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Sitaraman H, Danes N, Lischeske JJ, Stickel JJ, Sprague MA. Coupled CFD and chemical-kinetics simulations of cellulosic-biomass enzymatic hydrolysis: Mathematical-model development and validation. Chem Eng Sci 2019. [DOI: 10.1016/j.ces.2019.05.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Concept of rice husk biorefining for levulinic acid production integrating three steps: Multi-response optimization, new perceptions and limitations. Process Biochem 2018. [DOI: 10.1016/j.procbio.2017.11.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Wood IP, Cao HG, Tran L, Cook N, Ryden P, Wilson DR, Moates GK, Collins SRA, Elliston A, Waldron KW. Comparison of saccharification and fermentation of steam exploded rice straw and rice husk. BIOTECHNOLOGY FOR BIOFUELS 2016; 9:193. [PMID: 27602056 PMCID: PMC5011935 DOI: 10.1186/s13068-016-0599-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 08/19/2016] [Indexed: 05/09/2023]
Abstract
BACKGROUND Rice cultivation produces two waste streams, straw and husk, which could be exploited more effectively. Chemical pretreatment studies using rice residues have largely focussed on straw exploitation alone, and often at low substrate concentrations. Moreover, it is currently not known how rice husk, the more recalcitrant residue, responds to steam explosion without the addition of chemicals. RESULTS The aim of this study has been to systematically compare the effects of steam explosion severity on the enzymatic saccharification and simultaneous saccharification and fermentation of rice straw and husk produced from a variety widely grown in Vietnam (Oryza sativa, cv. KhangDan18). Rice straw and husk were steam exploded (180-230 °C for 10 min) into hot water and washed to remove fermentation inhibitors. In both cases, pretreatment at 210 °C and above removed most of the noncellulosic sugars. Prolonged saccharification at high cellulase doses showed that rice straw could be saccharified most effectively after steam explosion at 210 °C for 10 min. In contrast, rice husk required more severe pretreatment conditions (220 °C for 10 min), and achieved a much lower yield (75 %), even at optimal conditions. Rice husk also required a higher cellulase dose for optimal saccharification (10 instead of 6 FPU/g DM). Hemicellulase addition failed to improve saccharification. Small pilot scale saccharification at 20 % (w/v) substrate loading in a 10 L high torque bioreactor resulted in similarly high glucose yields for straw (reaching 9 % w/v), but much less for husk. Simultaneous saccharification and fermentation under optimal pretreatment and saccharification conditions showed similar trends, but the ethanol yield from the rice husk was less than 40 % of the theoretical yield. CONCLUSIONS Despite having similar carbohydrate compositions, pretreated rice husk is much less amenable to saccharification than pretreated rice straw. This is likely to attenuate its use as a biorefinery feedstock unless improvements can be made either in the feedstock through breeding and/or modern biotechnology, or in the pretreatment through the employment of improved or alternative technologies. Physiological differences in the overall chemistry or structure may provide clues to the nature of lignocellulosic recalcitrance.
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Affiliation(s)
- Ian P. Wood
- The Biorefinery Centre, Institute of Food Research, Norwich Research Park, Colney, Norwich, NR4 7UA UK
| | | | - Long Tran
- Vietnam Academy of Agricultural Science, Hanoi, Vietnam
| | - Nicola Cook
- The Earlham Institute, Norwich Research Park, Norwich, NR4 7UG UK
| | - Peter Ryden
- The Biorefinery Centre, Institute of Food Research, Norwich Research Park, Colney, Norwich, NR4 7UA UK
| | - David R. Wilson
- The Biorefinery Centre, Institute of Food Research, Norwich Research Park, Colney, Norwich, NR4 7UA UK
| | - Graham K. Moates
- The Biorefinery Centre, Institute of Food Research, Norwich Research Park, Colney, Norwich, NR4 7UA UK
| | - Samuel R. A. Collins
- The Biorefinery Centre, Institute of Food Research, Norwich Research Park, Colney, Norwich, NR4 7UA UK
| | - Adam Elliston
- The Biorefinery Centre, Institute of Food Research, Norwich Research Park, Colney, Norwich, NR4 7UA UK
| | - Keith W. Waldron
- The Biorefinery Centre, Institute of Food Research, Norwich Research Park, Colney, Norwich, NR4 7UA UK
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Simultaneous saccharification and fermentation of xylo-oligosaccharides manufacturing waste residue for l-lactic acid production by Rhizopus oryzae. Biochem Eng J 2015. [DOI: 10.1016/j.bej.2014.11.020] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Cabrera E, Muñoz MJ, Martín R, Caro I, Curbelo C, Díaz AB. Alkaline and alkaline peroxide pretreatments at mild temperature to enhance enzymatic hydrolysis of rice hulls and straw. BIORESOURCE TECHNOLOGY 2014; 167:1-7. [PMID: 24952164 DOI: 10.1016/j.biortech.2014.05.103] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 05/25/2014] [Accepted: 05/27/2014] [Indexed: 05/15/2023]
Abstract
The current study explores alkaline and alkaline peroxide pretreatments in order to achieve a method to improve saccharification of agricultural residues for ethanol production. The effects of reagent concentration and pretreatment time at 30°C and atmospheric pressure on biomass dissolution after the pretreatment and enzymatic hydrolysis of the pretreated biomass were investigated. In fact, although all pretreatments tested improved enzymatic hydrolysis of native residues, the best results were not achieved for the highest biomass loss. The maximum conversions to reducing sugars in the hydrolysis stage of 77.5% and 92.6% were obtained for rice hulls and straw pretreated by alkaline peroxide (4%, 24h) and alkaline (1%, 48 h) methods, respectively. For both pretreated residues, the reduction to more than half the recommended enzyme loading allowed obtaining more than 94% the reducing sugars attained with the recommended dose.
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Affiliation(s)
- Emir Cabrera
- Departamento de Ingeniería Química, Instituto Superior Politécnico José Antonio Echeverría, Cujae, Ave. 114 No. 11901, Marianao 19390, Cuba.
| | - María J Muñoz
- Departamento de Ingeniería Química y Tecnología de Alimentos, Universidad de Cádiz, Campus Río San Pedro, s/n, Puerto Real 11510, Cádiz, Spain
| | - Ricardo Martín
- Departamento de Ingeniería Química y Tecnología de Alimentos, Universidad de Cádiz, Campus Río San Pedro, s/n, Puerto Real 11510, Cádiz, Spain
| | - Ildefonso Caro
- Departamento de Ingeniería Química y Tecnología de Alimentos, Universidad de Cádiz, Campus Río San Pedro, s/n, Puerto Real 11510, Cádiz, Spain
| | - Caridad Curbelo
- Departamento de Ingeniería Química, Instituto Superior Politécnico José Antonio Echeverría, Cujae, Ave. 114 No. 11901, Marianao 19390, Cuba
| | - Ana B Díaz
- Departamento de Ingeniería Química y Tecnología de Alimentos, Universidad de Cádiz, Campus Río San Pedro, s/n, Puerto Real 11510, Cádiz, Spain
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Shi W, Liu C, Shu Y, Feng C, Lei Z, Zhang Z. Synergistic effect of rice husk addition on hydrothermal treatment of sewage sludge: fate and environmental risk of heavy metals. BIORESOURCE TECHNOLOGY 2013; 149:496-502. [PMID: 24140855 DOI: 10.1016/j.biortech.2013.09.114] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 09/21/2013] [Accepted: 09/25/2013] [Indexed: 06/02/2023]
Abstract
Hydrothermal treatment (HTT) at 200°C was applied to immobilize heavy metals (HMs) and the effect of rice husk (RH) addition was investigated based on total HMs concentration, fractionation and leaching tests. The results indicated that a synergistic effect of RH addition and HTT could be achieved on reducing the risk of HMs from medium and low risk to no risk. Metals were redistributed and transformed from weakly bounded state to stable state during the HTT process under RH addition. Notably at a RH/sludge ratio of 1/1.75 (d.w.), all the HMs showed no eco-toxicity and no leaching toxicity, with the concentrations of leachable Cr, Ni, Cu and Cd decreased by 17%, 89%, 95% and 93%, respectively. This synergistic effect of RH addition and HTT on the risk reduction of HMs implies that HTT process with RH addition could be a promising and safe disposal technology for sewage sludge treatment in practice.
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Affiliation(s)
- Wansheng Shi
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba 305-8572, Japan; School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China
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Carvalho AFA, Neto PDO, da Silva DF, Pastore GM. Xylo-oligosaccharides from lignocellulosic materials: Chemical structure, health benefits and production by chemical and enzymatic hydrolysis. Food Res Int 2013. [DOI: 10.1016/j.foodres.2012.11.021] [Citation(s) in RCA: 167] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Combination of wet disk milling and hydrogen peroxide treatments for enhancing saccharification of sugarcane bagasse. Biochem Eng J 2012. [DOI: 10.1016/j.bej.2012.07.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Alonso JL, Domínguez H, Garrote G, González-Muñoz M, Gullón B, Moure A, Santos V, Vila C, Yáñez R. Biorefinery processes for the integral valorization of agroindustrial and forestal wastes Procesos de biorrefinería para la valorización integral de residuos agroindustriales y forestales. CYTA - JOURNAL OF FOOD 2011. [DOI: 10.1080/19476337.2011.598949] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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A study on the enzymatic hydrolysis of steam exploded napiergrass with alkaline treatment using artificial neural networks and regression analysis. J Taiwan Inst Chem Eng 2011. [DOI: 10.1016/j.jtice.2011.04.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Gullón B, Yáñez R, Alonso JL, Parajó JC. Production of oligosaccharides and sugars from rye straw: a kinetic approach. BIORESOURCE TECHNOLOGY 2010; 101:6676-84. [PMID: 20400295 DOI: 10.1016/j.biortech.2010.03.080] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2010] [Revised: 03/15/2010] [Accepted: 03/19/2010] [Indexed: 05/03/2023]
Abstract
Following the biorefinery philosophy, the non-isothermal autohydrolysis of rye straw (an agroindustrial byproduct) was carried out to obtain liquors containing substituted xylooligosaccharides and solids enriched in cellulose (suitable as substrates for further enzymatic hydrolysis). The effects of temperature (in the range 185-220 degrees C) on the composition of solids and liquid phases were evaluated, and kinetic models were developed. When operation was carried out at 208 degrees C, 69.2% of the initial xylan was converted into xylooligosaccharides, leading to reaction liquors containing up to 22.4 g oligosaccharides/L. The effects of treatments on the DP of the target products and on their substituents were also measured. At 208 degrees C, the percentages of XOS having DP2-4, DP5-6 and DP>6 were 24.8%, 22.4% and 54.8%, respectively. Under selected conditions, the molar ratio Xyl:Ac:UA of the oligomers was 10:1.54:0.50. Finally, when the solid was subjected to enzymatic hydrolysis, 70.6% of cellulose and 63.8% of xylan were saccharified after 48 h.
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Affiliation(s)
- B Gullón
- Department of Chemical Engineering, Faculty of Science, University of Vigo (Campus Ourense), As Lagoas, 32004 Ourense, Spain
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Yáñez R, Garrote G, Díaz MJ. Valorisation of a leguminous species, Sesbania grandiflora, by means of hydrothermal fractionation. BIORESOURCE TECHNOLOGY 2009; 100:6514-6523. [PMID: 19660941 DOI: 10.1016/j.biortech.2009.06.099] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2009] [Revised: 06/25/2009] [Accepted: 06/25/2009] [Indexed: 05/28/2023]
Abstract
For the purpose of hydrolysing hemicelluloses to oligomers and monomers, Sesbania grandiflora samples were subjected to isothermal autohydrolysis in the temperatures ranging from 145 degrees C to 190 degrees C, using a solid to liquid ratio of 8 and reaction times up to 7.5 h. Kinetic models based on sequential pseudo-homogeneous first order Kinetics with Arrhenius type temperature dependence were employed for describing the time course of the main hemicelluloses compounds and their degradation products. The hydrothermal treatment results show that Sesbania grandiflora can be employed as an alternative raw material for the production of XOS leading to high concentrations of XOS (14.1 g/L in the experiment carried out at 190 degrees C and 0.1 h) and xylan to XOS conversion (62.6% in the experiment carried out at 190 degrees C and 6 min). The model proposed provides a satisfactory interpretation of the experimental data obtained in the hydrothermal treatments of this study.
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Affiliation(s)
- Remedios Yáñez
- Department of Chemical Engineering, Faculty of Science, University of Vigo (Campus Ourense), As Lagoas, 32004 Ourense, Spain.
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Yáñez R, Romaní A, Garrote G, Alonso JL, Parajó JC. Processing of Acacia dealbata in Aqueous Media: First Step of a Wood Biorefinery. Ind Eng Chem Res 2009. [DOI: 10.1021/ie900233x] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Remedios Yáñez
- Department of Chemical Engineering, Faculty of Science, Campus de Ourense, University of Vigo, 32004, Ourense, Spain, and CITI (Centro de Investigación, Transferencia e Innovación), University of Vigo, Tecnopole, San Cibrao das Viñas, Ourense, Spain
| | - Aloia Romaní
- Department of Chemical Engineering, Faculty of Science, Campus de Ourense, University of Vigo, 32004, Ourense, Spain, and CITI (Centro de Investigación, Transferencia e Innovación), University of Vigo, Tecnopole, San Cibrao das Viñas, Ourense, Spain
| | - Gil Garrote
- Department of Chemical Engineering, Faculty of Science, Campus de Ourense, University of Vigo, 32004, Ourense, Spain, and CITI (Centro de Investigación, Transferencia e Innovación), University of Vigo, Tecnopole, San Cibrao das Viñas, Ourense, Spain
| | - José Luis Alonso
- Department of Chemical Engineering, Faculty of Science, Campus de Ourense, University of Vigo, 32004, Ourense, Spain, and CITI (Centro de Investigación, Transferencia e Innovación), University of Vigo, Tecnopole, San Cibrao das Viñas, Ourense, Spain
| | - Juan Carlos Parajó
- Department of Chemical Engineering, Faculty of Science, Campus de Ourense, University of Vigo, 32004, Ourense, Spain, and CITI (Centro de Investigación, Transferencia e Innovación), University of Vigo, Tecnopole, San Cibrao das Viñas, Ourense, Spain
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Effect of hemicellulose and lignin on enzymatic hydrolysis of cellulose from brewer's spent grain. Enzyme Microb Technol 2008. [DOI: 10.1016/j.enzmictec.2007.11.006] [Citation(s) in RCA: 243] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Romaní A, Yáñez R, Garrote G, Alonso JL. SSF production of lactic acid from cellulosic biosludges. BIORESOURCE TECHNOLOGY 2008; 99:4247-4254. [PMID: 17928224 DOI: 10.1016/j.biortech.2007.08.051] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2007] [Revised: 06/11/2007] [Accepted: 08/25/2007] [Indexed: 05/25/2023]
Abstract
The use of cellulosic biosludges generated in a Kraft pulp mill was investigated as substrate for lactic acid production by simultaneous saccharification and fermentation (SSF). The effect of the operation mode (batch or fedbatch), the initial liquid to solid ratio (12 or 30 g/g) and the nutrient supplementation (MRS components or none) on several parameters including lactic acid concentration, volumetric productivity and product yields, were evaluated. When the operation was carried out in fedbatch mode with nutrient supplementation and using a LSR(0)=12 g/g, a broth containing 42 g/L was obtained after 48 h with a volumetric productivity of 0.87 g/L h and a product yield of 37.8 g lactic acid/100 g biosludges. In a similar experiment carried out without nutrient supplementation, a lactic acid concentration of 39.4 g/L was obtained after 48 h with a volumetric productivity of 0.82 g/L h and a product yield of 35.5 g L-lactic acid/100 g biosludges.
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Affiliation(s)
- Aloia Romaní
- Department of Chemical Engineering, Faculty of Science, University of Vigo (Campus Ourense), As Lagoas, 32004 Ourense, Spain
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Peng X, Chen H. Single cell oil production in solid-state fermentation by Microsphaeropsis sp. from steam-exploded wheat straw mixed with wheat bran. BIORESOURCE TECHNOLOGY 2008; 99:3885-9. [PMID: 17889521 DOI: 10.1016/j.biortech.2007.08.015] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2007] [Revised: 08/05/2007] [Accepted: 08/06/2007] [Indexed: 05/14/2023]
Abstract
Microsphaeropsis sp. was used to produce SCO in solid-state fermentation (SSF) from a substrate consisting of steam-exploded wheat straw (SEWS) and wheat bran (WB). The yield of SCO was 42 mg/g dry substrate (gds) without adding cellulase. To achieve a higher SCO yield, cellulase was added to the solid-state medium, resulting in an increase of SCO from 42 to 74 mg/gds with a cellulase loading of 10 FPU/gds. Other SSF parameters such as ratio of SEWS to WB of the dry substrate, initial moisture content, and incubation temperature were optimized under the condition of cellulase loading of 10 FPU/gds. So optimized, the SCO yield was 80 mg/gds, and the SCO content of the dry fermented mass was 10.2%. This research explored a novel method to produce SCO from the abundant and cheap agricultural residues - wheat straw and wheat bran.
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Affiliation(s)
- Xiaowei Peng
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, PR China
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Gullón B, Yáñez R, Alonso JL, Parajó JC. L-lactic acid production from apple pomace by sequential hydrolysis and fermentation. BIORESOURCE TECHNOLOGY 2008; 99:308-19. [PMID: 17321133 DOI: 10.1016/j.biortech.2006.12.018] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2006] [Revised: 12/12/2006] [Accepted: 12/17/2006] [Indexed: 05/14/2023]
Abstract
The potential of apple pomace (a solid waste from cider and apple juice making factories) as a source of sugars and other compounds for fermentation was evaluated. The effect of the cellulase-to-solid ratio (CSR) and the liquor-to-solid ratio (LSR) on the kinetics of glucose and total monosaccharide generation was studied. Mathematical models suitable for reproducing and predicting the hydrolyzate composition were developed. When samples of apple pomace were subjected to enzymatic hydrolysis, the glucose and fructose present in the raw material as free monosaccharides were extracted at the beginning of the process. Using low cellulase and cellobiase charges (8.5 FPU/g-solid and 8.5 IU/g-solid, respectively), 79% of total glucan was saccharified after 12 h, leading to solutions containing up to 43.8 g monosaccharides/L (glucose, 22.8 g/L; fructose, 14.8 g/L; xylose+mannose+galactose, 2.5 g/L; arabinose+rhamnose, 2.8g/L). These results correspond to a monosaccharide/cellulase ratio of 0.06 g/FPU and to a volumetric productivity of 3.65 g of monosaccharides/L h. Liquors obtained under these conditions were used for fermentative lactic acid production with Lactobacillus rhamnosus CECT-288, leading to media containing up to 32.5 g/L of L-lactic acid after 6 h (volumetric productivity=5.41 g/L h, product yield=0.88 g/g).
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Affiliation(s)
- Beatriz Gullón
- Department of Chemical Engineering, Faculty of Science, University of Vigo (Campus Ourense), As Lagoas, 32004, Ourense, Spain
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Cara C, Moya M, Ballesteros I, Negro MJ, González A, Ruiz E. Influence of solid loading on enzymatic hydrolysis of steam exploded or liquid hot water pretreated olive tree biomass. Process Biochem 2007. [DOI: 10.1016/j.procbio.2007.03.012] [Citation(s) in RCA: 126] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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