Microwave-assisted Alkali Pre-treatment of Wheat Straw and its Enzymatic Hydrolysis

Zhu, Shengli; Wu, Yuanxin; Zhou, Yu; Chen, Qiming; Wu, Guiying; Yu, Fang; Wang, Cunwen; Jin, Shiwei

doi:10.1016/j.biosystemseng.2006.04.002

Cited by 124 publications

(76 citation statements)

References 17 publications

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“…2). This observation supports the finding of [26] who reported that, during alkali pretreatment of wheat straw, with microwave assisted heating, lower sugars losses and higher hydrolysis rates were observed than that of conventional alkaline pretreatment alone.…”

Section: Graphical Representation Of Microwave Assisted Ammonium Hydrsupporting

confidence: 92%

Microwave-Alkaline Assisted Pretreatment of Banana Trunk for Bioethanol Production

Chidi¹,

Oluwatisin²,

Deborah³

2015

JEPE

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Pretreatment is one of the most important steps in the production bioethanol from lignocellulose materials. Alkaline pretreatment is a common mean of pretreatment but microwave oven could assist its efficiency as it can reduce the pretreatment time and improve the enzymatic activity during hydrolysis. The aim of this paper is to determine lignin removal from banana trunk using microwave-assisted alkaline (NaOH and NH 4 OH) pretreatments. The best pretreatment conditions were used for mass pretreatment before hydrolysis and fermentation. The result shows that, optimum lignin removal was with microwave-assisted NaOH pretreatment with the removal of up to 98% lignin at 2% (w/v (weight/volum)) sodium hydroxide, 170 W microwave power at 10 min. Microwave-assisted ammonium hydroxide pretreatment achieved 97% lignin removal at 1% ammonium hydroxide concentration and 680 W microwave power at 5 min. Microwave-alkaline assisted pretreatment increased the yield and quality of fermentable sugar after enzyme hydrolysis with NH 4 OH and ammonium hydroxide yielding 40% and 39% of ethanol, respectively. This result reveals that, well controlled microwave-alkaline assisted pretreatment of banana trunk could effectively remove lignin and give high bioethanol yield.

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Section: Graphical Representation Of Microwave Assisted Ammonium Hydrsupporting

confidence: 92%

Microwave-Alkaline Assisted Pretreatment of Banana Trunk for Bioethanol Production

Chidi¹,

Oluwatisin²,

Deborah³

2015

JEPE

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“…The pretreatments can be classified into physical [17] or physicochemical [18], chemical [19], and biological [20] methods or combinations thereof [21][22][23]. The effectiveness of each type of pretreatment is presented in Table 2 [24][25][26][27].…”

Section: Pretreatment Of Biomassmentioning

confidence: 99%

“…Microwave-assisted alkali pretreatment has also been reported to be a potential alternative to wheat straw pretreatment for enzymatic hydrolysis [22]. In the aforementioned study, the wheat straw exhibited a weight loss of 48.4% and a composition of cellulose 79.6%, lignin 5.7%, and hemicellulose 7.8% after 25 min microwave-assisted alkali pretreatment at 700 W, compared with a weight loss of 44.7% and a composition of cellulose 73.5%, lignin 7.2%, and hemicellulose 11.2% after 60 min conventional alkali pretreatment.…”

Section: Microwave-assisted Chemical Pretreatmentmentioning

confidence: 99%

Microwave-assisted pretreatment technologies for the conversion of lignocellulosic biomass to sugars and ethanol: a review

Puligundla

Oh²,

Mok³

2016

Carbon letters

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Lignocellulosic biomass conversion to biofuels such as ethanol and other value-added bio-products including activated carbons has attracted much attention. The development of an efficient, cost-effective, and eco-friendly pretreatment process is a major challenge in lignocellulosic biomass to biofuel conversion. Although several modern pretreatment technologies have been introduced, few promising technologies have been reported. Microwave irradiation or microwave-assisted methods (physical and chemical) for pretreatment (disintegration) of biomass have been gaining popularity over the last few years owing to their high heating efficiency, lower energy requirements, and easy operation. Acid and alkali pretreatments assisted by microwave heating meanwhile have been widely used for different types of lignocellulosic biomass conversion. Additional advantages of microwave-based pretreatments include faster treatment time, selective processing, instantaneous control, and acceleration of the reaction rate. The present review provides insights into the current research and advantages of using microwave-assisted pretreatment technologies for the conversion of lignocellulosic biomass to fermentable sugars in the process of cellulosic ethanol production.

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“…Microwaves interact with both polar molecules and ions in LCBs and produce thermal and non-thermal effects, which help breakdown the biomass in a shorter time compared to conventional heating [19,20]. Microwave (MW)-assisted alkali pretreatment has been attempted by many researchers as an effective tool to delignify the biomass [21,22]. Hydrogen peroxide has been reported as an activator of MW irradiation as it degrades easily to water and oxygen [23].…”

Section: Introductionmentioning

confidence: 99%

Microwave-Assisted Alkali Delignification Coupled with Non-Ionic Surfactant Effect on the Fermentable Sugar Yield from Agricultural Residues of Cassava

Pooja¹,

Padmaja²

2017

IJEAB

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Microwave-assisted Alkali Pre-treatment of Wheat Straw and its Enzymatic Hydrolysis

Cited by 124 publications

References 17 publications

Microwave-Alkaline Assisted Pretreatment of Banana Trunk for Bioethanol Production

Microwave-Alkaline Assisted Pretreatment of Banana Trunk for Bioethanol Production

Microwave-assisted pretreatment technologies for the conversion of lignocellulosic biomass to sugars and ethanol: a review

Microwave-Assisted Alkali Delignification Coupled with Non-Ionic Surfactant Effect on the Fermentable Sugar Yield from Agricultural Residues of Cassava

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