Pilot scale study on steam explosion and mass balance for higher sugar recovery from rice straw

Sharma, Sandeep; Kumar, Ravindra; Gaur, Ruchi; Agrawal, Ruchi; Gupta, Ravi P.; Tuli, Deepak K.; Das, Baisakhi

doi:10.1016/j.biortech.2014.10.112

Cited by 71 publications

(33 citation statements)

References 23 publications

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“…various degradation products (Sharma et al, 2015;Mood et al, 2013;Agbor et al, 2011). Corn stover, corncob, and other agricultural stalks are rich in hemicellulose, which is the second most abundant polysaccharide in nature (Mood et al, 2013;Chen and Liu, 2015).…”

Section: Introductionmentioning

confidence: 98%

Xylose production from corn stover biomass by steam explosion combined with enzymatic digestibility

Liu

Chen

2015

Bioresource Technology

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Section: Introductionmentioning

confidence: 98%

Xylose production from corn stover biomass by steam explosion combined with enzymatic digestibility

Liu

Chen

2015

Bioresource Technology

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“…Lignocellulosic biomass (containing 50–70% fermentable carbohydrates in the form of cellulose and hemicellulose), is an attractive feedstock for the production of cellulosic ethanol, due to its abundant availability, low cost and possible environmental benefits, as it does not compete directly with food crops [2, 3]. However, the conversion of cellulose and hemicellulose to fermentable sugars is a rate-limiting step due to its highly recalcitrant nature [4].…”

Section: Introductionmentioning

confidence: 99%

Cellulosic ethanol production via consolidated bioprocessing by a novel thermophilic anaerobic bacterium isolated from a Himalayan hot spring

Singh

Mathur

Tuli

et al. 2017

Biotechnol Biofuels

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BackgroundCellulose-degrading thermophilic anaerobic bacterium as a suitable host for consolidated bioprocessing (CBP) has been proposed as an economically suited platform for the production of second-generation biofuels. To recognize the overall objective of CBP, fermentation using co-culture of different cellulolytic and sugar-fermenting thermophilic anaerobic bacteria has been widely studied as an approach to achieving improved ethanol production. We assessed monoculture and co-culture fermentation of novel thermophilic anaerobic bacterium for ethanol production from real substrates under controlled conditions.ResultsIn this study, Clostridium sp. DBT-IOC-C19, a cellulose-degrading thermophilic anaerobic bacterium, was isolated from the cellulolytic enrichment cultures obtained from a Himalayan hot spring. Strain DBT-IOC-C19 exhibited a broad substrate spectrum and presented single-step conversion of various cellulosic and hemicellulosic substrates to ethanol, acetate, and lactate with ethanol being the major fermentation product. Additionally, the effect of varying cellulose concentrations on the fermentation performance of the strain was studied, indicating a maximum cellulose utilization ability of 10 g L−1 cellulose. Avicel degradation kinetics of the strain DBT-IOC-C19 displayed 94.6% degradation at 5 g L−1 and 82.74% degradation at 10 g L−1 avicel concentration within 96 h of fermentation. In a comparative study with Clostridium thermocellum DSM 1313, the ethanol and total product concentrations were higher by the newly isolated strain on pretreated rice straw at an equivalent substrate loading. Three different co-culture combinations were used on various substrates that presented two-fold yield improvement than the monoculture during batch fermentation.ConclusionsThis study demonstrated the direct fermentation ability of the novel thermophilic anaerobic bacteria on various cellulosic and hemicellulosic substrates into ethanol without the aid of any exogenous enzymes, representing CBP-based fermentation approach. Here, the broad substrate utilization spectrum of isolated cellulolytic thermophilic anaerobic bacterium was shown to be of potential utility. We demonstrated that the co-culture strategy involving novel strains is efficient in improving ethanol production from real substrate.Electronic supplementary materialThe online version of this article (doi:10.1186/s13068-017-0756-6) contains supplementary material, which is available to authorized users.

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“…Macroalgae use as a bioethanol substrate has several advantages over terrestrial plants, where they have significantly larger area productivity (Table 1), do not compete with conventional food-based agriculture, do not require irrigation, recycle ocean bicarbonate, and are compatible with existing production streams and biorefineries [19] [20] [21]. Despite this, saccharification of biomass into fermentable sugars for bioethanol production still remains to be one of the main challenges [22].…”

Section: Advances In Microbiologymentioning

confidence: 99%

Fermentative Bioethanol Production Using Enzymatically Hydrolysed <i>Saccharina latissima</i>

Lamb¹,

Sarker²,

Hjelme³

et al. 2018

AiM

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The increased demand for machinery and transport has led to an overwhelming increase in the use of fossil fuels in the last century. Concerning the economic and environmental concern, macroalgae with high fermentable polysaccharide content (mainly mannitol, cellulose and laminarin), can serve as an excellent alternative to food crops for bioethanol production, a renewable liquid fuel. In this study, Saccharina latissima, a brown macroalgae readily available on the Norwegian coast was used as the carbohydrate source for the fermentative production of bioethanol. The macroalgae harvested was found to contain 31.31 ± 1.73 g of reducing sugars per 100 g of dry Saccharina latissima upon enzymatic hydrolysis. The subsequent fermentation with Saccharomyces cerevisiae produced an ethanol yield of 0.42 g of ethanol per g of reducing sugar, resulting in a fermentation efficiency of 84% as compared to the theoretical maximum. Using these results, an evaluation of the fermentation process has demonstrated that the brown macroalgae Saccharina latissima could become a viable bioethanol source in the future.

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Pilot scale study on steam explosion and mass balance for higher sugar recovery from rice straw

Cited by 71 publications

References 23 publications

Xylose production from corn stover biomass by steam explosion combined with enzymatic digestibility

Xylose production from corn stover biomass by steam explosion combined with enzymatic digestibility

Cellulosic ethanol production via consolidated bioprocessing by a novel thermophilic anaerobic bacterium isolated from a Himalayan hot spring

Fermentative Bioethanol Production Using Enzymatically Hydrolysed <i>Saccharina latissima</i>

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Pilot scale study on steam explosion and mass balance for higher sugar recovery from rice straw

Cited by 71 publications

References 23 publications

Xylose production from corn stover biomass by steam explosion combined with enzymatic digestibility

Xylose production from corn stover biomass by steam explosion combined with enzymatic digestibility

Cellulosic ethanol production via consolidated bioprocessing by a novel thermophilic anaerobic bacterium isolated from a Himalayan hot spring

Fermentative Bioethanol Production Using Enzymatically Hydrolysed &lt;i&gt;Saccharina latissima&lt;/i&gt;

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Fermentative Bioethanol Production Using Enzymatically Hydrolysed <i>Saccharina latissima</i>