Design and operation of a bench-scale process development unit for the production of ethanol from lignocellulosics

Palmqvist, Eva; Hahn‐Hägerdal, Bärbel; Galbe, Mats; Larsson, Mats; Stenberg, Kerstin; Szengyel, Zsolt; Tengborg, Charlotte; Zacchi, Guido

doi:10.1016/s0960-8524(96)00096-x

Cited by 136 publications

(63 citation statements)

References 13 publications

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“…After 20 min of impregnation, the bags were ventilated before the material was steam pretreated. Pretreatment was performed in a 10 l batch reactor, described earlier [22]. After steam pretreatment, the slurry was collected from the flash cyclone and stored at þ5 C a few days.…”

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confidence: 99%

Steam pretreatment of dry and ensiled industrial hemp for ethanol production

Sipos

Kreuger

Svensson

et al. 2010

Biomass and Bioenergy

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103

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International audienceBiomass can be converted into liquid and gaseous biofuels with good efficiency. In this study, the conversion of industrial hemp ( L.), a biomass source that can be cultivated with a high biomass yield per hectare, was used. Steam pretreatment of dry and ensiled hemp was investigated prior to ethanol production. The pretreatment efficiency was evaluated in terms of sugar recovery and polysaccharide conversion in the enzymatic hydrolysis step. For both materials, impregnation with 2% SO followed by steam pretreatment at 210°C for five minutes were found to be the optimal conditions leading to the highest overall yield of glucose. Simultaneous saccharification and fermentation experiments carried out with optimised pretreatment conditions resulted in ethanol yields of 163 g kg ensiled hemp (dry matter) (71% of the theoretical maximum) and 171 g kg dry hemp (74%), which corresponds to 206-216 l Mg ethanol based on initial dry material

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mentioning

confidence: 99%

Steam pretreatment of dry and ensiled industrial hemp for ethanol production

Sipos

Kreuger

Svensson

et al. 2010

Biomass and Bioenergy

Self Cite

103

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“…Pretreatment was modeled based on lab-scale results obtained using wheat straw impregnated with H 2 SO 4 , which was pretreated in a 10-L steam-pretreatment unit, as described by Palmqvist et al [40]. The pretreatment conditions and the impregnation procedure, utilizing an aqueous solution of 0.2% H 2 SO 4 , are described in more detail by Linde et al [32].…”

Section: Description Of the 2g Stand-alone Plant Pretreatmentmentioning

confidence: 99%

Heat integration of combined 1st and 2nd generation ethanol production from wheat kernels and wheat straw

Joelsson

Galbe

Wallberg

2014

Sustain Chem Process

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Background: Reducing the energy used in an ethanol plant is an important step towards reducing both the cost and environmental impact of the process. Pinch technology was used to analyze the energy utilization and to investigate possible energy savings in stand-alone and combined 1 st and 2 nd generation ethanol production plant designs. Different heat sources and sinks in the plant were identified to improve energy integration. Four different scenarios were evaluated using Aspen Plus, with heat exchanger networks generated in the simulation program Aspen Energy Analyzer. The total direct cost of the heat exchanger networks was calculated using Aspen Process Economic Analyzer.

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“…Lastly, the purification process efficiency was found out to be 22.2%. The residual ethanol in the broth obtained with the water condensates can be completely recuperated by numerous distillation steps as encompassed in large scale operations [14].…”

Section: Ethanol Recovery With Determination Of Purification Process mentioning

confidence: 99%

“…As a consequence, in recent years, research is focused on Z. mobilis, as promising alternative ethanol producer because of its high glucose uptake and high ethanol tolerance. The rotary vaccum evaporation, distillation and pervaporation are frequently used for retrieval of various fermentation products [14].…”

Section: Introductionmentioning

confidence: 99%

Scale up and efficient bioethanol production involving recombinant cellulase (Glycoside hydrolase family 5) from Clostridium thermocellum

Das

Deka

Ghosh

et al. 2013

sustain chem process

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Background: Lignocellulose degrading fungal enzymes have been in use at industrial level for more than three decades. However, the main drawback is the high cost of the commercially available Trichoderma reesei cellulolytic enzymes. Results: The hydrolytic performance of a novel Clostridium thermocellum cellulolytic recombinant cellulase expressed in Escherichia coli cells was compared with the naturally isolated cellulases in different modes of fermentation trials using steam explosion pretreated thatch grass and Zymomonas mobilis. Fourier transform infrared (FT-IR) spectroscopic analysis confirmed the efficiency of steam explosion pretreatment in significant release of free glucose moiety from complex lignocellulosic thatch grass. The recombinant GH5 cellulase with 1% (w v

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Design and operation of a bench-scale process development unit for the production of ethanol from lignocellulosics

Cited by 136 publications

References 13 publications

Steam pretreatment of dry and ensiled industrial hemp for ethanol production

Steam pretreatment of dry and ensiled industrial hemp for ethanol production

Heat integration of combined 1st and 2nd generation ethanol production from wheat kernels and wheat straw

Scale up and efficient bioethanol production involving recombinant cellulase (Glycoside hydrolase family 5) from Clostridium thermocellum

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