High efficiency bioethanol production from barley straw using a continuous pretreatment reactor

Han, Minhee; Kang, Kyoung Ho; Kim, Yule; Choi, Gi-Wook

doi:10.1016/j.procbio.2013.01.007

Cited by 69 publications

(37 citation statements)

References 12 publications

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“…In this case not only biomass yield is important but also chemical composition of herbage biomass which can improve or limit its suitability for combustion process (Han et al, 2013;Vassilev et al, 2013). Fuel quality is determined by the physical and chemical properties and influences the entire process of thermal utilization.…”

Section: Introductionmentioning

confidence: 99%

Biomass yield and fibre components in reed canary grass and tall fescue grown as feedstock for combustion

Pocienė

Kadžiulienė

2016

Zemdirbyste-Agriculture

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Grass biomass is a potential feedstock for solid biofuel production. This paper presents the results of experiments conducted on Endocalcari-Epihypogleyic Cambisol (CMg-p-w-can) to evaluate the biomass yield, quality and bioenergy potential of tall fescue (Festuca arundinacea Schreb.) and reed canary grass (Phalaris arundinacea L.). Two kinds of fertilizers mineral nitrogen (90 kg ha -1 ) and biogas waste (digestate) with the same amount of nitrogen and one-cut regime either in July or in October were chosen to estimate the biomass productivity and energy potential. The results of a two-year experiment suggest that the biomass yield and energy potential depended on the grass species and cultivation technology. Higher biomass and energy yields were produced by reed canary grass when harvested in July, while by tall fescue when harvested in October. Both grass species were most productive when fertilized with mineral nitrogen. Of the two grass species and harvesting dates tested, the highest biomass and energy yields were produced by reed canary grass swards harvested in July. It was proved that the highest content of lignin in the biomass led to the highest energy yield of swards.

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Section: Introductionmentioning

confidence: 99%

Biomass yield and fibre components in reed canary grass and tall fescue grown as feedstock for combustion

Pocienė

Kadžiulienė

2016

Zemdirbyste-Agriculture

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“…It is because high solid loadings may result in limited cellulose conversions in enzymatic hydrolysis [17] or in SSF stages, owing to mass transfer limitation. The efficiency of enzymatic digestibility and fermentation is significantly reduced at high concentrations of pretreated biomass, as mixing becomes difficult with increased viscosity [29]. Therefore, the next step substrate will be loaded gradually in order to obtain high-concentration substrate with a stable viscosity.…”

Section: Effect Of Variation Of Substrate Concentration Loading Direcmentioning

confidence: 99%

The Effect of Substrate Loading On Simultaneous Saccharification And Fermentation Process For Bioethanol Production from Oil Palm Empty Fruit Bunches

et al. 2015

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Increasing energy demand and concern about increased greenhouse gas emissions make lignocellulosic biomass increasingly to be recognized as having great potential for biofuel and biomaterial production based on the biorefinery concept. Oil Palm Empty Fruit Bunches (EFBs) is one of the major solid wastes in the palm oil industries as a source of lignocellulosic biomass. Cellulose is the highest component of EFBs that can be converted to ethanol. The aim of this research was to investigate the different strategies for high substrate loading on SSF process of bioethanol production from EFBs. Increasing substrate loading is one of the most important challenges to make bioethanol production more economical. This research used two methods to increase the substrate concentration loading on Simultaneous Saccharification and Fermentation (SSF) i.e: direct variation of substrate concentration loading and substrate loading gradually to obtain a high-concentration substrate. A range of substrate loading was from 15% to 25% (g.mL -1 ). The SSF process was carried out at 32 o C, pH 4.8, and 150 rpm for 72 hours. The result shows that the highest concentration of ethanol can be produced by a high concentration of substrate loading gradually. The highest ethanol concentration was 83.40 g.L -1 (80.21% ethanol yield) by using 25% (g.mL -1 )substrate loading gradually, 18 FPU/g substrate enzyme Cellic® Ctec2 and 20% Cellic® Htec2 (based on volume of Cellic® Ctec2), and 1% (g.mL -1 ) yeast Saccharomyces cereviceae in SSF process. Whereas, 20% (g.mL -1 ) concentration substrate loading by directly or gradually produce almost same ethanol concentration.

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“…Such fed-batch schemes have been investigated for saccharification or fermentation with high solids loadings (up to 25%, based on dry weight) (Hodge et al 2009;Wang et al 2012a;Zhang et al 2013). In addition, the concept of increasing solids concentrations in a stepwise manner is a continuous process in which pretreated biomass accumulates gradually in a saccharification or fermentation tank (Schell et al 2003;Han et al 2013). Figure 3 shows the kinetics of partial SSF with 12% and 16% glucancontaining pretreated GU.…”

Section: Partial Ssf With Pretreated Gu At High Solids Loadingsmentioning

confidence: 99%

Partial Simultaneous Saccharification and Fermentation at High Solids Loadings of Alkaline-pretreated Miscanthus for Bioethanol Production

Cha¹,

An²,

Park³

et al. 2014

BioResources

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In this study, alkaline pretreatment at a bench scale (15-L capacity) was performed to obtain a higher solid residue for the SSF (simultaneous saccharification and fermentation) of Miscanthus sacchariflorus "GoedaeUksae 1" (GU) under the following conditions: 1 M NaOH concentration, 150 °C, and 60 min residence time. Compositional analysis and scanning electron microscope analysis revealed the pretreatment to be highly effective for achieving delignification and morphological changes. Spiral impellers were used for the rapid liquefaction of pretreated GU into slurry, and no additional nutrients were added to the fermentation mixture to reduce overall process costs. The SSF was subsequently conducted in a laboratory-scale fermenter (5-L capacity) for 108 to 120 h with 12% and 16% glucan containing pretreated GU. Consequently, 62.8 g/L and 81.1 g/L of ethanol were obtained. Based on these data, the theoretical ethanol yields from 1 kg of GU (dry weight base) were estimated at 164.6 to 171.1 g/L.

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High efficiency bioethanol production from barley straw using a continuous pretreatment reactor

Cited by 69 publications

References 12 publications

Biomass yield and fibre components in reed canary grass and tall fescue grown as feedstock for combustion

Biomass yield and fibre components in reed canary grass and tall fescue grown as feedstock for combustion

The Effect of Substrate Loading On Simultaneous Saccharification And Fermentation Process For Bioethanol Production from Oil Palm Empty Fruit Bunches

Partial Simultaneous Saccharification and Fermentation at High Solids Loadings of Alkaline-pretreated Miscanthus for Bioethanol Production

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