Towards sequential bioethanol and l-lactic acid co-generation: Improving xylose conversion to l-lactic acid in presence of lignocellulosic ethanol with an evolved Bacillus coagulans

Cubas-Cano, Enrique; López‐Gómez, José Pablo; González‐Fernández, Cristina; Ballesteros, Ignacio; Tomás‐Pejó, Elia

doi:10.1016/j.renene.2020.02.066

Cited by 33 publications

(4 citation statements)

References 31 publications

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“…Raud et al reported values of 22.96%, 6.89%, and 22.73% for cellulose, hemicellulose, and lignin content [24], respectively. Cubas et al reported values of 24.8%, 15.7%, and 21.6% for cellulose, hemicellulose, and lignin content, respectively [25]. Values up to 18.9% extract content have also been reported [26].…”

Section: Raw Materials Compositionmentioning

confidence: 98%

Sugars Production from Municipal Forestry and Greening Wastes Pretreated by an Integrated Steam Explosion-Based Process

et al. 2020

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Increasing awareness of resource sustainability and waste management has led to the search for solutions while promoting circular economy principles. Among all kinds of lignocellulosic biomass available, one with growing interest is municipal forestry and greening waste (MFGW). MFGW makes up an important part of waste streams of municipal solid waste and is a potential feedstock for biological conversion in a lignocellulosic biorefinery. This work studied the fermentable sugars production from MFGW after steam explosion (SE) pretreatment combined with other pretreatments such as dilute acid, organosolv, and metal salts. A range of pretreatment conditions was evaluated according to different parameters: sugars recovery, degradation product generation, and enzymatic hydrolysis yield. At selected pretreatment conditions (diluted acid plus SE, 195 °C, 10 min, and 60 mg H2SO4/g MFGW), 77% of potential sugars content in MFGW was obtained. The effect of solids loading and enzyme dose on glucose release and glucose yield on enzymatic hydrolysis were also determined. Up to 70% of the main sugars in the MFGW were recovered for the coupled pretreatment and enzymatic hydrolysis (45 FPU/g glucan enzyme loading and 20% dry matter solid consistency), resulting in 80 g/L glucose that could be further utilized for ethanol production.

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Section: Raw Materials Compositionmentioning

confidence: 98%

Sugars Production from Municipal Forestry and Greening Wastes Pretreated by an Integrated Steam Explosion-Based Process

et al. 2020

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“…Weizmannia coagulans could act as a potential probiotic with regard to its ability to be strongly tolerant to stomach acid, cholic acid, and other harsh environments. Its habitat has been recorded to occur in canned evaporated milk [32], industrial wastewater drainage [33], bean processing waste [6], lignocellulosic biomass [34], and soil (this study). Weizmannia coagulans strains MA45, P13, and S5 were evaluated for their potential in the production of various cellulolytic enzymes in the following experiments.…”

Section: Biochemcial Characterization and Molecular Identification Of...mentioning

confidence: 85%

Lignocellulose Degrading Weizmannia coagulans Capable of Enantiomeric L-Lactic Acid Production via Consolidated Bioprocessing

et al. 2023

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Second-generation lactic acid production requires the development of sustainable and economically feasible processes and renewable lignocellulose biomass as a starting raw material. Weizmannia coagulans MA42 was isolated from a soil sample in Chiang Mai province, Thailand and showed the highest production of L-lactic acid and lignocellulolytic enzymes (cellulase, β-mannanase, xylanase, β-glucosidase, β-mannosidase, and β-xylosidase) compared to other isolates. Weizmannia coagulans MA42 was able to grow, secrete lignocellulolytic enzymes, and directly produce L-lactic acid in the medium containing various lignocellulosic feedstocks as the sole carbon source. Moreover, L-lactic acid production efficiency was improved after the substrates were pretreated with diluted sulfuric acid and diluted sodium hydroxide. The highest L-lactic acid production efficiency of 553.4 ± 2.9, 325.4 ± 4.1, 326.6 ± 4.4, 528.0 ± 7.2, and 547.0 ± 2.2 mg/g total available carbohydrate was obtained from respective pretreated substrates including sugarcane bagasse, sugarcane trash, corn stover, rice straw, and water hyacinth. It is suggested that structural complexity of the lignocellulosic materials and properties of lignocellulolytic enzymes are the key factors of consolidated bioprocessing (CBP) of lignocellulosic feedstocks to lactic acid. In addition, the results of this study indicated that W. coagulans MA42 is a potent bacterial candidate for CBP of a variety of lignocellulosic feedstocks to L-lactic acid production; however, further bioprocess development and genetic engineering technique would provide higher lactic acid production efficiency, and this would lead to sustainable lactic acid production from lignocellulosic feedstocks.

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“…6,22,23 Lactic acid (LA) is a vital commodity chemical that is included in the revised list of platform chemicals by the US Department of Energy. [24][25][26] LA is one of the top ten biochemicals in the UK based on its commercial viability, functionality, and sustainability. 27 As a platform chemical, LA can be transformed into a wide range of high-value products, such as propylene glycol, propylene oxide, lactic and acrylic acid esters, and others.…”

Section: Introductionmentioning

confidence: 99%

Lactic acid and biomethane production from bread waste: a techno-economic and profitability analysis using pinch technology

Mailaram

Narisetty

Maity

et al. 2023

Sustainable Energy Fuels

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Towards sequential bioethanol and l-lactic acid co-generation: Improving xylose conversion to l-lactic acid in presence of lignocellulosic ethanol with an evolved Bacillus coagulans

Cited by 33 publications

References 31 publications

Sugars Production from Municipal Forestry and Greening Wastes Pretreated by an Integrated Steam Explosion-Based Process

Sugars Production from Municipal Forestry and Greening Wastes Pretreated by an Integrated Steam Explosion-Based Process

Lignocellulose Degrading Weizmannia coagulans Capable of Enantiomeric L-Lactic Acid Production via Consolidated Bioprocessing

Lactic acid and biomethane production from bread waste: a techno-economic and profitability analysis using pinch technology

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