Optimization of dilute sulfuric acid, aqueous ammonia, and steam explosion as the pretreatments steps for distillers’ dried grains with solubles as a potential fermentation feedstock

Iram, Attia; Çekmecelioğlu, Deniz; Demirci, Ali

doi:10.1016/j.biortech.2019.03.009

Cited by 44 publications

(25 citation statements)

References 28 publications

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“…Other important fermentation inhibitors are formic acid, acetic acid, levulinic acid, and phenolic compounds [25]. Additional pretreatments are under study such as mild alkaline [26], oxidative [27], aqueous ammonia and steam explosion [28], as well as some combined techniques [24,29].…”

Section: Introductionmentioning

confidence: 99%

Brachiaria brizantha Grass as a Feedstock for Ethanol Production

Rodrigues

Almeida

Maitan-Alfenas

et al. 2021

Braz. arch. biol. technol.

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Different lignocellulosic biomasses are found worldwide and each country has its own important industrial crop that can be converted into high-value products, such as ethanol. Therefore, evaluation of new biomasses to be used in biorefineries is important to decrease the dependence on non-renewable resources and to guarantee sustainable development. This work evaluated Brachiaria brizantha, a grass commonly used as animal forage, and the standard biomass for 2G-ethanol, sugarcane bagasse. The chemical compositions of both biomasses were determined and different times and temperature of acid pretreatment were tested. Morphological analysis via scanning electron microscopy showed more deconstructed fibers after harsher biomass pretreatments. Simultaneous saccharification and fermentation of pretreated Brachiaria brizantha presented higher efficiency than when using sugarcane bagasse as the carbon source. A biomass conversion of 46 % was achieved when Brachiaria brizantha grass was pretreated with 2% sulfuric acid for 60 minutes. Moreover, fermentation was not impaired by the inhibitors furfural and hydroxymethylfurfural. It was concluded that Brachiaria brizantha is a promising biomass for ethanol production.

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Section: Introductionmentioning

confidence: 99%

Brachiaria brizantha Grass as a Feedstock for Ethanol Production

Rodrigues

Almeida

Maitan-Alfenas

et al. 2021

Braz. arch. biol. technol.

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“…When further pretreated by IL after SE, the concentration of total sugars increased to 64.49 g/L (0.46 g/g of sample) with a growth rate of 26.97% compared with the control. The maximum sugar yield was higher than that from distillers' dried grains with solubles (0.38 g/g) [34].…”

Section: Effect Of Se Pretreatment On the Release Of Soluble Componentsmentioning

confidence: 67%

“…Then, they were dried at 65 °C for 10-12h to constant weight, weighed, and used to calculate the content of total soluble solids. Analysis of glucose, arabinose, and cellobiose was conducted by high-performance liquid chromatography (HPLC) following a previously reported method [34].…”

Section: Composition Analysis Of Mycelium Waste After Pretreatmentmentioning

confidence: 99%

Comprehensive utilization of Aspergillus niger mycelium waste from citric acid fermentation on the basis of steam explosion and ionic liquid pretreatment

Ma¹,

Gao²,

Bi³

et al. 2019

Preprint

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Background Aspergillus niger mycelium waste, a by-product from citric acid fermentation is considered a good raw material to produce fungal chitosan and glucosamine (GlcN). However, its successful application has always been a challenge.Results In this work, the effects of combined pretreatment involving steam explosion and ionic liquid (IL) on mycelium waste were investigated. Results show that pretreatment of mycelium waste at 2.5 MPa for 1 min improved the GlcN hydrochloride yield by 65.49%, the release of soluble sugar reached 0.46 g/g of sample, and the deacelation degree of fungal chitosan by hydrolysis of chitin deacetylase from Rhodococcus equi CGMCC14861 (ReCDA) was from scratch and a 1.3-fold increase by combined with IL pretreatment. In addition, a recycling strategy for by-products, which promoted the fermentation of ReCDA used for fungal chitosan, was efficiently developed.Conclusion This is the first report of comprehensive utilization of Aspergillus niger mycelium waste from citric acid fermentation on the basis of steam explosion and ionic liquid pretreatment. This study demonstrates a green-like technology for the comprehensive utilization of A. niger mycelium waste from citric acid fermentation.

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“…For example, in the case of bioethanol production, the main ingredient required for microbial species is glucose or other monosaccharides which are to be converted into ethanol. Acid hydrolysis is one of the chemical methods that can produce higher amounts of simple sugars as compared to other methods [100].…”

Section: Pretreatment Of Feedstock For Lignocellulolytic Enzyme Productionmentioning

confidence: 99%

“…The pretreatment method should not degrade the monosaccharides if they are the final product of the pretreatment. Some methods such as acid hydrolysis can degrade the pentoses and hexoses further into furfurals and Trihalomethanes (THMs), which may have an inhibitory effect on fungal activity [100].…”

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confidence: 99%

Ideal Feedstock and Fermentation Process Improvements for the Production of Lignocellulolytic Enzymes

2020

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The usage of lignocellulosic biomass in energy production for biofuels and other value-added products can extensively decrease the carbon footprint of current and future energy sectors. However, the infrastructure in the processing of lignocellulosic biomass is not well-established as compared to the fossil fuel industry. One of the bottlenecks is the production of the lignocellulolytic enzymes. These enzymes are produced by different fungal and bacterial species for degradation of the lignocellulosic biomass into its reactive fibers, which can then be converted to biofuel. The selection of an ideal feedstock for the lignocellulolytic enzyme production is one of the most studied aspects of lignocellulolytic enzyme production. Similarly, the fermentation enhancement strategies for different fermentation variables and modes are also the focuses of researchers. The implementation of fermentation enhancement strategies such as optimization of culture parameters (pH, temperature, agitation, incubation time, etc.) and the media nutrient amendment can increase the lignocellulolytic enzyme production significantly. Therefore, this review paper summarized these strategies and feedstock characteristics required for hydrolytic enzyme production with a special focus on the characteristics of an ideal feedstock to be utilized for the production of such enzymes on industrial scales.

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Optimization of dilute sulfuric acid, aqueous ammonia, and steam explosion as the pretreatments steps for distillers’ dried grains with solubles as a potential fermentation feedstock

Cited by 44 publications

References 28 publications

Brachiaria brizantha Grass as a Feedstock for Ethanol Production

Brachiaria brizantha Grass as a Feedstock for Ethanol Production

Comprehensive utilization of Aspergillus niger mycelium waste from citric acid fermentation on the basis of steam explosion and ionic liquid pretreatment

Ideal Feedstock and Fermentation Process Improvements for the Production of Lignocellulolytic Enzymes

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