Development of a membrane bioreactor for enzymatic hydrolysis of cellulose

Al‐Zuhair, Sulaiman; Al-Hosany, Mohamed; Zooba, Yasser; Al-Hammadi, Abdulla; Al-Kaabi, Salem

doi:10.1016/j.renene.2012.09.044

Cited by 35 publications

(23 citation statements)

References 11 publications

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“…On the contrary, expensive concentrated acid hydrolysis process leads to environmental and corrosion problems. Alternatively, as enzymatic hydrolysis is carried out at mild environmental conditions with regard to pH and temperature and involves low energy requirement, the utility cost of the process is considered much lower than acid hydrolysis (Al-Zuhair et al 2013). However, the obstacles that have been observed in enzymatic hydrolysis lack an ideal reactor system, slow reaction rate, ineffective use of cellulase, and enzyme inhibition by cellobiose and glucose (Noble et al 1990).…”

Section: Hydrolysis Methodsmentioning

confidence: 99%

“…In the last three decades, lignocellulosic substrates that are comparatively abundant in nature have been mainly used for the production of second-generation biofuel (Al-Zuhair et al 2013). It is even more preferred and advantageous than microalgae-based biofuel production as such third-generation biofuel is comparatively less stable, production will not continue for a long time, and extraction of such fuel is comparatively difficult and costly (Biofuels-Third Generation Biofuels, 2010).…”

Section: Existing Processes Of Ligno Cellulosic Bioethanol Productionmentioning

confidence: 99%

“…The alternative solution of such problem will be to recycle and reuse the enzymes. The retention of enzymes in free form rather than immobilized form is implemented more (Ishola et al 2013(Ishola et al , 2015a, as the immobilized form restricts its ability to penetrate the solid substrate; hence, expected conversion efficiency will be comparatively less (Al-Zuhair et al 2013). Similarly, batch mode of enzymatic hydrolysis process for cellulose conversion is often restricted by product inhibition problem caused by newly generated hexose and pentose sugars (Andrić et al 2010).…”

Section: Membranebased Advanced Enzymatic Saccharificationmentioning

confidence: 99%

“…Fermentative production of bio-ethanol using same nanofilteration membrane integrated bioreactor system in the second half of the continuous process with cell recycling and instant separation of bio-ethanol Brought to you by | Loughborough University Authenticated Download Date | 11/27/18 2:53 PM saccharification in the first stage with efficient separation and recirculation of enzymes. The retention of enzymes in free form rather than immobilized form is implemented more (Ishola et al 2013(Ishola et al , 2015a, as the immobilized form restricts its ability to penetrate the solid substrate; hence, expected conversion efficiency will be comparatively less (Al-Zuhair et al 2013). In the next stage of our identified membrane-integrated process, NF-based cell recycle high cell density fermentation system was proposed with prior increase of sugar concentration in bioreactor.…”

Section: Inoculation Of Suitable Fermentative Microorganismmentioning

confidence: 99%

“…The National Renewable Energy Laboratory (NREL; Golden, CO, USA) suggested that the ethanol production cost of 20 cents per liter can be possible in another 15 years from lignocellulosic biomass employing designer cellulases. Few research investigations have been carried out based on membrane-based lignocellulosic bioethanol production (Han and Cheryan 1995, Gan et al 2002, Andrić et al 2010, Cheng et al 2010, Al-Zuhair et al 2013, Ishola et al 2013, Ylitervo et al 2013, Mahboubi et al 2016 in the international level. Wei et al (2014) presented a clear view regarding how membranebased processes can be involved in different stages of lignocellulosic bioethanol production.…”

Section: Status Of Lignocellulosic Bio Ethanol Production In the Intementioning

confidence: 99%

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Lignocellulosic bioethanol production: prospects of emerging membrane technologies to improve the process – a critical review

Dey

Pal

Kevin

et al. 2018

Reviews in Chemical Engineering

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AbstractTo meet the worldwide rapid growth of industrialization and population, the demand for the production of bioethanol as an alternative green biofuel is gaining significant prominence. The bioethanol production process is still considered one of the largest energy-consuming processes and is challenging due to the limited effectiveness of conventional pretreatment processes, saccharification processes, and extreme use of electricity in common fermentation and purification processes. Thus, it became necessary to improve the bioethanol production process through reduced energy requirements. Membrane-based separation technologies have already gained attention due to their reduced energy requirements, investment in lower labor costs, lower space requirements, and wide flexibility in operations. For the selective conversion of biomasses to bioethanol, membrane bioreactors are specifically well suited. Advanced membrane-integrated processes can effectively contribute to different stages of bioethanol production processes, including enzymatic saccharification, concentrating feed solutions for fermentation, improving pretreatment processes, and finally purification processes. Advanced membrane-integrated simultaneous saccharification, filtration, and fermentation strategies consisting of ultrafiltration-based enzyme recycle system with nanofiltration-based high-density cell recycle fermentation system or the combination of high-density cell recycle fermentation system with membrane pervaporation or distillation can definitely contribute to the development of the most efficient and economically sustainable second-generation bioethanol production process.

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Section: Hydrolysis Methodsmentioning

confidence: 99%

Section: Existing Processes Of Ligno Cellulosic Bioethanol Productionmentioning

confidence: 99%

Section: Membranebased Advanced Enzymatic Saccharificationmentioning

confidence: 99%

Section: Inoculation Of Suitable Fermentative Microorganismmentioning

confidence: 99%

Section: Status Of Lignocellulosic Bio Ethanol Production In the Intementioning

confidence: 99%

See 3 more Smart Citations

Lignocellulosic bioethanol production: prospects of emerging membrane technologies to improve the process – a critical review

Dey

Pal

Kevin

et al. 2018

Reviews in Chemical Engineering

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Hydrodynamic studies of innovative membrane reactor for enzymatic hydrolysis of lignocellulosic waste

Dąbkowska‐Susfał,

Lipińska,

Sobieszuk

et al. 2024

Biotechnology Journal

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This paper presents the study concerning the impact of the basic operational parameters on the performance of an innovative microfiltration membrane reactor applied for enzymatic hydrolysis of lignocellulosic biomass. The concept and basic hydrodynamics of the reactor with tubular ceramic membranes and a propeller agitator were shown. Besides, the efficiency of enzymatic hydrolysis of corn straw was studied to check reactor functionality. It has been proven that the proposed reactor construction can improve the microfiltration of lignocellulosic suspension by reducing the cake layer on the membrane surface. Increasing the rotational speed of the propeller agitator also improved the filtration efficiency. The permeate flux during the microfiltration experiments was lower for smaller lignocellulose biomass fraction (D < 425 μm) when compared to the less fragmented corn straw (425 < D < 900 μm). For larger solid fractions, a stirring speed increase enhanced the separation efficiency regardless of the differences in biomass concentration. In contrast, this trend for the finer biomass fraction was only noticeable for the highest used biomass concentration (C = 2.0%). Considering the enzymatic hydrolysis of corn straw, membrane separation of reaction products positively influenced the process yield, and the results depended on the applied operational parameters.

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