Dilute acid pretreatment of lignocellulose for whole slurry ethanol fermentation

Jung, Young Hoon; Kim, In Jung; Kim, Hyun Kyung; Kim, Kyoung Heon

doi:10.1016/j.biortech.2012.12.151

Cited by 133 publications

(56 citation statements)

References 28 publications

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“…Increasing the temperature from 160 to 200 ºC decreased the amount of solid residue by 29-35%, which can be attributed to the high solubility of cellulose, hemicellulose and lignin by acid, although the dissolution of cellulose is relatively slow [20]. The DS is the main parameter when observing the delignification effectiveness of pretreatment.…”

Section: Figurementioning

confidence: 99%

Disruption of Oil Palm Empty Fruit Bunches by Microwave-assisted Oxalic Acid Pretreatment

Solihat

Sari

Risanto

et al. 2017

J. Math. Fund. Sci.

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Abstract. Developing an effective pretreatment for the conversion of lignocellulosic biomass to ethanol is an important effort in reducing the cost of this process. Microwave-assisted pretreatment is considered a green technology that can effectively break down lignocellulosic structures. The objective of this study was to investigate the most effective temperature for microwave-assisted oxalic acid pretreatment regarding the structural characteristic changes of oil palm empty fruit bunches (OPEFB) fibers. The fibers were subjected to microwave-assisted oxalic acid pretreatment at 160-200 °C with 2.5 minutes heating time and a liquid to solid ratio of 10. The effectiveness of the pretreatment was determined based on its delignification selectivity, morphological characteristics, and functional group changes. Microwave irradiation of OPEFB fibers at 180 ºC was effective in increasing the cellulose content by 24%. This pretreatment resulted in 1.82 delignification selectivity. More than 50% of the hemicellulose of the OPEFB was removed after this treatment, which was confirmed by a decrease of the absorption bands of functional groups at 1732 cm -1 . The increase of pretreatment temperature disrupted the morphological structure of the OPEFB and removed its hemicellulose but did not change its functional groups and lignin content.

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Section: Figurementioning

confidence: 99%

Disruption of Oil Palm Empty Fruit Bunches by Microwave-assisted Oxalic Acid Pretreatment

Solihat

Sari

Risanto

et al. 2017

J. Math. Fund. Sci.

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show abstract

“…effectiveness of acid pretreatment [12]. In this work, dilute sulfuric acid was chosen as the pretreatment catalyst, and the drying methods were evaluated by the acid pretreatment.…”

Section: Effect Of Oven-dried Methods On Dilute Sulfuric Acid Pretreatmentioning

confidence: 99%

Effect of Drying Method of Corn Stover on Sugar Recovery during Dilute Sulfuric Acid Pretreatment

Yao¹,

Sun²,

Zhang³

2016

JRST

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ABSTRACT:The effects of drying method on the sugar conversion of corn stover during dilute sulfuric acid pretreatment were studied. oven-dried corn stover (oDCS) was more sensitive to temperature and time during dilute sulfuric acid pretreatment than air-dried corn stover (aDCS). The yield of the total reducing sugar reached 43.9% when oDCS was pretreated for 50 min at 120°C, which was even higher than the value of the aDCS treated for 90 min. The glucose yield of oDCS was 1.6-to 1.9-fold higher than aDCS. These results indicate that rapidly losing water is a better drying method compared to air drying.

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“…In this study, the ''one-factor at-a-time'' optimization strategy was applied to augment hydrolytic efficiency by optimizing time, temperature, acid concentration and ratio of solid to acid solution respectively [26,27]. Fig 2 has shown that the maximal glucose concentration (6.37 g/L) was obtained under the hydrolysis condition of 1:7 ratio of solid to acid solution, 32 % (w/v) concentration of sulfuric acid solution at 90℃ for 90 min whose combined optimization effect could contribute to an approximately 142-fold increase in glucose concentration.…”

Section: Optimization Of Acid Hydrolysis Conditionmentioning

confidence: 99%

Isoprenoids Production from Lipid-Extracted Microalgal Biomass Residues Using the Engineered <em>E. coli</em>

Wang¹,

Yang²

2017

Preprint

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Microalgae are recognized as a third generation feedstock for biofuel production due to its rapid growth rate and lignin-free characteristic. In this study, the lipid extracted microalgal biomass residues was used as the material to produce isoprene, α-pinene and β-pinene with the engineered E. coli strain. We adopted an optimal sulfuric acid hydrolysis method (1:7 ratio of solid to acid solution, 32 % (w/v) concentration of sulfuric acid solution at 90℃ for 90 min) to convert holocellulose into glucose efficiently (6.37 g/L) and explored a novel detoxification strategy (phosphoric acid/calcium hydroxide) to remove inhibitors notably. 55.32 % acetic acid, 99.19 % furfural and 98.22 % 5-HMF (5-hydroxymethylfurfural) were cut down with the phosphoric acid/calcium hydroxide method, and the fermentation concentration of isoprene (223.23 mg/L), α-pinene (382.21 μg/L) and β-pinene (17.4 mg/L) using the detoxified hydrolysate as the carbon source account for approximately 86.02 %, 90.16 % and 88.32 % of those produced by the engineered E. coli strain fermented on pure glucose, respectively.

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Dilute acid pretreatment of lignocellulose for whole slurry ethanol fermentation

Cited by 133 publications

References 28 publications

Disruption of Oil Palm Empty Fruit Bunches by Microwave-assisted Oxalic Acid Pretreatment

Disruption of Oil Palm Empty Fruit Bunches by Microwave-assisted Oxalic Acid Pretreatment

Effect of Drying Method of Corn Stover on Sugar Recovery during Dilute Sulfuric Acid Pretreatment

Isoprenoids Production from Lipid-Extracted Microalgal Biomass Residues Using the Engineered <em>E. coli</em>

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