Pretreatment and fractionation of corn stover by ammonia recycle percolation process

Kim, Tae Hyun; Lee, Yoon Y.

doi:10.1016/j.biortech.2005.01.015

Cited by 295 publications

(123 citation statements)

References 8 publications

Supporting

Mentioning

115

Contrasting

Order By: Relevance

“…More importantly, it reduced the requirement for the second pretreatment and, as a result, the treatment temperature in the second pretreatment did not have a significant effect on the final sugar yield, as shown in Figure 2. Table 1 summarizes the cellulose conversion yields of corn stover pretreated by selected pretreatment methods, which have been under investigation for over 20 years [7,9,25,26]. It can be seen that the cellulose conversion yields of corn stover pretreated by electrolyzed water and the two-step method are higher than that obtained from the diluted sulfuric acid pretreatment, but lower than those of other methods (ARP, AFEX and lime).…”

Section: Electrolyzed Water Pretreatmentmentioning

confidence: 99%

Ethanol production from corn stover pretreated by electrolyzed water and a two-step pretreatment method

Wang

Feng

2012

Chin. Sci. Bull.

View full text Add to dashboard Cite

Pretreatment is one of the most important unit operations for ethanol production from biomass feedstocks. In this study, corn stover was used as a feedstock to examine the effectiveness of two pretreatments: electrolyzed water pretreatment and a two-step pretreatment. Electrolyzed water was employed as a catalyst to conduct one-step pretreatment of corn stover at three temperatures (165, 180 and 195°C) and three treatment times (10, 20 and 30 min). During the two-step pretreatment process, an organic alkaline solution of 1% (w/w) NaOH in 70% (w/w) ethanol was used for lignin removal in the first step, followed by a second step using hot water. No furfural or 5-hydroxymethyl furfural was detected in the hydrolysates from both pretreatment methods when the detection limit of the HPLC was 0.2 g/L. The highest glucan conversion yields were 83% obtained at 195°C for 30 min with acidic electrolyzed water and 83% by the two-step process, where the second step of the pretreatment was at 135°C for 30 min. The hydrolyzates from the two pretreatment methods showed good performance in Saccharomyces cerevisiae fermentation tests. The two new methods may provide promising alternatives for the pretreatment of biomass for ethanol production. ethanol, biomass, pretreatment, inhibitor Citation:Wang X J, Feng H, Li Z Y. Ethanol production from corn stover pretreated by electrolyzed water and a two-step pretreatment method.

show abstract

Section: Electrolyzed Water Pretreatmentmentioning

confidence: 99%

Ethanol production from corn stover pretreated by electrolyzed water and a two-step pretreatment method

Wang

Feng

2012

Chin. Sci. Bull.

View full text Add to dashboard Cite

show abstract

“…Then, the samples were sprayed with AuPd (Kim and Lee 2005;Mosier et al 2005;Zeng et al 2007) and imaged with a KYKY-2800 scanning electron microscope (KYKY Technology Development Ltd., China) operated at an accelerating voltage of 10 kV.…”

Section: Scanning Electron Microscopy (Sem) Of Pretreated Poplarmentioning

confidence: 99%

Enhanced Enzymatic Hydrolysis of Poplar after Combined Dilute NaOH and Fenton Pretreatment

et al. 2016

View full text Add to dashboard Cite

Five types of pretreatment processes were investigated to confirm the enhancement of the enzymatic hydrolysis of poplar. These processes included a hot water pretreatment, a calcium oxide pretreatment, NaOH extraction at low temperature, a Fenton reaction, and a combined dilute NaOH and Fenton pretreatment. The combined dilute NaOH and Fenton pretreatment was found to be the most effective pretreatment process. After enzymatic hydrolysis for 72 h, 74% of the cellulose recovery yield was obtained when the poplar substrates were pretreated with 2% NaOH at 75 °C for 3 h, followed by 20 mmol/g of H2O2 (30%) and 0.2 mmol/g of FeSO4·7H2O for a Fenton reaction period of 12 h. The cellulose recovery yield was approximately five-fold greater than that of the untreated sample directly processed by enzymatic hydrolysis. Furthermore, microscopic observations of changes in the surface structure of the pretreated residue were correlated with the enhancement of the enzymatic hydrolysis of cellulose. In conclusion, the combined dilute NaOH and Fenton pretreatment shows high potential for future application.

show abstract

“…SSCF has become more attractive with the emergence of new microorganisms that produce ethanol at a high yield from both glucose and xylose and reduce inhibition hydrolysis by xylose (Kim and Lee, 2005).…”

Section: Introductionmentioning

confidence: 99%

KINETIC MODEL DEVELOPMENT ON SOURCE-SEPARATED ORGANIC WASTE FOR ETHANOL PRODUCTION BY S. cerevisiae STRAIN

Bekmuradov

Luk

Crupi³

et al. 2017

International Conference on Bioscience and Biotechnology

View full text Add to dashboard Cite

Ethanol production from organic fraction of municipal solid waste with inclusion of construction/demolition waste can be an effective waste management strategy to overcome the growing problems with landfill space and dependency on conventional fuels. The main challenge in ethanol conversion is the high cost of processing in which pre-treatment, enzymatic hydrolysis and fermentation are the major steps. This study investigates impact of several key parameters, namely: pH, temperature, adsorption capacity, cellulose hydrolysis rate, cell mass, enzyme and substrate loading doses on ethanol yield. The pre-treatment incorporates pre-processing and enzymatic hydrolysis steps through the use of a thermal screw press (TSP) and cellulose-organic-solvent based lignocellulosic fractionation (COSLIF) on the source-separated organic (SSO) waste to liberate fermentable sugars. Enzymatic hydrolysis experiments were featured with the addition of a commercially available enzyme complex, Accellerase 1500, to mediate the process and increase sugar yields. A kinetic model that uses a semi-mechanistic rate equation for cellulose hydrolysis was adapted and modified to accommodate batch simultaneous saccharification and co-fermentation (SSCF) process on pre-treated SSO waste by yeast, Saccharomyces cerevisiae DA2416. New experimentally defined SSO parameters have been fitted into a kinetic model to evaluate the sugar and ethanol yields. It was found that the model was capable of predicting ethanol productions with diminutive variance from experiments with substrate concentrations between 10 g/L and 50 g/L. Model predictions from experimental data deviated significantly with substrate loading rate from 60 g/L and higher. Fermentation results demonstrated that S. cerevisiae DA2416 produced ethanol in the range of 35 -50 g/L, with ethanol yield of 0.48 -0.50 g of ethanol/g sugar, in 5 days with 96% cellulose conversion. This study provides important insights for investigation on the use of SSO waste for ethanol production by S. cerevisiae DA2416. Furthermore, the model was proven to be a useful tool to facilitate future process optimization for up-scale bioreactors.

show abstract

Pretreatment and fractionation of corn stover by ammonia recycle percolation process

Cited by 295 publications

References 8 publications

Ethanol production from corn stover pretreated by electrolyzed water and a two-step pretreatment method

Ethanol production from corn stover pretreated by electrolyzed water and a two-step pretreatment method

Enhanced Enzymatic Hydrolysis of Poplar after Combined Dilute NaOH and Fenton Pretreatment

KINETIC MODEL DEVELOPMENT ON SOURCE-SEPARATED ORGANIC WASTE FOR ETHANOL PRODUCTION BY S. cerevisiae STRAIN

Contact Info

Product

Resources

About