One-pot synthesis of lactic acid from cellulose over a sulfonated Sn-KIT6 catalyst

Cai, Wei; Chen, Qing; Xuan, Hao; Li, Congming; Yu, Hao; Cui, Li; Yu, Zhihui; Zhang, Shaoyin; Qu, Fengli

doi:10.1007/s11814-019-0236-8

Cited by 11 publications

(3 citation statements)

References 55 publications

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“…Lactic acid is a resource for the production of polylactic acid (PLA), a commercial biodegradable plastic [9]. PLA has emerged as a green alternative to petroleum-based plastics because of its properties, such as its biodegradability, biocompatibility, transparency and processability [10].…”

Section: Introductionmentioning

confidence: 99%

Statistical Optimization of Alkali Pretreatment to Improve Sugars Recovery from Spent Coffee Grounds and Utilization in Lactic Acid Fermentation

et al. 2021

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Biorefinery, which utilizes carbon-neutral biomass as a resource, is attracting attention as a significant alternative in a modern society confronted with climate change. In this study, spent coffee grounds (SCGs) were used as the feedstock for lactic acid fermentation. In order to improve sugar conversion, alkali pretreatment was optimized by a statistical method, namely response surface methodology (RSM). The optimum conditions for the alkali pretreatment of SCGs were determined as follows: 75°C, 3% potassium hydroxide (KOH) and a time of 2.8 h. The optimum conditions for enzymatic hydrolysis of pretreated SCGs were determined as follows: enzyme complex loading of 30-unit cellulase, 15-unit cellobiase and 50-unit mannanase per g biomass and a reaction time of 96 h. SCG hydrolysates were used as the carbon source for Lactobacillus cultivation, and the conversions of lactic acid by L. brevis ATCC 8287 and L. parabuchneri ATCC 49374 were 40.1% and 55.8%, respectively. Finally, the maximum lactic acid production by L. parabuchneri ATCC 49374 was estimated to be 101.2 g based on 1000 g of SCGs through the optimization of alkali pretreatment and enzymatic hydrolysis.

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Section: Introductionmentioning

confidence: 99%

Statistical Optimization of Alkali Pretreatment to Improve Sugars Recovery from Spent Coffee Grounds and Utilization in Lactic Acid Fermentation

et al. 2021

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“…In recent years, catalysts and reagents containing -SO 3 H have received considerable attention and use in organic synthesis. [1][2][3][4] Examples include mesoporous-amorphous silica, 5 mesoporousamorphous carbon 6 and magnetic nanoparticles, 7 etc. This is because they have unique properties, such as wide universality, cheap and easy to obtain raw materials, simple post-processing, and they are eco-friendly.…”

Section: Introductionmentioning

confidence: 99%

High acidity cellulose sulfuric acid from sulfur trioxide: a highly efficient catalyst for the one step synthesis of xanthene and dihydroquinazolinone derivatives

Yue

Wang

et al. 2019

RSC Adv.

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“…Recently, LA is applied as the precursor for various biodegradable polymers or building-block for eco-friendly solvents [2]. Also, LA is a resource for polylactic acid (PLA) production, a biodegradable plastic used commercially [3]. PLA has emerged as a green alternative to petroleum-based plastics because of its properties, such as biodegradability, biocompatibility, transparency, and processability [4].…”

Section: Introductionmentioning

confidence: 99%

Statistical optimization of the fermentation factors for increased biorefinery of corn-steep water effluent to lactic acid by Enterococcus faecium strain WH51-1

Selim

Fouda

Salem

et al. 2022

Biomass Conv. Bioref.

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Organic waste bioprocessing for production of useful products are increasing due to fossil fuel depletion, problems with waste management, and the requirement for biodegradable plastics. Lactic acid (LA) is important in foods, polymer beverages, cosmetics, and medicine applications. However, the main challenge in the large-scale processing of LA is the enhanced production and productivity using low-cost resources. In this study, Enterococcus faecium WH51-1, a newly obtained thermo-alkali tolerant LA bacterium, was used for LA production from corn-steep water (CSW) as raw material. The optimal culture conditions and medium components were established. Different concentrations of yeast extract (YE) and pH values were investigated with highest LA production of 48.2 ± 2.7 g/L at a yield of 0.89 ± 0.04 g/g-consumed sugars and a productivity of 0.50 ± 0.03 g/L.h at pH 8.5 without YE supplementation. A central composite design (CCD) was utilized to determine the high LA concentrations at optimal values for the process variables (sugar concentrations, temperature, inocula sizes, pH value, and YE concentration). The model was realized with an acceptable fit. The optimization of the factors was carried out by normal probability plots, interaction-plots, incorporating effect plots, analysis of variance (ANOVA), surface plots, Pareto charts, and contour plots. All the parameters were influenced at a 5% significance level. Additionally, some of the possible interactions between these parameters also influenced the production process. A regression model was suggested and fitted the experimental data very well. The results of this work investigated that LA synthesized of the optimized-fermentation conditions was 10% greater than classical optimization methods. This study presented a green “free nutrient” and cost-effective utilization of corn steep effluent as a cheap alternative substrate for biorefinery to lactic acid. Graphical Abstract

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One-pot synthesis of lactic acid from cellulose over a sulfonated Sn-KIT6 catalyst

Cited by 11 publications

References 55 publications

Statistical Optimization of Alkali Pretreatment to Improve Sugars Recovery from Spent Coffee Grounds and Utilization in Lactic Acid Fermentation

Statistical Optimization of Alkali Pretreatment to Improve Sugars Recovery from Spent Coffee Grounds and Utilization in Lactic Acid Fermentation

High acidity cellulose sulfuric acid from sulfur trioxide: a highly efficient catalyst for the one step synthesis of xanthene and dihydroquinazolinone derivatives

Statistical optimization of the fermentation factors for increased biorefinery of corn-steep water effluent to lactic acid by Enterococcus faecium strain WH51-1

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