volume 10, Article number: 130 (2017) The observed effect on the ASL content is similar as it has been reported previously in liquid hot water pretreatments with 2-naphthol [20], further confirming that 2-naphthol is effectively applicable to a steam pretreatment, too. This is the first study to show that a carbocation scavenger in steam pretreatment can enhance the enzymatic digestibility of lignocellulosic biomass. Jérémie Damay, Iulian-Zoltan Boboescu, Xavier Duret, Olivier Lalonde, Jean-Michel Lavoie. Figure 3a shows the cellulose conversions in the enzymatic hydrolysis of steam exploded biomass that had been 2-naphthol-impregnated using acetone. You’ve supercharged your research process with ACS and Mendeley! pH of pretreatment liquor after steam explosion pretreatments without additive and with 2-naphthol addition by mixing and impregnation. Bundit Inseemeesak, Chinnathan Areeprasert. Steam explosion pretreatment of willow grown on phytomanaged soils for bioethanol production. The flakes in the mix stick to the moist wood chips so that the blend is not demixed when filling the reactor. Huimei Wang, Zhong Liu, Xu Zheng, Xuejun Pan, Lanfeng Hui, Jingzhi Li, Hao Zhang. Tengborg C, Stenberg K, Galbe M, Zacchi G, Larsson S, Palmqvist E, Hahn-Hägerdal B. Lignin transformations for high value applications: towards targeted modifications using green chemistry. In: Oak Ridge National Laboratory Report ORNL/TM-2005/66. Enhanced enzymatic hydrolysis and methane production from rubber wood waste using steam explosion. or in a thesis or dissertation provided that the correct acknowledgement is given Golden: National Renewable Energy Laboratory; 2006. For higher enzyme dosages, the 2-naphthol develops a good effect particularly at medium severities. Those experiments show for the first time that a carbocation scavenger can enhance the steam pretreatment of lignocellulosic biomass. Nayve, Jr.. Optimization of Acid and Steam Explosion Pretreatment of Cogon Grass for Improved Cellulose Enzymatic Saccharification. The explosion enhances the accessibility of the cellulose while the use of the scavenger reduces particularly the deactivation of enzymes.
Modified hemp fibers intended for fiber‐reinforced polymer composites used in structural applications—A review. In twenty-first symposium on biotechnology for fuels and chemicals. The aromatic 2-naphthol structure is integrated into the lignin molecule forming a covalent bond, which is supposed to increase UV-absorption in the ASL measurement. The biomass filter cake was not washed and its dry matter content was determined in duplicate. The studies employ a solid content in enzymatic hydrolysis of 2–3% w/w, which is in good agreement with the solid content in the hydrolysis of the 2-naphthol experiments (2.2–3.0% w/w) and allows for a good comparability. These effects allow the opening of lignocellulosic structures and influence the enzymatic hydrolysis yield of the material. 1) and the simplest way of adding it to a steam pretreatment is by mixing with the biomass before steaming. Results are shown for different pretreatment severities (logR Selig M, Weiss N, Ji Y. NREL/TP-510-42629. In: Zhu J, Zhang X, Pan X, editors. Li Shuai, Ydna M. Questell-Santiago, Jeremy S. Luterbacher.
Biotechnol Bioeng. Efforts to implement a two-stage pretreatment should allow for exceptionally high total sugar yields from softwood.
The mannose and glucose yields in the pretreatment liquor were decreased by the 2-naphthol impregnation of the biomass, both with acetone and ethanol (Fig. The results showed that SE promoted the dissolution of phenolics, particularly, the content of the bound fraction was nearly increased by two times (0.36 vs. 0.99 mg GAE per g DW). The results show that the impregnation with ethanol works also very efficiently and the cellulose digestibility was enhanced by up to 192% relatively compared to the control (logR The influence of lignin on the enzymatic hydrolysis of pretreated biomass substrates.
J Chem Technol Biotechnol. An overview of the experimental conditions and pretreatment severities is shown in Table 1.
The explosion did in most cases distinctly improve the pretreatment and could enhance cellulose conversion by up to 97% relatively compared to the non-exploded samples (logR
Equilibrium, kinetics and thermodynamics of Cu(II) biosorption on Chinese chestnut shell pretreated with steam explosion. Lignocellulosics as sustainable resources for production of bioplastics – A review. Asada C, Sasaki C, Uto Y, Sakafuji J, Nakamura Y. Pretreatment technologies for an efficient bioethanol production process based on enzymatic hydrolysis: a review. For reproduction of material from all other RSC journals and books: For reproduction of material from all other RSC journals. A kinetic study of lignin pyrolysis over base catalyst during steam exploded depolymerization. Limayem A, Ricke SC. Manage cookies/Do not sell my data we use in the preference centre. Advances in Materials Science and Engineering. Yun Li, Benkun Qi, Jianquan Luo, and Yinhua Wan .
4c, d) nor on the pH of the pretreatment liquor (Additional file 1: Figure S1). Pilot-scale steam explosion pretreatment with 2-naphthol to overcome high softwood recalcitrance.
Mechanical and Thermal Pretreatment Processes for Increasing Sugar Production from Woody Biomass Via Enzymatic Hydrolysis.
Ind Crop Prod. Glucose,EH sample is the mass of glucose released during the enzymatic hydrolysis experiment and m Comparison of ethanol production from corn cobs and switchgrass following a pyrolysis-based biorefinery approach. Green Chem. It is pointed out that the scavenger process does not remove lignin from the biomass and increases the biomass digestibility in that way.
Stirred liquid hot water pretreatments do however not allow for high biomass loadings and thus demand a high energy input for heating up large amounts of water and for the downstream product purification, which is why they are not developed at commercial scale [12, 23]. TP wrote the article.
0 = 4.4, 60 FPU g−1 cellulose). (3). It did however increase the measured ASL content in the pretreated biomass by up to 75% (Fig. Although intensive efforts have been made during the last decades, few breakthroughs have been achieved in developing high-value and marketable lignin products. Isabelle Ziegler-Devin, Zahra Menana, Laurent Chrusciel, Michel Chalot, Valérie Bert, Nicolas Brosse. For instance, ethanol dissolves 2-naphthol as well and can be produced itself in a cellulosic ethanol process. Pielhop, T., Amgarten, J., Studer, M.H.
The slurry obtained in all pretreatments was weighed and then filtered recording weight and pH of the filtrate. Comparison of SO2 and H2SO4 impregnation of softwood prior to steam pretreatment on ethanol production. Ethanol production from residual lignocellulosic fibers generated through the steam treatment of whole sorghum biomass. Zhaoyang Yuan, Guodong Li, Weiqi Wei, Jiarun Wang, Zhen Fang. to reproduce figures, diagrams etc. The corresponding results in enzymatic hydrolysis are shown in Fig. 2009;100:6312–6. Samples were incubated in a shaker (Multitron; Infors-HT) with a shaking throw of 25 mm at 50 °C and 210 rpm for 120 h and then analyzed for sugars in the supernatant. Pielhop T, Larrazabal GO, Studer MH, Brethauer S, Seidel C-M, Rudolf von Rohr P. Lignin repolymerisation in spruce autohydrolysis pretreatment increases cellulase deactivation. In this study, SE was applied to release phenolics and improve the roughening of tartary buckwheat bran. Sluiter A, Hames B, Ruiz R, Scarlata C, Sluiter J, Templeton D, Crocker D. NREL/TP-510-42618. Increasing the pretreatment severity can allow for somewhat higher yields in the enzymatic conversion, however on the expense of a lower hemicellulosic sugar yield in the pretreatment liquor. Duff SJB, Murray WD. Biotechnol Biofuels. contained in this article in third party publications Impregnation of the biomass presumably allows to prevent lignin repolymerization from the very beginning of the pretreatment and for lower pretreatment severities in order to obtain a highly digestible cellulose. Accellerase 1500 (Genencor; lot number 4901298419), with an activity of 26 filter paper units (FPU) ml−1 measured according to the NREL method [37] was used with final concentrations of 15, 30, and 60 FPU g−1 cellulose in the sample preparation. Solvents were removed by evaporation before the pretreatment. Those high yields are remarkable as the pretreatment process has not yet been optimized. Optimization of the steam explosion and enzymatic hydrolysis for sugars production from oak woods. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
This is why enzymatic cellulose conversion is seen as a more viable strategy and the majority of the current commercial processes that convert lignocellulose to sugars employ enzymes [2, 7, 23]. Steam explosion pretreatment of softwood: the effect of the explosive decompression on enzymatic digestibility. Shown are the glucose yields in enzymatic cellulose hydrolysis (a) and the total sugar yields from the combined operations of pretreatment and enzymatic hydrolysis (b). Efficient production of acetylated xylooligosaccharides from Hawthorn kernels by a xylanase from Paecilomyces aerugineus. do not need to formally request permission to reproduce material contained in this New York: Springer; 2005. p. 1069–79. It is however not effective for overcoming the extremely high recalcitrance of softwood to biochemical conversion. 2001;35:487–502.
Burkhardt S, Kumar L, Chandra R, Saddler J.
Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Sluiter A, Hames B, Hyman D, Payne C, Ruiz R, Scarlata C, Sluiter J, Templeton D, Wolfe J. NREL/TP-510-42621. Engineering aspects of hydrothermal pretreatment: From batch to continuous operation, scale-up and pilot reactor under biorefinery concept.
Appl Biochem Biotechnol. Effect of steam explosion treatment on chemical composition and characteristic of organosolv fescue lignin. Softwood is the dominant lignocellulosic feedstock available in the Northern hemisphere and a potential source for fermentable carbohydrate in the United States, Canada, Scandinavia [4], South America [5], China [6], and Russia [7]. Surprisingly, very high severities lead to a fairly accessible cellulose also in the pretreatments without explosion. The pH of the pretreatment liquor was not influenced by the biomass impregnation with 2-naphthol (Additional file 1: Figure S1). Wanbao Chen, Shuo Zhang, Yan Li, Hao Wu, Qingxiang Meng, Zhenming Zhou. J Am Chem Soc. Shevchenko SM, Chang K, Dick DG, Gregg DJ, Saddler JN. W. Li, X. Zhang, X. 0 = 5.2, 15 FPU g−1 cellulose). The pretreatments at high temperature did not lead to severe cellulose degradation. Li J, Gellerstedt G. Improved lignin properties and reactivity by modifications in the autohydrolysis process of aspen wood. All authors read and approved the final manuscript. In order to study the importance of mass transfer effects, two different ways of adding the solid scavenger were evaluated: mixing of the biomass with the solid catalyst and impregnation of the biomass with a 2-naphthol solution before pretreatment. It should also be emphasized that the enzymatic hydrolysis was performed with unwashed biomass, which was implemented in all other processes to reduce byproduct inhibition. This is in particular true for the two-stage treatments, which dissolve up to 57% cellulose (compare Table 2). Steam explosion (SE) is an efficient technology to disrupt materials for improving their quality. Morales M, Pielhop T, Saliba P, Hungerbühler K, Rudolf von Rohr P, Papadokonstantakis S. Sustainability assessment of glucose production technologies from highly recalcitrant softwood including scavengers.