Pretreatment of rapeseed straw by soaking in aqueous ammonia

Kang, Kyoung Ho; Jeong, Gwi‐Taek; Sunwoo, Changshin; Park, Don-Hee

doi:10.1007/s00449-011-0606-z

Cited by 52 publications

(29 citation statements)

References 34 publications

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“…In general, rapeseed straw is composed of three main fractions, including 34% cellulose, 19% hemicelluloses, and 6.9% lignin [12]. Relatively few studies have reported on the use of rapeseed straw as a bioenergy source [2,[9][10][11][12]. Thermal applications, such as pyrolysis, have been applied to energy production from rapeseed straw [11].…”

Section: Introductionmentioning

confidence: 99%

“…Due to its high content of fermentable sugars (more than 60%), rapeseed straw has been suggested as a raw material for use as a biofuel feedstock [2]. In general, rapeseed straw is composed of three main fractions, including 34% cellulose, 19% hemicelluloses, and 6.9% lignin [12]. Relatively few studies have reported on the use of rapeseed straw as a bioenergy source [2,[9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…Especially in Korea, cultivation of rapeseed crops has been attempted for use as an energy crop and for increase of rural household incomes during fallow periods. After seed harvesting, rapeseed straw is useful as a resource for biofuel production [9][10][11][12]. Due to its high content of fermentable sugars (more than 60%), rapeseed straw has been suggested as a raw material for use as a biofuel feedstock [2].…”

Section: Introductionmentioning

confidence: 99%

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Pretreatment of rapeseed straw by sodium hydroxide

Kang

Jeong

Park

2011

Bioprocess Biosyst Eng

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Pretreatment method for rapeseed straw by sodium hydroxide was investigated for production of bioethanol and biobutanol. Various pretreatment parameters, including temperature, time, and sodium hydroxide concentration were optimized using a statistical method which is a central composite design of response surface methodology. In the case of sodium hydroxide pretreatment, optimal pretreatment conditions were found to be 7.9% sodium hydroxide concentration, 5.5 h of reaction time, and 68.4 °C of reaction temperature. The maximum glucose yield which can be recovered by enzymatic hydrolysis at the optimum conditions was 95.7% and the experimental result was 94.0 ± 4.8%. This experimental result was in agreement with the model prediction. An increase of surface area and pore size in pretreated rapeseed straw by sodium hydroxide pretreatment was observed by scanning electron microscope.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pretreatment of rapeseed straw by sodium hydroxide

Kang

Jeong

Park

2011

Bioprocess Biosyst Eng

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“…The pretreatment suffers from low glucose digestibility most likely linked to lower lignin removal compared to other alkali pretreatments [43]. Also, because xylan remains in solids, it blocks the access of enzymes to the substrate.…”

Section: Nhmentioning

confidence: 99%

Biomass processing into ethanol: pretreatment, enzymatic hydrolysis, fermentation, rheology, and mixing

Volynets

Ein‐Mozaffari

Dahman

2016

Green Processing and Synthesis

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Alternate energy resources need to be developed to amend for depleting fossil fuel reserves. Lignocellulosic biomass is a globally available renewable feedstock that contains a rich sugar platform that can be converted into bioethanol through appropriate processing. The key steps of the process, pretreatment, enzymatic hydrolysis, and fermentation, have undergone considerable amount of research and development over the past decades nearing the process to commercialization. In order for the commercialization to be successful, the process needs to be operated at high dry matter content of biomass, especially in the enzymatic hydrolysis stage that influences ethanol concentration in the final fermentation broth. Biomass becomes a thick paste with challenging rheology for mixing to be effective. As the biomass consistency increases, yield stress increases which limits efficiency of mixing with conventional stirred tanks. The purpose of this review is to provide features and perspectives on processing of biomass into ethanol. Emphasis is placed on rheology and mixing of biomass in the enzymatic hydrolysis step as one of the forefront issues in the field.

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“…Soaking in aqueous ammonia was adopted for corn stover and rapeseed straw for ethanol production at room temperature and 69 ˚C (Kim and Lee 2005;Kang et al 2012). Cañeque and Velasco (1998) focused on the application of ammoniated straw as animal feed, and they found that straw pretreated at 30% relative humidity and at a relatively high temperature increased the digestion rate and N content of the straw.…”

Section: Introductionmentioning

confidence: 99%

Effects of Ammoniation Pretreatment at Low Moisture Content on Anaerobic Digestion Performance of Rice Straw

Yuan¹,

Zhang²,

Li³

et al. 2014

BioResources

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The effect of ammonia pretreatment on the anaerobic digestion performance of rice straw was investigated. The rice straw was pretreated with four different moisture contents (30%, 50%, 70%, and 90%) and three concentrations of ammonia (2%, 4%, and 6%). The results showed that the anaerobic digestion achieved best performance for the rice straw pretreated by ammonia concentration of 4% and moisture content of 70%, and biogas yield achieved the highest value (396.92 mL·g -1 total solid), which was 21.9% higher than that of the untreated rice straw. Higher moisture was recommended as it could increase system stability, shorten anaerobic digestion time, and increase biogas production. The composition analyses indicated that ammonia pretreatment could effectively destroy the chemical structure of lignocellulose, and partially decompose cellulose, hemicellulose, and lignin. Cellulose and hemicellulose were converted by 79.2% and 63.2%, respectively, at optimal ammonia amount and moisture content. The ammonia pretreatment proved to be a simple and effective methods to improve the anaerobic digestion performance of rice straw.

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Pretreatment of rapeseed straw by soaking in aqueous ammonia

Cited by 52 publications

References 34 publications

Pretreatment of rapeseed straw by sodium hydroxide

Pretreatment of rapeseed straw by sodium hydroxide

Biomass processing into ethanol: pretreatment, enzymatic hydrolysis, fermentation, rheology, and mixing

Effects of Ammoniation Pretreatment at Low Moisture Content on Anaerobic Digestion Performance of Rice Straw

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