at a high yield (94.0 %) was achieved. The results attained by the combined intensification approaches qualify BSG waste as a valuable renewable resource for cost-effective ethanol production.
This article was published in the following journal.
Name: New biotechnology
This paper studies the production of natural red pigments by CMU001 in the submerged fermentation system using a brewery waste hydrolysate, brewer's spent grain (BSG). The chemical, structural and el...
In this study, utilization of waste cake for bioethanol production via a two-step of enzymatic hydrolysis and ethanol fermentation was developed. At the first step, namely waste cake hydrolysis, effec...
Lignocellulosic biomass is a feedstock with the potential to be converted into value-added bioproducts. The use of enzymatic hydrolysis allows the cleavage of lignocellulose into their monomeric units...
Commercial ethanol production from straw is a series of complex processes that are energy-intensive and uneconomical. Corn straw was used as a bioethanol source to mix with waste activated sludge for ...
This study was done with the aim of lignosulfonate and ethanol production from different spent liquors of bagasse pulping process. For this purpose, alkali lignin from bagasse alkali liquor was separa...
The primary objective of this study is to identify markers of a single meal of whole grain oat and whole grain wheat intake in humans.
The aime of this study is to envsitigate if ethanol has an incretin effect. This is done by administration of ethanol orally vs. an isoethanolaemic i.v. infusion of ethanol.
Systemic and Local Diffusion of Ethanol After Administration of Ethanol 96% Formulated in a Gel and Ethanol 98% Solution by the Percutaneous Route, in Patients With Congenital Venous Malformations:Pharmacokinetic, Pharmacodynamic and Clinical Study.
Absolute ethanol has been used "off-label" as an unmodified formulation (solution) in CVM. Despite its effectiveness, absolute ethanol appears difficult to handle because of its high diffu...
In a double-blind, randomised crossover study, two sourdough croissants (SC) or two brewer's yeast croissants (BC) were served to 17 (9 F; Age range 18-40; BMI range 18-24 kg/m2) healthy s...
A diet rich in whole grain is inversely associated with cardiovascular disease risk and this benefit could be partly attributed to the phenolic acid content of whole grains. The exact abso...
Waste products which, upon release into the atmosphere, water or soil, cause health risks to humans or animals through skin contact, inhalation or ingestion. Hazardous waste sites which contain hazardous waste substances go here.
Liquid, solid, or gaseous waste resulting from mining of radioactive ore, production of reactor fuel materials, reactor operation, processing of irradiated reactor fuels, and related operations, and from use of radioactive materials in research, industry, and medicine. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
A process of waste disposal involving the conversion of green waste (i.e. leaves, organic matter, food waste, manure) into soil-enhancing matter.
SEEDS used as a major nutritional source, most often the grain from the POACEAE family.
Sites that receive and store WASTE PRODUCTS. Some facilities also sort, process, and recycle specific waste products.