Fermentative production of 2,3-Butanediol using bread waste - A green approach for sustainable management of food waste

Article Engineering, Environmental

Enhanced 2,3-Butanediol production by mutant Enterobacter ludwigii using Brewers' spent grain hydrolysate: Process optimization for a pragmatic biorefinery loom

Yassin Amraoui et al.

Summary: This study is the first attempt to produce BDO from BSG. By optimizing the enzymatic hydrolysis conditions of BSG and employing uncontrolled pH strategy during fermentation, efficient production of BDO was achieved.

CHEMICAL ENGINEERING JOURNAL (2022)

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Article Food Science & Technology

Conversion of Food Waste into 2,3-Butanediol via Thermophilic Fermentation: Effects of Carbohydrate Content and Nutrient Supplementation

Dajun Yu et al.

Summary: This study investigated the effects of sugar and nutrient concentrations on the production of 2,3-butanediol through thermophilic fermentation of food waste. Excessive glucose in glucose media slowed down the fermentation process, while low nutrient concentrations led to fermentation failure. However, when food waste media were used, bacteria were able to consume sugars and produce 2,3-butanediol under low nutrient conditions.

FOODS (2022)

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Review Biotechnology & Applied Microbiology

Prospects on bio-based 2,3-butanediol and acetoin production: Recent progress and advances

Sofia Maina et al.

Summary: This review summarizes the applications of bio-based platform chemicals 2,3-butanediol (BDO) and acetoin in various industries, as well as the novel technological developments in genetic and metabolic engineering strategies for their production. The review also discusses the valorization of renewable feedstocks and the development of bioprocesses for the production of BDO and acetoin. Techno-economic aspects evaluating the viability and industrial potential of bio-based BDO production are presented.

BIOTECHNOLOGY ADVANCES (2022)

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Article Energy & Fuels

High-Level fermentative production of Lactic acid from bread waste under Non-sterile conditions with a circular biorefining approach and zero waste discharge

Rylan Cox et al.

Summary: Bread waste is a severe problem in Europe, but it can be transformed into lactic acid and solid residues that can be used for biogas production. This study demonstrates the potential of an integrated biorefinery based on bread waste, with high lactic acid titer and biogas production.

FUEL (2022)

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Article Thermodynamics

Process optimization for recycling of bread waste into bioethanol and biomethane: A circular economy approach

Vivek Narisetty et al.

Summary: In this study, bread waste was used as a feedstock for fermentative production of ethanol and biomethane. Glucose was obtained by acid and enzymatic saccharification of bread waste, and then fermented into ethanol. The solid residue after fermentation was subjected to anaerobic digestion to produce biomethane. The study showed that bread waste is a promising feedstock for sustainable biofuel production.

ENERGY CONVERSION AND MANAGEMENT (2022)

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Article Energy & Fuels

Process optimization for dilute acid and enzymatic hydrolysis of waste wheat bread and its effect on aflatoxin fate and ethanol production

Samane Torabi et al.

Summary: The hydrolysis of waste wheat bread using amylolytic enzymes and dilute hydrochloric acid was studied, yielding the highest glucose yield of 69.8% and 93% under specific conditions, respectively. Both dilute acid and enzymatic hydrolysis showed efficient removal of aflatoxin B1, with potential ethanol production of 86.9% and 83.0% of theoretical yields.

BIOMASS CONVERSION AND BIOREFINERY (2021)

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Article Engineering, Chemical

Bioprocess Development for 2,3-Butanediol Production by Paenibacillus Strains

Daniel Tinoco et al.

Summary: This review focused on the fermentation potential of Paenibacillus species in the production of 2,3-butanediol, highlighting key fermentation parameters, metabolic pathways, and available carbon sources. The discussion also included downstream separation and purification processes for bio-based 2,3-BDO recovery, as well as the potential for high stereoisomeric purity isomers to open up new applications and markets. Paenibacillus strains were proposed as a viable alternative to biosafety level 2 strains for 2,3-BDO production.

CHEMBIOENG REVIEWS (2021)

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Article Agricultural Engineering

Volumetric oxygen transfer coefficient as fermentation control parameter to manipulate the production of either acetoin or D-2,3-butanediol using bakery waste

Sofia Maina et al.

Summary: The production of acetoin and D-BDO by Bacillus amyloliquefaciens cultivated on bakery waste hydrolysates can be influenced by varying the volumetric oxygen transfer coefficient (kLa). Batch fermentations with different kLa values were found to have significant impact on the production yields and rates, with fed-batch cultures at higher kLa values leading to combined production of acetoin, meso-BDO and D-BDO. The results suggest that manipulating the kLa value can redirect bacterial metabolism towards higher acetoin or D-BDO production during fermentation in crude bakery waste hydrolysates.

BIORESOURCE TECHNOLOGY (2021)

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Article Chemistry, Multidisciplinary

Integrated Fermentative Production and Downstream Processing of 2,3-Butanediol from Sugarcane Bagasse-Derived Xylose by Mutant Strain of Enterobacter ludwigii

Yassin Amraoui et al.

Summary: This study evaluated a mutant strain of Enterobacter ludwigii for 2,3-butanediol (BDO) production using pure xylose and xylose-rich hydrolysate. Supplementation with yeast extract improved cell growth and BDO production. Batch cultures with pH control and a new separation method achieved high BDO recovery from xylose and hydrolysate.

ACS SUSTAINABLE CHEMISTRY & ENGINEERING (2021)

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Article Biotechnology & Applied Microbiology

Highly Efficient 2,3-Butanediol Production by Bacillus licheniformis via Complex Optimization of Nutritional and Technological Parameters

Lidia Tsigoriyna et al.

Summary: By optimizing medium and process parameters, the study successfully utilized the abilities of Bacillus licheniformis 24 as a non-pathogenic, cellulolytic strain to produce high yields of 2,3-Butanediol.

FERMENTATION-BASEL (2021)

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Review Chemistry, Physical

Recycling bread waste into chemical building blocks using a circular biorefining approach

Vivek Narisetty et al.

Summary: Food waste, particularly bread waste, is a significant global issue causing environmental harm and economic losses. Bread, rich in easily extractable fermentable sugars, presents an opportunity for novel commercial processes.

SUSTAINABLE ENERGY & FUELS (2021)

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Article Engineering, Environmental