Integrating enzymatic hydrolysis into subcritical water pretreatment optimization for bioethanol production from wheat straw

Chen, Jiaxin; Wang, Xin; Zhang, Biying; Yang, Yifan; Song, Yangbo; Zhang, Fan; Liu, Bianfang; Zhou, Yuan; Yi, Yanglei; Shan, Yuanyuan; Lü, Xin

doi:10.1016/j.scitotenv.2021.145321

Cited by 62 publications

(22 citation statements)

References 62 publications

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“…BMP01 hydrolysis of rice straw. The subcritical water pretreatment and high solid hydrolysis were used to improve the conversion efficiency of bioethanol from wheat straw (Chen et al, 2021), as shown in Figure 1. It carried out the yields of hydrolysis of 77.85-89.59% and fermentation of 93.34-96.18%.…”

Section: The Applications Of Hemicelluloses From Wheat Straw the Xylitol And Biofuel Production Of Hemicellulosementioning

confidence: 99%

“…Authors suggested the films with enhanced modulus, elongation, water resistance, and barrier to water vapor for wrapping or coating a variety of foods. In the work by Ma et al (2018), the potential of an acid hydro-tropic process was evaluated at low temperatures for on-farm valorization FIGURE 1 | Different variations of lignin and cellulose content between subcritical water pretreatment and other pretreatments (Chen et al, 2021).…”

Section: The Application Of Hemicellulose-materials In Packaging Fieldmentioning

confidence: 99%

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Recent Developments and Applications of Hemicellulose From Wheat Straw: A Review

Huang

et al. 2021

Front. Bioeng. Biotechnol.

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Hemicellulose is an important component of plant cell walls, which is mainly used in biofuels and bioproducts. The hemicellulose extracted from different plant sources and plant locations has different microstructure and molecule. Wheat straw is an important biomass raw material for the extraction of hemicellulose. The aims of this review are to summary the recent developments and various applications of hemicellulose from wheat straw. The microstructure and molecule of hemicellulose extracted by different methods are comparably discussed. The hemicellulose-based derivatives and composites are also reviewed. Special attention was paid to the applications of hemicellulose such as biofuel production, packaging field, and adsorbent. The problems and developing direction were given based on our knowledge. We expect that this review will put forward to the development and high-value applications of hemicellulose from wheat straw.

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Section: The Applications Of Hemicelluloses From Wheat Straw the Xylitol And Biofuel Production Of Hemicellulosementioning

confidence: 99%

Section: The Application Of Hemicellulose-materials In Packaging Fieldmentioning

confidence: 99%

Recent Developments and Applications of Hemicellulose From Wheat Straw: A Review

Huang

et al. 2021

Front. Bioeng. Biotechnol.

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“…36 An additional and positive feature of SCWP is the cheap maintenance cost of the process since conventional pretreatments present high maintenance costs associated with the corrosiveness of reagents to the equipment, which influences the economic feasibility of industrial applications. 47 For instance, the process profitability of dilute acid pretreatment is mainly affected by capital costs associated with the investment and input chemicals. 48 Finally, intensifying SCWP as a driving-change technology can be a promising alternative for sugarcane biorefineries, advocating a more sustainable and circular industry for bioenergy recovery from by-products.…”

Section: Concluding Remarks and Perspectivesmentioning

confidence: 99%

Cost analysis of subcritical water pretreatment of sugarcane straw and bagasse for second‐generation bioethanol production: a case study in a sugarcane mill

Lachos‐Perez¹,

Buller

Zabot

et al. 2021

Biofuels Bioprod Bioref

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The value of lignocellulose residues for green technologies has been growing, but biomass pretreatment is still an economic challenge. In this case study, a cost analysis of subcritical water pretreatment (SCWP) of sugarcane by-products for ethanol production was conducted. The proposed industrial scheme is attached to a Brazilian sugarcane mill, which generates a surplus of bagasse. Seven scenarios were simulated to address the prospects of the implementation of the process in the mill. The fermentation of sugarcane bagasse hydrolysate with Scheffersomyces stipitis upgraded the ethanol yield. The fixed capital investment of the industrial process was approximately US$27 million and 35% of this was associated with the SCWP. The highest ethanol yield was obtained for the process operated with hydrolysate from sugarcane bagasse (6740.5 kg ethanol day −1 ), which is associated with the high hemicellulose content in the bagasse composition compared with straw. The cost difference revealed that the fixed capital investment and utilities were the largest expenses for process implementation and operation. The simulated process reached 5.45 US$ L −1 as the lowest cost of manufacturing. However, this cost is approximately 10-fold higher than the market price for ethanol in Brazil. In conclusion, the SCWP of sugarcane straw and bagasse demands significant technical improvement before scaling up to the industrial scale for bioethanol production.

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“…The use of subcritical water (subW) as an eco-friendly method for lignocellulose pretreatment avoiding chemicals addition was proposed in recent studies [ 8 , 9 , 10 , 11 ]. SubW is pressurized water in its liquid state in the temperature range from 100 °C to 374 °C.…”

Section: Introductionmentioning

confidence: 99%

Subcritical Water as Pretreatment Technique for Bioethanol Production from Brewer’s Spent Grain within a Biorefinery Concept

et al. 2022

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Bioeconomy and environmental issues envisage industrial by-products such as Brewer’s spent grain (BSG) as renewable resources for their recycling and reuse within a biorefinery concept. This study aimed to investigate the production of bioethanol from subcritical water (subW) pretreated BSG, following the conversion of the BSG biopolymers cellulose and hemicelluloses. The subW pretreatment was performed in a batch reactor at 174 °C, during 60 min and 5% (w/v) of dry BSG charge. The behavior of BSG biopolymers under subW pretreatment was monitored by evaluating the chemical composition of the liquid and solid streams and the chemical and structural changes caused in the solid residues by scanning electron microscope (SEM), CHNS elemental analysis and water retention value (WRV). The production of bioethanol from subW-pretreated BSG was assessed by separate hydrolysis and fermentation (SHF) and also by simultaneous saccharification and fermentation (SSF) by using the enzymatic cocktail Celluclast 1.5 L (40 FPU/gsolids) and the yeast Ethanol Red®. The higher bioethanol productivity (1.073 g∙L−1∙h−1) and concentration (32.18 g/L) were achieved by SSF with higher solids’ loading (25%) and following a fed-batch strategy. These results suggest that subcritical water pretreatment is a promising technology for the valorization of BSG as a feedstock for second-generation bioethanol production.

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Integrating enzymatic hydrolysis into subcritical water pretreatment optimization for bioethanol production from wheat straw

Cited by 62 publications

References 62 publications

Recent Developments and Applications of Hemicellulose From Wheat Straw: A Review

Recent Developments and Applications of Hemicellulose From Wheat Straw: A Review

Cost analysis of subcritical water pretreatment of sugarcane straw and bagasse for second‐generation bioethanol production: a case study in a sugarcane mill

Subcritical Water as Pretreatment Technique for Bioethanol Production from Brewer’s Spent Grain within a Biorefinery Concept

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