High-performance removal of acids and furans from wheat straw pretreatment liquid by diananofiltration

Sueb, Mohd Shafiq Mohd; Zdarta, Jakub; Jesionowski, Teofil; Jonsson, Gunnar Eigil; Meyer, Anne S.; Jørgensen, Henning; Pinelo, Manuel

doi:10.1080/01496395.2017.1302951

Cited by 12 publications

(4 citation statements)

References 37 publications

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“…It is known that, after the pretreatment, the concentrations of glucose and xylose in the biomass liquors vary depending on the source of the biomass and the pretreatment method; however, the total amount of xylose is usually approx. 5 to even 10 times higher than the glucose content [11,25]. Moreover, both co-immobilized enzymes are characterized by different activities as well as various pH and temperature optima.…”

Section: Discussionmentioning

confidence: 99%

“…Various pretreatment and conversion methods have been developed, including mechanical, physical and biological techniques [10]. Nevertheless, due to mild process conditions, the limited requirement for sophisticated apparatuses and high selectivity, biological methods based on enzymes are of particular interest [11]. It should be emphasized that the effectiveness of hydrolysis or the conversion of lignocellulose substrates depends on their effective preparation and the precise selection of the enzyme combination.…”

Section: Introductionmentioning

confidence: 99%

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Co-Immobilization of Glucose Dehydrogenase and Xylose Dehydrogenase as a New Approach for Simultaneous Production of Gluconic and Xylonic Acid

et al. 2019

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The conversion of biomass components catalyzed via immobilized enzymes is a promising way of obtaining valuable compounds with high efficiency under mild conditions. However, simultaneous transformation of glucose and xylose into gluconic acid and xylonic acid, respectively, is an overlooked research area. Therefore, in this work we have undertaken a study focused on the co-immobilization of glucose dehydrogenase (GDH, EC 1.1.1.118) and xylose dehydrogenase (XDH, EC 1.1.1.175) using mesoporous Santa Barbara Amorphous silica (SBA 15) for the simultaneous production of gluconic acid and xylonic acid. The effective co-immobilization of enzymes onto the surface and into the pores of the silica support was confirmed. A GDH:XDH ratio equal to 1:5 was the most suitable for the conversion of xylose and glucose, as the reaction yield reached over 90% for both monosaccharides after 45 min of the process. Upon co-immobilization, reaction yields exceeding 80% were noticed over wide pH (7–9) and temperature (40–60 °C) ranges. Additionally, the co-immobilized GDH and XDH exhibited a significant enhancement of their thermal, chemical and storage stability. Furthermore, the co-immobilized enzymes are characterized by good reusability, as they facilitated the reaction yields by over 80%, even after 5 consecutive reaction steps.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Co-Immobilization of Glucose Dehydrogenase and Xylose Dehydrogenase as a New Approach for Simultaneous Production of Gluconic and Xylonic Acid

et al. 2019

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“…In order to evaluate the performance of the downstream separation, the permeate streams leaving the membrane bioreactor were further subjected to low-pressure NF. Single-component model solutions based on a similar (WS) pretreatment liquor were previously evaluated in [27]. In the following discussion, the various interactions between solutes and between solutes and the membrane (Donnan effect and electrostatic repulsion in particular) in the multi-component solutions are assessed.…”

Section: Downstream Separationmentioning

confidence: 99%

Membrane separation of enzyme-converted biomass compounds: Recovery of xylose and production of gluconic acid as a value-added product

Morthensen

Zeuner

Meyer

et al. 2018

Separation and Purification Technology

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“…Other researchers have treated membrane application in biorefineries with emphasis on the removal of inhibitors from real and synthetic hydrolysate solutions prior to the conversion of sugars into biofuels or biochemicals by fermentation [ 15 , 16 , 17 , 18 , 19 , 20 ]. Some of those earlier reported studies have been reviewed [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ], and a few relevant examples are summarized in Table 1 .…”

Section: Introductionmentioning

confidence: 99%

Study of Separation and Fouling of Reverse Osmosis Membranes during Model Hydrolysate Solution Filtration

et al. 2017

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Prehydrolysate, a dilute solution consisting mainly of pentoses, hexoses, and lesser quantities of organic acids, furfural and phenolics, is generated in the Kraft dissolving pulp process. An obstacle facing the valorization of the solution in hemicellulose biorefineries, by conversion of the sugars into bioproducts such as furfural, is the low sugar concentration. Membrane filtration is typically proposed in several hemicellulose based biorefineries for concentrating the solution, although they are usually generated using different wood species, pretreatment methods, and operating conditions. However, the chemical composition of the solutions is generally not considered. Also, the combined effect of composition and operating conditions is rarely investigated for biorefinery applications. The purpose of this work was to determine the impact of the prehydrolysate composition and operating parameters on the component separation and permeate flux during membrane filtration. Using model prehydrolysate solutions, two commercial reverse osmosis (RO) membranes were screened, and one was selected for use, based on its higher sugar and acetic acid retention. A Taguchi L18 experimental design array was then applied to determine the dominant parameters and limiting factors. Results showed that the feed pressure and temperature have the highest impact on permeate flux, but the least effect on sugar retention. Further experiments to quantify flux decline, due to fouling and osmotic pressure, showed that furfural has the highest membrane fouling tendency, and can limit the lifetime of the membrane. Regeneration of the membrane by cleaning with a sodium hydroxide solution is also effective for reversing fouling. It has been demonstrated that RO can efficiently and sustainably concentrate wood prehydrolysate.

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High-performance removal of acids and furans from wheat straw pretreatment liquid by diananofiltration

Cited by 12 publications

References 37 publications

Co-Immobilization of Glucose Dehydrogenase and Xylose Dehydrogenase as a New Approach for Simultaneous Production of Gluconic and Xylonic Acid

Co-Immobilization of Glucose Dehydrogenase and Xylose Dehydrogenase as a New Approach for Simultaneous Production of Gluconic and Xylonic Acid

Membrane separation of enzyme-converted biomass compounds: Recovery of xylose and production of gluconic acid as a value-added product

Study of Separation and Fouling of Reverse Osmosis Membranes during Model Hydrolysate Solution Filtration

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