Reactors for High Solid Loading Pretreatment of Lignocellulosic Biomass

Zhang, Jian; Hou, Weiliang; Bao, Jie

doi:10.1007/10_2015_307

Cited by 14 publications

(10 citation statements)

References 79 publications

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“…This is in compliance with recent studies, e.g. Zhang et al [29,30] showing that solution containing up to 5 wt.% of glycerol had no negative effect on yeast fermentation. Insignificant glycerol concentrations were also noticed in current studies (< 1 g•dm -3 ) (data not shown), most probably as a by-product of ethanol fermentation by yeasts [31].…”

Section: Ethanol Production From Enriched In Cellulose Biomasssupporting

confidence: 93%

Integrated Production of Biofuels and Succinic Acid from Biomass after Thermochemical Pretreatments

Kuglarz

Grűbel

2018

Ecological Chemistry and Engineering S

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The aim of this study was to develop an effective thermochemical method for treatment of industrial hemp, in order to increase its bioconversion to biofuels and bio-products. Industrial hemp was subjected to various thermochemical pretreatments using: alkaline (3 % NaOH), oxidative (3 % H2O2 at pH 11.5) and glycerol-based methods (70-90 % of glycerol, 1-3 % NaOH), prior to enzymatic hydrolysis with Cellic® CTec2/Cellic® HTec2 (15 FPU∙g−1 glucan). Innovative pretreatment with glycerol fraction (80 % glycerol content, 2 % NaOH, 12.5 % biomass loading) showed to be superior over commonly used alkaline and oxidative methods with respect to by-products generation and sugar losses. Integrated process of ethanol production from enriched cellulose fraction (172 kg EtOH∙Mg−1 of dry hemp) and succinic production from xylose-rich residue after ethanol fermentation (59 kg∙Mg−1 of dry hemp) allowed to convert about 97 % of sugars released (glucose and xylose) during enzymatic hydrolysis of pre-treated biomass. The present study showed that it is possible to replace 50 % of the costly yeast extract, used during succinic fermentation as nitrogen source, by alternative nitrogen source (rapeseed cakes) without significant deterioration of succinic yield. Pretreatment liquor after lignin precipitation (52 kg∙Mg−1 of biomass treated) exhibited a high biodegradability (92 %) and allowed to produce 420 m3 CH4/Mg VS). Results obtained in this study clearly document the possibility of biofuels (bioethanol, biogas) and bio-chemicals production from industrial hemp, in a biorefinery approach.

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Section: Ethanol Production From Enriched In Cellulose Biomasssupporting

confidence: 93%

Integrated Production of Biofuels and Succinic Acid from Biomass after Thermochemical Pretreatments

Kuglarz

Grűbel

2018

Ecological Chemistry and Engineering S

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“…However, the extent of process limitation is dependent on the various factors including the characteristics of biomass, the reactor configuration as well as operational conditions used. In this context, the evaluation of the different configurations of mechanically stirred reactors concomitant to the use of the fed-batch mode has been pointed out as an attractive strategy to overcome the rheological problems observed in SSF process at high biomass loadings [12,[33][34][35].…”

Section: Effect Of Solid Loading In Batch Ssfmentioning

confidence: 99%

Ethanol Production from High Solid Loading of Rice Straw by Simultaneous Saccharification and Fermentation in a Non-Conventional Reactor

et al. 2020

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Simultaneous saccharification and fermentation (SSF) at high solid loading is a potential approach to improve the economic feasibility of cellulosic ethanol. In this study, SSF using high loading of rice straw was assessed using a vertical ball mill reactor. First, the conditions of temperature and number of glass spheres were optimized at 8% (w/v) initial solids (41.5 °C, 18 spheres). Then, assays were carried out at higher solid loadings (16% and 24% w/v). At 8% or 16% solids, the fermentation efficiency was similar (ηF~75%), but the ethanol volumetric productivity (QP) reduced from 1.50 to 1.14 g/L.h. By increasing the solids to 24%, the process was strongly affected (ηF = 40% and QP = 0.7 g/L.h). To overcome this drawback, three different feeding profiles of 24% pre-treated rice straw were investigated. Gradual feeding of the substrate (initial load of 16% with additions of 4% at 10 and 24 h) and an inoculum level of 3 g/L resulted in a high ethanol titer (52.3 g/L) with QP of 1.1 g/L.h and ηF of 67%. These findings demonstrated that using a suitable fed-batch feeding strategy helps to overcome the limitations of SSF in batch mode caused by the use of high solid content.

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“…The lower SL (10% SL) at 200C and 60 minutes gave higher glucose recovery. To overcome this, a specific reactor is needed [30].…”

Section: Solid Loading (Sl) Effectsmentioning

confidence: 99%

Temperature, Solid Loading and Time Effects on Recovery of Sugar from OPEFB

2018

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Abstract. Biorefinery industry used lignocellulosic biomass as the raw material. Oil Palm Empty Fruit Bunch (OPEFB) is one of Indonesian potential lignocellulosic biomass, which consists of hemicellulose with xylan as the main component. Xylitol production via fermentation could use this xylan since it can be converted into xylose. However, the structure of OPEFB is such that hemicellulose is protected in a way that will hinder hydrolysis enzyme to access it. Considering that hemicellulose is more susceptible to heat than cellulose, a hydrothermal process was applied to pre-treat OPEFB before it was hydrolyzed enzymatically. The aim of the research is to map the effect of temperature, solid loading and time of pre-treatment process to obtain and recover as much as possible accessible hemicellulose from OPEFB. The results showed that temperature gave more significant effect than time and solid loading for glucose recovery of OPEFB residues. While xylose recovery varies greatly with temperature, but solid loading and time gave less significant effect.

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Reactors for High Solid Loading Pretreatment of Lignocellulosic Biomass

Cited by 14 publications

References 79 publications

Integrated Production of Biofuels and Succinic Acid from Biomass after Thermochemical Pretreatments

Integrated Production of Biofuels and Succinic Acid from Biomass after Thermochemical Pretreatments

Ethanol Production from High Solid Loading of Rice Straw by Simultaneous Saccharification and Fermentation in a Non-Conventional Reactor

Temperature, Solid Loading and Time Effects on Recovery of Sugar from OPEFB

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