1
|
Namboodiri MMT, Manikandan A, Paul T, Pakshirajan K, Pugazhenthi G. Chitosan production by Penicillium citrinum using paper mill wastewater and rice straw hydrolysate as low-cost substrates in a continuous stirred tank reactor. ENVIRONMENTAL TECHNOLOGY 2023; 44:2254-2269. [PMID: 34994298 DOI: 10.1080/09593330.2022.2026486] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 12/15/2021] [Indexed: 06/04/2023]
Abstract
In this study, paper mill wastewater and hemicellulose hydrolysate were evaluated as low-cost substrates for fungal chitosan production using Penicillium citrinum. Submerged fermentation was first studied using a bioreactor operated under batch, fed-batch and continuous modes with paper mill wastewater as the substrate. Very high removal (91%) of organics as chemical oxygen demand (COD) in the wastewater with 160 mg L-1 chitosan production by P. citrinum was obtained using the bioreactor operated under fed-batch mode for 72 h. Moreover, 86% reduction of phenolics in the wastewater with 89% decolourization efficiency was achieved in the fed-batch experiments with the bioreactor. Under the continuous mode of operation with the bioreactor, maximum chitosan production of 170 mg L-1 was observed. The effect of acetic acid addition to the wastewater for enhancing chitosan production by the fungus was further studied in a batch system. Chitosan productivity of 2.33 mg L-1 h-1 was obtained with 50 mg/L acetic acid. Various models, viz. Monod, Haldane, Andrews, Webb and Yano, were fitted to the experimental data for understanding the kinetics involved in the process. Haldane model accurately fitted the experimental data on biomass specific growth rate, acetic acid consumption rate and chitosan production rate by P. citrinum with acetic acid addition to the wastewater. Fungal fermentation of another low-cost substrate, rice straw hydrolysate, was further studied using the batch-operated bioreactor; and a maximum chitosan titre of 911 mg L-1 was achieved using the detoxified rice straw hydrolysate.Highlights Low-cost substrates for chitosan production by Penicillium citrinum are reportedAcetic acid addition to paper mill wastewater enhances chitosan productionBiomass growth and chitosan production follow substrate inhibition kineticsFed-batch -operated bioreactor resulted in 91% wastewater treatment efficiencyMaximum chitosan titre of 911 mg L-1 was achieved with rice straw hydrolysate.
Collapse
Affiliation(s)
- M M T Namboodiri
- Department of Biosciences and Bioengineering, Indian Institute Technology Guwahati, Guwahati, India
| | - Arul Manikandan
- Department of Chemical Engineering, Indian Institute Technology Guwahati, Guwahati, India
| | - Tanushree Paul
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati, India
| | - Kannan Pakshirajan
- Department of Biosciences and Bioengineering, Indian Institute Technology Guwahati, Guwahati, India
| | - G Pugazhenthi
- Department of Chemical Engineering, Indian Institute Technology Guwahati, Guwahati, India
| |
Collapse
|
2
|
He C, Zhang X, Zhang Z, Wang C, Wang D, Wei G. Whole-crop biorefinery of corn biomass for pullulan production by Aureobasidium pullulans. BIORESOURCE TECHNOLOGY 2023; 370:128517. [PMID: 36565822 DOI: 10.1016/j.biortech.2022.128517] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 12/16/2022] [Accepted: 12/17/2022] [Indexed: 06/17/2023]
Abstract
In the present study, corn starch, cob, and straw were biorefined and used as feedstocks for the production of pullulan. The titer and molecular weight (Mw) of pullulan significantly decreased when corn cob and straw hydrolysates were utilized by the parental strain Aureobasidium pullulans CCTCC M 2012259 (PS). Based on adaptive laboratory evolution of PS, an evolved strain A. pullulans EV6 with strong adaptability to the whole corn biomass hydrolysate and high capability of pullulan biosynthesis was screened. Batch pullulan fermentation results indicated that EV6 produced an increased titer of pullulan with a higher Mw than PS. The underlying reasons for these increases were revealed by assaying key enzymes activities and measuring intracellular uridine diphosphate glucose levels. Subsequently, whole-crop biorefinery of corn biomass was conducted, and the results confirmed that whole corn crop has immense potential for efficient pullulan production.
Collapse
Affiliation(s)
- Chaoyong He
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China
| | - Xuehan Zhang
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China
| | - Zhen Zhang
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China
| | - Chonglong Wang
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China
| | - Dahui Wang
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China
| | - Gongyuan Wei
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China.
| |
Collapse
|
3
|
Wang J, Huang J, Xiao X, Zhang D, Zhang Z, Zhou Z, Liu S. (R)−3-hydroxybutyrate production by Burkholderia cepacia in the cathode chamber of ethanol-producing microbial fuel cells. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
|
4
|
Ruchala J, Sibirny AA. Pentose metabolism and conversion to biofuels and high-value chemicals in yeasts. FEMS Microbiol Rev 2020; 45:6034013. [PMID: 33316044 DOI: 10.1093/femsre/fuaa069] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 12/09/2020] [Indexed: 12/15/2022] Open
Abstract
Pentose sugars are widespread in nature and two of them, D-xylose and L-arabinose belong to the most abundant sugars being the second and third by abundance sugars in dry plant biomass (lignocellulose) and in general on planet. Therefore, it is not surprising that metabolism and bioconversion of these pentoses attract much attention. Several different pathways of D-xylose and L-arabinose catabolism in bacteria and yeasts are known. There are even more common and really ubiquitous though not so abundant pentoses, D-ribose and 2-deoxy-D-ribose, the constituents of all living cells. Thus, ribose metabolism is example of endogenous metabolism whereas metabolism of other pentoses, including xylose and L-arabinose, represents examples of the metabolism of foreign exogenous compounds which normally are not constituents of yeast cells. As a rule, pentose degradation by the wild-type strains of microorganisms does not lead to accumulation of high amounts of valuable substances; however, productive strains have been obtained by random selection and metabolic engineering. There are numerous reviews on xylose and (less) L-arabinose metabolism and conversion to high value substances; however, they mostly are devoted to bacteria or the yeast Saccharomyces cerevisiae. This review is devoted to reviewing pentose metabolism and bioconversion mostly in non-conventional yeasts, which naturally metabolize xylose. Pentose metabolism in the recombinant strains of S. cerevisiae is also considered for comparison. The available data on ribose, xylose, L-arabinose transport, metabolism, regulation of these processes, interaction with glucose catabolism and construction of the productive strains of high-value chemicals or pentose (ribose) itself are described. In addition, genome studies of the natural xylose metabolizing yeasts and available tools for their molecular research are reviewed. Metabolism of other pentoses (2-deoxyribose, D-arabinose, lyxose) is briefly reviewed.
Collapse
Affiliation(s)
- Justyna Ruchala
- Department of Microbiology and Molecular Genetics, University of Rzeszow, Zelwerowicza 4, Rzeszow 35-601, Poland.,Department of Molecular Genetics and Biotechnology, Institute of Cell Biology NAS of Ukraine, Drahomanov Street, 14/16, Lviv 79005, Ukraine
| | - Andriy A Sibirny
- Department of Microbiology and Molecular Genetics, University of Rzeszow, Zelwerowicza 4, Rzeszow 35-601, Poland.,Department of Molecular Genetics and Biotechnology, Institute of Cell Biology NAS of Ukraine, Drahomanov Street, 14/16, Lviv 79005, Ukraine
| |
Collapse
|
5
|
Sharma S, Arora A. Tracking strategic developments for conferring xylose utilization/fermentation by Saccharomyces cerevisiae. ANN MICROBIOL 2020. [DOI: 10.1186/s13213-020-01590-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Abstract
Purpose
Efficient ethanol production through lignocellulosic biomass hydrolysates could solve energy crisis as it is economically sustainable and ecofriendly. Saccharomyces cerevisiae is the work horse for lignocellulosic bioethanol production at industrial level. But its inability to ferment and utilize xylose limits the overall efficacy of the process.
Method
Data for the review was selected using different sources, such as Biofuels digest, Statista, International energy agency (IEA). Google scholar was used as a search engine to search literature for yeast metabolic engineering approaches. Keywords used were metabolic engineering of yeast for bioethanol production from lignocellulosic biomass.
Result
Through these approaches, interconnected pathways can be targeted randomly. Moreover, the improved strains genetic makeup can help us understand the mechanisms involved for this purpose.
Conclusion
This review discusses all possible approaches for metabolic engineering of yeast. These approaches may reveal unknown hidden mechanisms and construct ways for the researchers to produce novel and modified strains.
Collapse
|
6
|
Fernandes ÉS, Bueno D, Pagnocca FC, Brienzo M. Minor Biomass Particle Size for an Efficient Cellulose Accessibility and Enzymatic Hydrolysis. ChemistrySelect 2020. [DOI: 10.1002/slct.202001008] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Érika S. Fernandes
- São Paulo State University (UNESP) Institute for Research in Bioenergy (IPBEN) Rio Claro-SP 13500-230 Brazil
| | - Danilo Bueno
- São Paulo State University (UNESP) Institute for Research in Bioenergy (IPBEN) Rio Claro-SP 13500-230 Brazil
| | - Fernando C. Pagnocca
- São Paulo State University (UNESP) Center for the Study of Social Insects (CEIS) Rio Claro, SP 13500-230 Brazil
| | - Michel Brienzo
- São Paulo State University (UNESP) Institute for Research in Bioenergy (IPBEN) Rio Claro-SP 13500-230 Brazil
| |
Collapse
|
7
|
Phung TK, Pham TLM, Nguyen ANT, Vu KB, Giang HN, Nguyen TA, Huynh TC, Pham HD. Effect of Supports and Promoters on the Performance of Ni‐Based Catalysts in Ethanol Steam Reforming. Chem Eng Technol 2020. [DOI: 10.1002/ceat.201900445] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Thanh Khoa Phung
- International UniversitySchool of Biotechnology Ho Chi Minh City Vietnam
- Vietnam National University Ho Chi Minh City Vietnam
| | - Thong Le Minh Pham
- Duy Tan UniversityInstitute of Research and Development 550000 Da Nang City Vietnam
| | - Anh-Nga T. Nguyen
- Ton Duc Thang UniversityBiomaterials and Nanotechnology Research Group, Faculty of Applied Sciences Ho Chi Minh City Vietnam
| | - Khanh B. Vu
- International UniversitySchool of Biotechnology Ho Chi Minh City Vietnam
- Vietnam National University Ho Chi Minh City Vietnam
| | - Ha Ngoc Giang
- Ho Chi Minh City University of Food IndustryDepartment of Chemical Engineering 140 Le Trong Tan Street, Tay Thanh Ward, Tan Binh District Ho Chi Minh City Vietnam
| | - Tuan-Anh Nguyen
- Ho Chi Minh City University of TechnologyFaculty of Chemical Engineering VNU-HCM, 268 Ly Thuong Kiet Ho Chi Minh City Vietnam
| | - Thanh Cong Huynh
- Institute of Applied Material ScienceOrganic Material Department Ho Chi Minh City Vietnam
| | - Hong Duc Pham
- Queensland University of Technology (QUT)Institute of Future Environment, School of Chemistry, Physics and Mechanical Engineering 2 George Street Brisbane Australia
| |
Collapse
|
8
|
Tobin T, Gustafson R, Bura R, Gough HL. Integration of wastewater treatment into process design of lignocellulosic biorefineries for improved economic viability. BIOTECHNOLOGY FOR BIOFUELS 2020; 13:24. [PMID: 32025241 PMCID: PMC6998191 DOI: 10.1186/s13068-020-1657-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 01/16/2020] [Indexed: 06/02/2023]
Abstract
BACKGROUND Production and use of bio-based products offer advantages over conventional petrochemicals, yet the relatively high cost of production has restricted their mainstream adoption. Optimization of wastewater treatment processes could reduce capital expenditures, lowering the barrier to market entry for lignocellulosic biorefineries. This paper characterizes wastewater associated with lignocellulosic ethanol production and evaluates potential wastewater treatment operations. RESULTS It is found that organic material is intrinsic to bioconversion wastewater, representing up to 260 kg of biological oxygen demand per tonne of feedstock processed. Inorganics in the wastewater largely originate from additions during pretreatment and pH adjustments, which increase the inorganic loading by 44 kg per tonne of feedstock processed. Adjusting the ethanol production process to decrease addition of inorganic material could reduce the demands and therefore cost of waste treatment. Various waste treatment technologies-including those that take advantage of ecosystem services provided by feedstock production-were compared in terms of capital and operating costs, as well as technical feasibility. CONCLUSIONS It is concluded that wastewater treatment technologies should be better integrated with conversion process design and feedstock production. Efforts to recycle resources throughout the biofuel supply chain through application of ecosystem services provided by adjacent feedstock plantations and recovery of resources from the waste stream to reduce overall capital and operating costs of bioconversion facilities.
Collapse
Affiliation(s)
- Tyler Tobin
- The School of Environmental and Forest Sciences, University of Washington, 4000 15th Avenue NE, Seattle, WA 98195-2100 USA
| | - Rick Gustafson
- The School of Environmental and Forest Sciences, University of Washington, 4000 15th Avenue NE, Seattle, WA 98195-2100 USA
| | - Renata Bura
- The School of Environmental and Forest Sciences, University of Washington, 4000 15th Avenue NE, Seattle, WA 98195-2100 USA
| | - Heidi L. Gough
- The School of Environmental and Forest Sciences, University of Washington, 4000 15th Avenue NE, Seattle, WA 98195-2100 USA
| |
Collapse
|
9
|
Ruchala J, Kurylenko OO, Dmytruk KV, Sibirny AA. Construction of advanced producers of first- and second-generation ethanol in Saccharomyces cerevisiae and selected species of non-conventional yeasts (Scheffersomyces stipitis, Ogataea polymorpha). J Ind Microbiol Biotechnol 2019; 47:109-132. [PMID: 31637550 PMCID: PMC6970964 DOI: 10.1007/s10295-019-02242-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 10/01/2019] [Indexed: 12/20/2022]
Abstract
This review summarizes progress in the construction of efficient yeast ethanol producers from glucose/sucrose and lignocellulose. Saccharomyces cerevisiae is the major industrial producer of first-generation ethanol. The different approaches to increase ethanol yield and productivity from glucose in S. cerevisiae are described. Construction of the producers of second-generation ethanol is described for S. cerevisiae, one of the best natural xylose fermenters, Scheffersomyces stipitis and the most thermotolerant yeast known Ogataea polymorpha. Each of these organisms has some advantages and drawbacks. S. cerevisiae is the primary industrial ethanol producer and is the most ethanol tolerant natural yeast known and, however, cannot metabolize xylose. S. stipitis can effectively ferment both glucose and xylose and, however, has low ethanol tolerance and requires oxygen for growth. O. polymorpha grows and ferments at high temperatures and, however, produces very low amounts of ethanol from xylose. Review describes how the mentioned drawbacks could be overcome.
Collapse
Affiliation(s)
- Justyna Ruchala
- Department of Microbiology and Biotechnology, University of Rzeszow, Zelwerowicza 4, 35-601, Rzeszow, Poland
| | - Olena O Kurylenko
- Department of Molecular Genetics and Biotechnology, Institute of Cell Biology, NAS of Ukraine, Drahomanov Street, 14/16, Lviv, 79005, Ukraine
| | - Kostyantyn V Dmytruk
- Department of Molecular Genetics and Biotechnology, Institute of Cell Biology, NAS of Ukraine, Drahomanov Street, 14/16, Lviv, 79005, Ukraine
| | - Andriy A Sibirny
- Department of Microbiology and Biotechnology, University of Rzeszow, Zelwerowicza 4, 35-601, Rzeszow, Poland.
| |
Collapse
|
10
|
Prasad S, Malav MK, Kumar S, Singh A, Pant D, Radhakrishnan S. Enhancement of bio-ethanol production potential of wheat straw by reducing furfural and 5-hydroxymethylfurfural (HMF). ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.biteb.2018.09.007] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
11
|
Kim M, Kim BC, Choi Y, Nam K. Minimizing mixing intensity to improve the performance of rice straw anaerobic digestion via enhanced development of microbe-substrate aggregates. BIORESOURCE TECHNOLOGY 2017; 245:590-597. [PMID: 28910646 DOI: 10.1016/j.biortech.2017.09.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 08/31/2017] [Accepted: 09/01/2017] [Indexed: 06/07/2023]
Abstract
The aim of this work was to study the effect of the differential development of microbe-substrate aggregates at different mixing intensities on the performance of anaerobic digestion of rice straw. Batch and semi-continuous reactors were operated for up to 50 and 300days, respectively, under different mixing intensities. In both batch and semi-continuous reactors, minimal mixing conditions exhibited maximum methane production and lignocellulose biodegradability, which both had strong correlations with the development of microbe-substrate aggregates. The results implied that the aggregated microorganisms on the particulate substrate played a key role in rice straw hydrolysis, determining the performance of anaerobic digestion. Increasing the mixing speed from 50 to 150rpm significantly reduced the methane production rate by disintegrating the microbe-substrate aggregates in the semi-continuous reactor. A temporary stress of high-speed mixing fundamentally affected the microbial communities, increasing the possibility of chronic reactor failure.
Collapse
Affiliation(s)
- Moonkyung Kim
- Department of Civil and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Byung-Chul Kim
- Department of Civil and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Yongju Choi
- Department of Civil and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Kyoungphile Nam
- Department of Civil and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea.
| |
Collapse
|
12
|
Yeast diversity in relation to the production of fuels and chemicals. Sci Rep 2017; 7:14259. [PMID: 29079838 PMCID: PMC5660169 DOI: 10.1038/s41598-017-14641-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 10/09/2017] [Indexed: 12/27/2022] Open
Abstract
In addition to ethanol, yeasts have the potential to produce many other industrially-relevant chemicals from numerous different carbon sources. However there remains a paucity of information about overall capability across the yeast family tree. Here, 11 diverse species of yeasts with genetic backgrounds representative of different branches of the family tree were investigated. They were compared for their abilities to grow on a range of sugar carbon sources, to produce potential platform chemicals from such substrates and to ferment hydrothermally pretreated rice straw under simultaneous saccharification and fermentation conditions. The yeasts differed considerably in their metabolic capabilities and production of ethanol. A number could produce significant amounts of ethyl acetate, arabinitol, glycerol and acetate in addition to ethanol, including from hitherto unreported carbon sources. They also demonstrated widely differing efficiencies in the fermentation of sugars derived from pre-treated rice straw biomass and differential sensitivities to fermentation inhibitors. A new catabolic property of Rhodotorula mucilaginosa (NCYC 65) was discovered in which sugar substrate is cleaved but the products are not metabolised. We propose that engineering this and some of the other properties discovered in this study and transferring such properties to conventional industrial yeast strains could greatly expand their biotechnological utility.
Collapse
|
13
|
Wickramasinghe GHIM, Rathnayake PPAMSI, Chandrasekharan NV, Weerasinghe MSS, Wijesundera RLC, Wijesundera WSS. Expression, Docking, and Molecular Dynamics of Endo- β-1,4-xylanase I Gene of Trichoderma virens in Pichia stipitis. BIOMED RESEARCH INTERNATIONAL 2017; 2017:4658584. [PMID: 28856159 PMCID: PMC5569632 DOI: 10.1155/2017/4658584] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 06/19/2017] [Indexed: 11/18/2022]
Abstract
It is essential that major carbohydrate polymers in the lignocellulosic biomass are converted into fermentable sugars for the economical production of energy. Xylan, the major component of hemicelluloses, is the second most naturally abundant carbohydrate polymer comprising 20-40% of the total biomass. Endoxylanase (EXN) hydrolyzes xylan into mixtures of xylooligosaccharides. The objective of this study was to genetically modify Pichia stipitis, a pentose sugar fermenting yeast species, to hydrolyze xylan into xylooligosaccharides via cloning and heterologous extracellular expression of EXNI gene from locally isolated Trichoderma virens species. Pichia stipitis was engineered to carry the EXNI gene of T. virens using pGAPZα expression vector. The open reading frame encodes 191 amino acids and SDS-PAGE analysis revealed a 24 kDA recombinant protein. The EXNI activity expressed by recombinant P. stipitis clone under standard conditions using 1% beechwood xylan was 31.7 U/ml. Molecular docking and molecular dynamics simulations were performed to investigate EXNI-xylan interactions. Free EXNI and xylan bound EXNI exhibited similar stabilities and structural behavior in aqueous medium. Furthermore, this in silico work opens avenues for the development of newer generation EXN proteins that can perform better and have enhanced catalytic activity.
Collapse
|
14
|
Development of dilute sulfuric acid pretreatment method for the enhancement of xylose fermentability. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2017. [DOI: 10.1016/j.bcab.2017.07.012] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
15
|
Deshavath NN, Mohan M, Veeranki VD, Goud VV, Pinnamaneni SR, Benarjee T. Dilute acid pretreatment of sorghum biomass to maximize the hemicellulose hydrolysis with minimized levels of fermentative inhibitors for bioethanol production. 3 Biotech 2017; 7:139. [PMID: 28593523 PMCID: PMC5462656 DOI: 10.1007/s13205-017-0752-3] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 01/23/2017] [Indexed: 11/29/2022] Open
Abstract
Conversion of lignocellulosic biomass into monomeric carbohydrates is economically beneficial and suitable for sustainable production of biofuels. Hydrolysis of lignocellulosic biomass using high acid concentration results in decomposition of sugars into fermentative inhibitors. Thus, the main aim of this work was to investigate the optimum hydrolysis conditions for sorghum brown midrib IS11861 biomass to maximize the pentose sugars yield with minimized levels of fermentative inhibitors at low acid concentrations. Process parameters investigated include sulfuric acid concentration (0.2-1 M), reaction time (30-120 min) and temperature (80-121 °C). At the optimum condition (0.2 M sulfuric acid, 121 °C and 120 min), 97.6% of hemicellulose was converted into xylobiose (18.02 mg/g), xylose (225.2 mg/g), arabinose (20.2 mg/g) with low concentration of furfural (4.6 mg/g). Furthermore, the process parameters were statistically optimized using response surface methodology based on central composite design. Due to the presence of low concentration of fermentative inhibitors, 78.6 and 82.8% of theoretical ethanol yield were attained during the fermentation of non-detoxified and detoxified hydrolyzates, respectively, using Pichia stipitis 3498 wild strain, in a techno-economical way.
Collapse
Affiliation(s)
- Narendra Naik Deshavath
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India
| | - Mood Mohan
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India
| | - Venkata Dasu Veeranki
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India.
- Department of Bioscience and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India.
| | - Vaibhav V Goud
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India.
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India.
| | | | - Tamal Benarjee
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India
| |
Collapse
|
16
|
Li H, Xiong L, Chen X, Wang C, Qi G, Huang C, Luo M, Chen X. Enhanced enzymatic hydrolysis and acetone-butanol-ethanol fermentation of sugarcane bagasse by combined diluted acid with oxidate ammonolysis pretreatment. BIORESOURCE TECHNOLOGY 2017; 228:257-263. [PMID: 28081523 DOI: 10.1016/j.biortech.2016.12.119] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 12/30/2016] [Accepted: 12/31/2016] [Indexed: 05/24/2023]
Abstract
This study aims to propose a biorefinery pretreatment technology for the bioconversion of sugarcane bagasse (SB) into biofuels and N-fertilizers. Performance of diluted acid (DA), aqueous ammonia (AA), oxidate ammonolysis (OA) and the combined DA with AA or OA were compared in SB pretreatment by enzymatic hydrolysis, structural characterization and acetone-butanol-ethanol (ABE) fermentation. Results indicated that DA-OA pretreatment improves the digestibility of SB by sufficiently hydrolyzing hemicellulose into fermentable monosaccharides and oxidating lignin into soluble N-fertilizer with high nitrogen content (11.25%) and low C/N ratio (3.39). The enzymatic hydrolysates from DA-OA pretreated SB mainly composed of glucose was more suitable for the production of ABE solvents than the enzymatic hydrolysates from OA pretreated SB containing high ratio of xylose. The fermentation of enzymatic hydrolysates from DA-OA pretreated SB produced 12.12g/L ABE in 120h. These results suggested that SB could be utilized efficient, economic, and environmental by DA-OA pretreatment.
Collapse
Affiliation(s)
- Hailong Li
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China; CAS Key Laboratory of Renewable Energy, Guangzhou 510640, People's Republic of China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, People's Republic of China; R&D Center of Xuyi Attapulgite Applied Technology, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Xuyi 211700, People's Republic of China
| | - Lian Xiong
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China; CAS Key Laboratory of Renewable Energy, Guangzhou 510640, People's Republic of China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, People's Republic of China; R&D Center of Xuyi Attapulgite Applied Technology, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Xuyi 211700, People's Republic of China
| | - Xuefang Chen
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China; CAS Key Laboratory of Renewable Energy, Guangzhou 510640, People's Republic of China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, People's Republic of China; R&D Center of Xuyi Attapulgite Applied Technology, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Xuyi 211700, People's Republic of China
| | - Can Wang
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China; CAS Key Laboratory of Renewable Energy, Guangzhou 510640, People's Republic of China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, People's Republic of China; R&D Center of Xuyi Attapulgite Applied Technology, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Xuyi 211700, People's Republic of China
| | - Gaoxiang Qi
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Chao Huang
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China; CAS Key Laboratory of Renewable Energy, Guangzhou 510640, People's Republic of China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, People's Republic of China; R&D Center of Xuyi Attapulgite Applied Technology, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Xuyi 211700, People's Republic of China
| | - Mutan Luo
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Xinde Chen
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China; CAS Key Laboratory of Renewable Energy, Guangzhou 510640, People's Republic of China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, People's Republic of China; R&D Center of Xuyi Attapulgite Applied Technology, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Xuyi 211700, People's Republic of China.
| |
Collapse
|
17
|
Ma K, He M, You H, Pan L, Hu G, Cui Y, Maeda T. Enhanced fuel ethanol production from rice straw hydrolysate by an inhibitor-tolerant mutant strain of Scheffersomyces stipitis. RSC Adv 2017. [DOI: 10.1039/c7ra04049k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel process for bioethanol production from lignocellulosic biomass using an inhibitor-tolerant mutant strain of Scheffersomyces stipitis and cell-recycling continuous fermentation.
Collapse
Affiliation(s)
- Kedong Ma
- College of Environmental and Chemical Engineering
- Dalian University
- Dalian 116622
- PR China
- Key Laboratory of Development and Application of Rural Renewable Energy
| | - Mingxiong He
- Key Laboratory of Development and Application of Rural Renewable Energy
- Ministry of Agriculture
- Biomass Energy Technology Research Centre
- Biogas Institute of Ministry of Agriculture
- Chengdu 610041
| | - Huiyan You
- College of Environmental and Chemical Engineering
- Dalian University
- Dalian 116622
- PR China
| | - Liwei Pan
- College of Environmental and Chemical Engineering
- Dalian University
- Dalian 116622
- PR China
| | - Guoquan Hu
- Key Laboratory of Development and Application of Rural Renewable Energy
- Ministry of Agriculture
- Biomass Energy Technology Research Centre
- Biogas Institute of Ministry of Agriculture
- Chengdu 610041
| | - Yubo Cui
- Department of Environmental Science and Technology
- Dalian Nationalities University
- Dalian 116600
- PR China
| | - Toshinari Maeda
- Department of Biological Functions Engineering
- Graduate School of Life Science and Systems Engineering
- Kyushu Institute of Technology
- Kitakyushu 808-0196
- Japan
| |
Collapse
|
18
|
Optimization of dilute sulfuric acid pretreatment of corn stover for enhanced xylose recovery and xylitol production. BIOTECHNOL BIOPROC E 2016. [DOI: 10.1007/s12257-016-0483-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
19
|
Senatham S, Chamduang T, Kaewchingduang Y, Thammasittirong A, Srisodsuk M, Elliston A, Roberts IN, Waldron KW, Thammasittirong SNR. Enhanced xylose fermentation and hydrolysate inhibitor tolerance of Scheffersomyces shehatae for efficient ethanol production from non-detoxified lignocellulosic hydrolysate. SPRINGERPLUS 2016; 5:1040. [PMID: 27462488 PMCID: PMC4940357 DOI: 10.1186/s40064-016-2713-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Accepted: 06/29/2016] [Indexed: 11/10/2022]
Abstract
Effective conversion of xylose into ethanol is important for lignocellulosic ethanol production. In the present study, UV-C mutagenesis was used to improve the efficiency of xylose fermentation. The mutated Scheffersomyces shehatae strain TTC79 fermented glucose as efficiently and xylose more efficiently, producing a higher ethanol concentration than the wild-type. A maximum ethanol concentration of 29.04 g/L was produced from 71.31 g/L xylose, which was 58.95 % higher than that of the wild-type. This mutant also displayed significantly improved hydrolysate inhibitors tolerance and increased ethanol production from non-detoxified lignocellulosic hydrolysates. The ethanol yield, productivity and theoretical yield by TTC79 from sugarcane bagasse hydrolysate were 0.46 g/g, 0.20 g/L/h and 90.61 %, respectively, while the corresponding values for the wild-type were 0.20 g/g, 0.04 g/L/h and 39.20 %, respectively. These results demonstrate that S. shehatae TTC79 is a useful non-recombinant strain, combining efficient xylose consumption and high inhibitor tolerance, with potential for application in ethanol production from lignocellulose hydrolysates.
Collapse
Affiliation(s)
- Srisuda Senatham
- Department of Microbiology, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, 73140 Thailand
| | - Thada Chamduang
- Department of Microbiology, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, 73140 Thailand
| | - Yotin Kaewchingduang
- Department of Microbiology, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, 73140 Thailand
| | - Anon Thammasittirong
- Department of Microbiology, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, 73140 Thailand ; Microbial Biotechnology Unit, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, 73140 Thailand
| | - Malee Srisodsuk
- Department of Microbiology, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, 73140 Thailand ; Microbial Biotechnology Unit, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, 73140 Thailand
| | - Adam Elliston
- Biorefinery Center, Institute of Food Research, Norwich, NR4 7UA UK
| | - Ian N Roberts
- National Collection of Yeast Cultures, Institute of Food Research, Norwich, NR4 7UA UK
| | - Keith W Waldron
- Biorefinery Center, Institute of Food Research, Norwich, NR4 7UA UK
| | - Sutticha Na-Ranong Thammasittirong
- Department of Microbiology, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, 73140 Thailand ; Microbial Biotechnology Unit, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, 73140 Thailand
| |
Collapse
|
20
|
Genetic Enhancement of Saccharomyces cerevisiae for First and Second Generation Ethanol Production. Ind Biotechnol (New Rochelle N Y) 2016. [DOI: 10.1201/b19347-11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
|
21
|
Gao X, Jiang L, Zhu L, Xu Q, Xu X, Huang H. Tailoring of global transcription sigma D factor by random mutagenesis to improve Escherichia coli tolerance towards low-pHs. J Biotechnol 2016; 224:55-63. [PMID: 26971973 DOI: 10.1016/j.jbiotec.2016.03.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 03/02/2016] [Accepted: 03/08/2016] [Indexed: 11/17/2022]
Abstract
Bioconversion processes of organic acid or acid hydrolysis of raw material for microbial metabolism often suffer limitations as a result of microbial sensitivity in low-pH conditions. We adopted a three-step method called RAndom Insertional-deletional Strand Exchange mutagenesis (RAISE) to engineer the components of global regulator Sigma D factor (RpoD) of Escherichia coli to improve its acid tolerance. The best strain Mutant VII was identified from random mutagenesis libraries based on the growth performance, which exhibited much higher growth rate than the control (0.22h(-1) vs. 0.15h(-1)) at pH as low as 3.17. Combined transcriptome and phenome analysis of E. coli was carried out to better understand the global effects of RpoD on the regulatory networks. Our analysis showed that 95 (2.1%) of all E. coli genes were induced and 178 (4.0%) genes were repressed, including those for trehalose biosynthesis, nucleotides biosynthesis, carbon metabolism, amino acid utilization, except for acid resistance. Also regulated were the master regulators (ArcA, EvgA, H-NS and RpoS) and gene/operon-specific transcription factors (GadX, GadW, AppY, YdeO, KdgR). These results demonstrated that RpoD acts as global regulator in the growth phase of E. coli and consequently improves acid tolerances.
Collapse
Affiliation(s)
- Xi Gao
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, PR China.
| | - Ling Jiang
- College of Food Science and Light Industry, Nanjing Tech University, Nanjing 210009, PR China.
| | - Liying Zhu
- College of Sciences, Nanjing Tech University, Nanjing 210009, PR China.
| | - Qing Xu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, PR China.
| | - Xian Xu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, PR China.
| | - He Huang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, PR China.
| |
Collapse
|
22
|
Terán-Hilares R, Reséndiz AL, Martínez RT, Silva SS, Santos JC. Successive pretreatment and enzymatic saccharification of sugarcane bagasse in a packed bed flow-through column reactor aiming to support biorefineries. BIORESOURCE TECHNOLOGY 2016; 203:42-49. [PMID: 26720138 DOI: 10.1016/j.biortech.2015.12.026] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 12/09/2015] [Accepted: 12/12/2015] [Indexed: 06/05/2023]
Abstract
A packed bed flow-through column reactor (PBFTCR) was used for pretreatment and subsequent enzymatic hydrolysis of sugarcane bagasse (SCB). Alkaline pretreatment was performed at 70 °C for 4h with fresh 0.3M NaOH solution or with liquor recycled from a previous pretreatment batch. Scheffersomyces stipitis NRRL-Y7124 was used for fermentation of sugars released after enzymatic hydrolysis (20 FPU g(-1) of dry SCB). The highest results for lignin removal were 61% and 52%, respectively, observed when using fresh NaOH or the first reuse of the liquor. About 50% of cellulosic and 57% of hemicellulosic fractions of pretreated SCBs were enzymatically hydrolyzed and the maximum ethanol production was 23.4 g L(-1) (ethanol yield of 0.4 gp gs(-1)), with near complete consumption of both pentoses and hexoses present in the hydrolysate during the fermentation. PBFTCR as a new alternative for SCB-biorefineries is presented, mainly considering its simple configuration and efficiency for operating with a high solid:liquid ratio.
Collapse
Affiliation(s)
- R Terán-Hilares
- Departamento de Biotecnologia, Escola de Engenharia de Lorena, Universidade de São Paulo, CEP 12602-810, Lorena, São Paulo, Brazil.
| | - A L Reséndiz
- Escuela Nacional de Ciencias Biológicas (ENCB), Instituto Politécnico Nacional, CP 07738 Distrito Federal, Mexico
| | - R T Martínez
- Unidad Profesional Interdisciplinaria de Biotecnología (UPIBI), Instituto Politécnico Nacional, CP 07738 Distrito Federal, Mexico
| | - S S Silva
- Departamento de Biotecnologia, Escola de Engenharia de Lorena, Universidade de São Paulo, CEP 12602-810, Lorena, São Paulo, Brazil
| | - J C Santos
- Departamento de Biotecnologia, Escola de Engenharia de Lorena, Universidade de São Paulo, CEP 12602-810, Lorena, São Paulo, Brazil
| |
Collapse
|
23
|
Shalley Sharma, Sonia Sharma, Surender Singh, Lata, Anju Arora. Improving Yeast Strains for Pentose Hexose Co-fermentation: Successes and Hurdles. SPRINGER PROCEEDINGS IN ENERGY 2016. [DOI: 10.1007/978-81-322-2773-1_3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
|
24
|
Microbial production of 2,3-butanediol through a two-stage pH and agitation strategy in 150l bioreactor. Biochem Eng J 2016. [DOI: 10.1016/j.bej.2015.09.016] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
25
|
Paixão SM, Ladeira SA, Silva TP, Arez BF, Roseiro JC, Martins MLL, Alves L. Sugarcane bagasse delignification with potassium hydroxide for enhanced enzymatic hydrolysis. RSC Adv 2016. [DOI: 10.1039/c5ra14908h] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Alkali pretreatment of sugarcane bagasse biomass was shown to be effective for producing sugar-rich hydrolysates for biotechnological applications.
Collapse
Affiliation(s)
- S. M. Paixão
- LNEG – Laboratório Nacional de Energia e Geologia, IP
- Unidade de Bioenergia
- 1649-038 Lisboa
- Portugal
| | - S. A. Ladeira
- UENF – Universidade Estadual do Norte Fluminense Darcy Ribeiro
- LTA-CCTA
- RJ
- Brazil
| | - T. P. Silva
- LNEG – Laboratório Nacional de Energia e Geologia, IP
- Unidade de Bioenergia
- 1649-038 Lisboa
- Portugal
| | - B. F. Arez
- LNEG – Laboratório Nacional de Energia e Geologia, IP
- Unidade de Bioenergia
- 1649-038 Lisboa
- Portugal
| | - J. C. Roseiro
- LNEG – Laboratório Nacional de Energia e Geologia, IP
- Unidade de Bioenergia
- 1649-038 Lisboa
- Portugal
| | - M. L. L. Martins
- UENF – Universidade Estadual do Norte Fluminense Darcy Ribeiro
- LTA-CCTA
- RJ
- Brazil
| | - L. Alves
- LNEG – Laboratório Nacional de Energia e Geologia, IP
- Unidade de Bioenergia
- 1649-038 Lisboa
- Portugal
| |
Collapse
|
26
|
Kuo YC, Yuan SF, Wang CA, Huang YJ, Guo GL, Hwang WS. Production of optically pure L-lactic acid from lignocellulosic hydrolysate by using a newly isolated and D-lactate dehydrogenase gene-deficient Lactobacillus paracasei strain. BIORESOURCE TECHNOLOGY 2015; 198:651-7. [PMID: 26433790 DOI: 10.1016/j.biortech.2015.09.071] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Revised: 09/17/2015] [Accepted: 09/20/2015] [Indexed: 05/14/2023]
Abstract
The use of lignocellulosic feedstock for lactic acid production with a difficulty is that the release of inhibitory compounds during the pretreatment process which inhibit the growth of microorganism. Thus we report a novel lactic acid bacterium, Lactobacillus paracasei 7 BL, that has a high tolerance to inhibitors and produced optically pure l-lactic acid after the interruption of ldhD gene. The strain 7 BL fermented glucose efficiently and showed high titer of l-lactic acid (215 g/l) by fed-batch strategy. In addition, 99 g/l of l-lactic acid with high yield (0.96 g/g) and productivity (2.25-3.23 g/l/h) was obtained by using non-detoxified wood hydrolysate. Rice straw hydrolysate without detoxification was also tested and yielded a productivity rate as high as 5.27 g/l/h. Therefore, L. paracasei 7 BL represents a potential method of l-lactic acid production from lignocellulosic biomass and has attractive application for industries.
Collapse
Affiliation(s)
- Yang-Cheng Kuo
- Chemical Division, Institute of Nuclear Energy Research, Taoyuan, Taiwan, ROC
| | - Shuo-Fu Yuan
- Chemical Division, Institute of Nuclear Energy Research, Taoyuan, Taiwan, ROC
| | - Chun-An Wang
- Chemical Division, Institute of Nuclear Energy Research, Taoyuan, Taiwan, ROC
| | - Yin-Jung Huang
- Chemical Division, Institute of Nuclear Energy Research, Taoyuan, Taiwan, ROC
| | - Gia-Luen Guo
- Chemical Division, Institute of Nuclear Energy Research, Taoyuan, Taiwan, ROC.
| | - Wen-Song Hwang
- Chemical Division, Institute of Nuclear Energy Research, Taoyuan, Taiwan, ROC
| |
Collapse
|
27
|
Portugal-Nunes D, Sànchez i Nogué V, Pereira SR, Craveiro SC, Calado AJ, Xavier AMRB. Effect of cell immobilization and pH on Scheffersomyces stipitis growth and fermentation capacity in rich and inhibitory media. BIORESOUR BIOPROCESS 2015. [DOI: 10.1186/s40643-015-0042-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
A wide range of value-added products can potentially be produced by bioprocessing hardwood spent sulfite liquors (HSSLs) that are by-products of pulp and paper industry with a high pentose sugar content. However, besides sugars, HSSLs contain considerable amounts of sulfonated lignin derivatives and acetic acid that inhibit the metabolic activity of most microorganisms. Scheffersomyces stipitis is a yeast with high capacity to ferment the pentose sugar xylose under appropriate microaerophilic conditions but it has limited tolerance to HSSL inhibitors. In the present study, cultivations of suspended and immobilized S. stipitis were compared in terms of growth capacity and by-product formation using rich medium and HSSL to investigate whether the immobilization of cells in calcium alginate beads could be a protection against inhibitors while favoring the presence of microaerophilic conditions.
Results
Whereas cell immobilization clearly favored the fermentative metabolism in rich medium, pH control was found to play a more important role than cell immobilization on the ethanol production efficiency from bio-detoxified HSSL (bdHSSL), leading to an improvement of 1.3-fold on the maximum ethanol productivity than using suspended cells. When immobilization and pH control were applied simultaneously, the ethanol yield improved by 1.3-fold with unchanged productivity, reaching 0.26 g ethanol.(g glucose + xylose)−1. Analysis of the immobilized beads inside revealed that the cells had grown in the opposite direction of the cortex.
Conclusions
Immobilization and pH control at 5.5, when applied simultaneously, have a positive impact on the fermentative metabolism of S. stipitis, improving the ethanol production efficiency. For the first time light microscopic analysis of the beads suggested that the nutrient and mass transfer limitations played a more important role in the fermentation than a possible protective role against inhibitors.
Collapse
|
28
|
Wang G, Huang D, Li Y, Wen J, Jia X. A metabolic-based approach to improve xylose utilization for fumaric acid production from acid pretreated wheat bran by Rhizopus oryzae. BIORESOURCE TECHNOLOGY 2015; 180:119-127. [PMID: 25594507 DOI: 10.1016/j.biortech.2014.12.091] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Revised: 12/24/2014] [Accepted: 12/26/2014] [Indexed: 06/04/2023]
Abstract
In this work, wheat bran (WB) was utilized as feedstock to synthesize fumaric acid by Rhizopus oryzae. Firstly, the pretreatment process of WB by dilute sulfuric acid hydrolysis undertaken at 100°C for 30min offered the best performance for fumaric acid production. Subsequently, through optimizing the seed culture medium, a suitable morphology (0.55mm pellets diameter) of R. oryzae was obtained. Furthermore, a metabolic-based approach was developed to profile the differences of intracellular metabolites concentration of R. oryzae between xylose (the abundant sugar in wheat bran hydrolysate (WBH)) and glucose metabolism. The xylitol, sedoheptulose 7-phosphate, ribulose 5-phosphate, glucose 6-phosphate, proline and serine were responsible for fumaric acid biosynthesis limitation in xylose fermentation. Consequently, regulation strategies were proposed, leading to a 149% increase in titer (up to 15.4g/L). Finally, by combinatorial regulation strategies the highest production was 20.2g/L from WBH, 477% higher than that of initial medium.
Collapse
Affiliation(s)
- Guanyi Wang
- Key Laboratory of System Bioengineering (Tianjin University), Ministry of Education, Tianjin 300072, People's Republic of China; SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), 300072, People's Republic of China
| | - Di Huang
- TEDA School of Biological Sciences and Biotechnology, Nankai University, TEDA, Tianjin 300457, People's Republic of China
| | - Yong Li
- Key Laboratory of System Bioengineering (Tianjin University), Ministry of Education, Tianjin 300072, People's Republic of China; SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), 300072, People's Republic of China
| | - Jianping Wen
- Key Laboratory of System Bioengineering (Tianjin University), Ministry of Education, Tianjin 300072, People's Republic of China; SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), 300072, People's Republic of China.
| | - Xiaoqiang Jia
- Key Laboratory of System Bioengineering (Tianjin University), Ministry of Education, Tianjin 300072, People's Republic of China; SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), 300072, People's Republic of China
| |
Collapse
|
29
|
Assessing the potential of wild yeasts for bioethanol production. J Ind Microbiol Biotechnol 2014; 42:39-48. [PMID: 25413210 DOI: 10.1007/s10295-014-1544-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Accepted: 11/07/2014] [Indexed: 10/24/2022]
Abstract
Bioethanol fermentations expose yeasts to a new, complex and challenging fermentation medium with specific inhibitors and sugar mixtures depending on the type of carbon source. It is, therefore, suggested that the natural diversity of yeasts should be further exploited in order to find yeasts with good ethanol yield in stressed fermentation media. In this study, we screened more than 50 yeast isolates of which we selected five isolates with promising features. The species Candida bombi, Wickerhamomyces anomalus and Torulaspora delbrueckii showed better osmo- and hydroxymethylfurfural tolerance than Saccharomyces cerevisiae. However, S. cerevisiae isolates had the highest ethanol yield in fermentation experiments mimicking high gravity fermentations (25 % glucose) and artificial lignocellulose hydrolysates (with a myriad of inhibitors). Interestingly, among two tested S. cerevisiae strains, a wild strain isolated from an oak tree performed better than Ethanol Red, a S. cerevisiae strain which is currently commonly used in industrial bioethanol fermentations. Additionally, a W. anomalus strain isolated from sugar beet thick juice was found to have a comparable ethanol yield, but needed longer fermentation time. Other non-Saccharomyces yeasts yielded lower ethanol amounts.
Collapse
|
30
|
Genetic improvement of native xylose-fermenting yeasts for ethanol production. J Ind Microbiol Biotechnol 2014; 42:1-20. [DOI: 10.1007/s10295-014-1535-z] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Accepted: 11/02/2014] [Indexed: 12/27/2022]
|
31
|
Lee SC. Purification of xylose in simulated hemicellulosic hydrolysates using a two-step emulsion liquid membrane process. BIORESOURCE TECHNOLOGY 2014; 169:692-699. [PMID: 25108268 DOI: 10.1016/j.biortech.2014.07.067] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2014] [Revised: 07/05/2014] [Accepted: 07/17/2014] [Indexed: 06/03/2023]
Abstract
Purification of xylose in simulated hemicellulosic hydrolysates was attempted using a two-step emulsion liquid membrane (ELM) process. The effects of various experimental variables on extraction of each component in the hydrolysates were investigated in the ELM steps. In the first ELM step, acetic acid could be selectively removed from the hydrolysates and highly enriched in the stripping phase, and loss of xylose was insignificant. In the second ELM step, sulfuric acid could be selectively removed from simulated acetic acid-free hemicellulosic hydrolysates and somewhat enriched in the stripping phase. There was just small loss of xylose, and the final pH of the feed phase approached a pH level suitable for ethanol fermentation. Also, concentration of xylose in the feed phase was attained as an incidental outcome during each ELM run. Conclusively, the two-step ELM process was found to be a promising futuristic technology for purification of sugars in real hemicellulosic hydrolysates.
Collapse
Affiliation(s)
- Sang Cheol Lee
- Department of Chemical Engineering, Kunsan National University, 558 Daehak-ro, Kunsan, Chonbuk 573-701, Republic of Korea.
| |
Collapse
|
32
|
Zhou Y, Nie K, Zhang X, Liu S, Wang M, Deng L, Wang F, Tan T. Production of fumaric acid from biodiesel-derived crude glycerol by Rhizopus arrhizus. BIORESOURCE TECHNOLOGY 2014; 163:48-53. [PMID: 24787316 DOI: 10.1016/j.biortech.2014.04.021] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 04/06/2014] [Accepted: 04/07/2014] [Indexed: 05/28/2023]
Abstract
This work investigated the capability of Rhizopus arrhizus to assimilate biodiesel-derived crude glycerol and convert it into fumaric acid. After optimizing the initial glycerol concentration, spore inoculum and yeast extract concentration, smaller pellets (0.7 mm) and higher biomass (3.11 g/L) were obtained when R. arrhizus grew on crude glycerol. It was found that crude glycerol was more suitable than glucose for smaller R. arrhizus pellet forming. When 80 g/L crude glycerol was used as carbon source, the fumaric acid production of 4.37 g/L was obtained at 192 h. With a highest concentration of 22.81 g/L achieved in the co-fermentation of crude glycerol (40 g/L) and glucose (40 g/L) at 144 h, the fumaric acid production was enhanced by 553.6%, compared to the fermentation using glycerol (80 g/L) as sole carbon source. Moreover, the production cost of fumaric acid in co-fermentation was reduced by approximately 14% compared to glucose fermentation.
Collapse
Affiliation(s)
- Yuqing Zhou
- Beijing Bioprocess Key Laboratory, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Kaili Nie
- Beijing Bioprocess Key Laboratory, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China; Amoy - BUCT Industrial Bio-technovation Institute, Amoy 361022, PR China
| | - Xin Zhang
- Beijing Bioprocess Key Laboratory, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Shihong Liu
- Beijing Bioprocess Key Laboratory, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Meng Wang
- Beijing Bioprocess Key Laboratory, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Li Deng
- Beijing Bioprocess Key Laboratory, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China; Amoy - BUCT Industrial Bio-technovation Institute, Amoy 361022, PR China.
| | - Fang Wang
- Beijing Bioprocess Key Laboratory, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China; State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Tianwei Tan
- Beijing Bioprocess Key Laboratory, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China
| |
Collapse
|
33
|
Wang D, Ju X, Zhou D, Wei G. Efficient production of pullulan using rice hull hydrolysate by adaptive laboratory evolution of Aureobasidium pullulans. BIORESOURCE TECHNOLOGY 2014; 164:12-9. [PMID: 24835913 DOI: 10.1016/j.biortech.2014.04.036] [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: 02/08/2014] [Revised: 04/09/2014] [Accepted: 04/10/2014] [Indexed: 05/09/2023]
Abstract
Pullulan production by Aureobasidium pullulans CCTCC M 2012259 using rice hull hydrolysate as the carbon source was conducted. The acetic acid in the hydrolysate was demonstrated to exert a negative effect on pullulan biosynthesis. Instead of employing expensive methods to remove acetic acid from the hydrolysate, a mutant A. pullulans ARH-1 was isolated following 20 cycles of adaptive laboratory evolution of the parental strain on medium containing acetic acid. The maximum pullulan production achieved by the adapted mutant at 48 h using the hydrolysate of untreated rice hull was 22.2 g L(-1), while that obtained by the parental strain at 60 h was 15.6 g L(-1). The assay of key enzymes associated with pullulan biosynthesis revealed that acetic acid inhibited enzyme activity rather than suppressing enzyme synthesis. These results demonstrated that adaptive evolution highly improved the efficiency of pullulan production by A. pullulans using the hydrolysate of untreated rice hull.
Collapse
Affiliation(s)
- Dahui Wang
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China
| | - Xiaomin Ju
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China
| | - Donghai Zhou
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China
| | - Gongyuan Wei
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China; State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, PR China.
| |
Collapse
|
34
|
Culm in Rice Straw as a New Source for Sugar RecoveryviaEnzymatic Saccharification. Biosci Biotechnol Biochem 2014; 74:50-5. [DOI: 10.1271/bbb.90535] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
35
|
Zhang C, Houtman C, Zhu J. Using low temperature to balance enzymatic saccharification and furan formation during SPORL pretreatment of Douglas-fir. Process Biochem 2014. [DOI: 10.1016/j.procbio.2013.12.017] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
36
|
Shi J, Zhang M, Zhang L, Wang P, Jiang L, Deng H. Xylose-fermenting Pichia stipitis by genome shuffling for improved ethanol production. Microb Biotechnol 2014; 7:90-9. [PMID: 24393385 PMCID: PMC3937714 DOI: 10.1111/1751-7915.12092] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Revised: 09/04/2013] [Accepted: 09/09/2013] [Indexed: 11/27/2022] Open
Abstract
Xylose fermentation is necessary for the bioconversion of lignocellulose to ethanol as fuel, but wild-type Saccharomyces cerevisiae strains cannot fully metabolize xylose. Several efforts have been made to obtain microbial strains with enhanced xylose fermentation. However, xylose fermentation remains a serious challenge because of the complexity of lignocellulosic biomass hydrolysates. Genome shuffling has been widely used for the rapid improvement of industrially important microbial strains. After two rounds of genome shuffling, a genetically stable, high-ethanol-producing strain was obtained. Designated as TJ2-3, this strain could ferment xylose and produce 1.5 times more ethanol than wild-type Pichia stipitis after fermentation for 96 h. The acridine orange and propidium iodide uptake assays showed that the maintenance of yeast cell membrane integrity is important for ethanol fermentation. This study highlights the importance of genome shuffling in P. stipitis as an effective method for enhancing the productivity of industrial strains.
Collapse
Affiliation(s)
- Jun Shi
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, China
| | | | | | | | | | | |
Collapse
|
37
|
Study of chemical pretreatment and enzymatic saccharification for producing fermentable sugars from rice straw. Bioprocess Biosyst Eng 2013; 37:1337-44. [DOI: 10.1007/s00449-013-1106-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Accepted: 11/29/2013] [Indexed: 10/25/2022]
|
38
|
Abu Tayeh H, Najami N, Dosoretz C, Tafesh A, Azaizeh H. Potential of bioethanol production from olive mill solid wastes. BIORESOURCE TECHNOLOGY 2013; 152:24-30. [PMID: 24275022 DOI: 10.1016/j.biortech.2013.10.102] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2013] [Revised: 10/24/2013] [Accepted: 10/28/2013] [Indexed: 06/02/2023]
Abstract
The main objective of this study was to screen endogenous microorganisms grown on olive mill solid wastes (OMSW) with the potential to ferment pentoses and produce ethanol. Two yeasts were isolated and identified as Issatchenkia orientalis, and Pichia galeiformis/manshurica. The adaptation of the strains displayed a positive impact on the fermentation process. In terms of xylose utilization and ethanol production, all strains were able to utilize xylose and produce xylitol but no ethanol was detected. Separate hydrolysis and fermentation process on hydrolysate undergo detoxification, strain I. orientalis showed the best efficiency in producing of ethanol when supplemented with glucose. Using simultaneous saccharification and fermentation process following pretreatment of OMSW, the average ethanol yield was 3 g/100 g dry OMSW. Bioethanol production from OMSW is not economic despite the raw material is cheap.
Collapse
Affiliation(s)
- Hiba Abu Tayeh
- Institute of Applied Research, Affiliated with University of Haifa, The Galilee Society, P.O. Box 437, Shefa-Amr 20200, Israel.
| | - Naim Najami
- Institute of Applied Research, Affiliated with University of Haifa, The Galilee Society, P.O. Box 437, Shefa-Amr 20200, Israel; The Academic Arab College of Education, Haifa, Israel.
| | - Carlos Dosoretz
- Department of Environments, Water & Agriculture Engineering, Technion Institute, Haifa 32000, Israel.
| | - Ahmed Tafesh
- Institute of Applied Research, Affiliated with University of Haifa, The Galilee Society, P.O. Box 437, Shefa-Amr 20200, Israel.
| | - Hassan Azaizeh
- Institute of Applied Research, Affiliated with University of Haifa, The Galilee Society, P.O. Box 437, Shefa-Amr 20200, Israel; Tel Hai College, Upper Galilee 12208, Israel.
| |
Collapse
|
39
|
Impact of pseudo-continuous fermentation on the ethanol tolerance of Scheffersomyces stipitis. J Biosci Bioeng 2013; 116:319-26. [DOI: 10.1016/j.jbiosc.2013.03.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2012] [Revised: 03/05/2013] [Accepted: 03/23/2013] [Indexed: 11/18/2022]
|
40
|
Zha Y, Hossain AH, Tobola F, Sedee N, Havekes M, Punt PJ. Pichia anomala 29X: a resistant strain for lignocellulosic biomass hydrolysate fermentation. FEMS Yeast Res 2013; 13:609-17. [PMID: 23826802 DOI: 10.1111/1567-1364.12062] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 06/28/2013] [Accepted: 06/28/2013] [Indexed: 11/28/2022] Open
Abstract
To efficiently use lignocellulosic biomass hydrolysates as fermentation media for bioethanol production, besides being capable of producing significant amount of ethanol, the fermenting host should also meet the following two requirements: (1) resistant to the inhibitory compounds formed during biomass pretreatment process, (2) capable of utilizing C5 sugars, such as xylose, as carbon source. In our laboratory, a screening was conducted on microorganisms collected from environmental sources for their tolerance to hydrolysate inhibitors. A unique resistant strain was selected and identified as Pichia anomala (Wickerhamomyces anomalus), deposited as CBS 132101. The strain is able to produce ethanol in various biomass hydrolysates, both with and without oxygen. Besides, the strain could assimilate xylose and use nitrate as N source. These physiological characteristics make P. anomala an interesting strain for bioethanol production from lignocellulosic biomass hydrolysates.
Collapse
Affiliation(s)
- Ying Zha
- TNO Microbiology & Systems Biology, Zeist, The Netherlands; Netherlands Metabolomics Centre (NMC), Leiden, The Netherlands
| | | | | | | | | | | |
Collapse
|
41
|
Biswas R, Uellendahl H, Ahring BK. Conversion of C6 and C5 sugars in undetoxified wet exploded bagasse hydrolysates using Scheffersomyces (Pichia) stipitis CBS6054. AMB Express 2013; 3:42. [PMID: 23895663 PMCID: PMC3750711 DOI: 10.1186/2191-0855-3-42] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Accepted: 07/20/2013] [Indexed: 11/10/2022] Open
Abstract
Sugarcane bagasse is a potential feedstock for cellulosic ethanol production, rich in both glucan and xylan. This stresses the importance of utilizing both C6 and C5 sugars for conversion into ethanol in order to improve the process economics. During processing of the hydrolysate degradation products such as acetate, 5-hydroxymethylfurfural (HMF) and furfural are formed, which are known to inhibit microbial growth at higher concentrations. In the current study, conversion of both glucose and xylose sugars into ethanol in wet exploded bagasse hydrolysates was investigated without detoxification using Scheffersomyces (Pichia) stipitis CBS6054, a native xylose utilizing yeast strain. The sugar utilization ratio and ethanol yield (Yp/s) ranged from 88-100% and 0.33-0.41 ± 0.02 g/g, respectively, in all the hydrolysates tested. Hydrolysate after wet explosion at 185°C and 6 bar O2, composed of mixed sugars (glucose and xylose) and inhibitors such as acetate, HMF and furfural at concentrations of 3.2 ± 0.1, 0.4 and 0.5 g/l, respectively, exhibited highest cell growth rate of 0.079 g/l/h and an ethanol yield of 0.39 ± 0.02 g/g sugar converted. Scheffersomyces stipitis exhibited prolonged fermentation time on bagasse hydrolysate after wet explosion at 200°C and 6 bar O2 where the inhibitors concentration was further increased. Nonetheless, ethanol was produced up to 18.7 ± 1.1 g/l resulting in a yield of 0.38 ± 0.02 g/g after 82 h of fermentation.
Collapse
|
42
|
Kumari R, Pramanik K. Bioethanol production from Ipomoea carnea biomass using a potential hybrid yeast strain. Appl Biochem Biotechnol 2013; 171:771-85. [PMID: 23892623 DOI: 10.1007/s12010-013-0398-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Accepted: 07/12/2013] [Indexed: 11/29/2022]
Abstract
The paper deals with the exploitation of Ipomoea carnea as a feedstock for the production of bioethanol. Dilute acid pretreatment under optimum conditions (3%H2SO4, 120 °C for 45 min) produced 17.68 g L(-1) sugars along with 1.02 g L(-1) phenolics and 1.13 g L(-1) furans. A combination of overliming and activated charcoal adsorption facilitated the removal of 91.9% furans and 94.7% phenolics from acid hydrolysate. The pretreated biomass was further treated with a mixture of sodium sulphite and sodium chlorite and, a maximum lignin removal of 81.6% was achieved. The enzymatic saccharification of delignified biomass resulted in 79.4% saccharification with a corresponding sugar yield of 753.21 mg g(-1). Equal volume of enzymatic hydrolysate and acid hydrolysate were mixed and used for fermentation with a hybrid yeast strain RPRT90. Fermentation of mixed detoxified hydrolysate at 30 °C for 28 h produced ethanol with a yield of 0.461 g g(-1). A comparable ethanol yield (0.414 g g(-1)) was achieved using a mixture of enzymatic hydrolysate and undetoxified acid hydrolysate. Thus, I. carnea biomass has been demonstrated to be a potential feedstock for bioethanol production, and the use of hybrid yeast may pave the way to produce bioethanol from this biomass.
Collapse
Affiliation(s)
- Rajni Kumari
- Department of Biotechnology and Medical Engineering, National Institute of Technology, Rourkela, Odisha, India,
| | | |
Collapse
|
43
|
Demeke MM, Dietz H, Li Y, Foulquié-Moreno MR, Mutturi S, Deprez S, Den Abt T, Bonini BM, Liden G, Dumortier F, Verplaetse A, Boles E, Thevelein JM. Development of a D-xylose fermenting and inhibitor tolerant industrial Saccharomyces cerevisiae strain with high performance in lignocellulose hydrolysates using metabolic and evolutionary engineering. BIOTECHNOLOGY FOR BIOFUELS 2013; 6:89. [PMID: 23800147 PMCID: PMC3698012 DOI: 10.1186/1754-6834-6-89] [Citation(s) in RCA: 189] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Accepted: 06/12/2013] [Indexed: 05/04/2023]
Abstract
BACKGROUND The production of bioethanol from lignocellulose hydrolysates requires a robust, D-xylose-fermenting and inhibitor-tolerant microorganism as catalyst. The purpose of the present work was to develop such a strain from a prime industrial yeast strain, Ethanol Red, used for bioethanol production. RESULTS An expression cassette containing 13 genes including Clostridium phytofermentans XylA, encoding D-xylose isomerase (XI), and enzymes of the pentose phosphate pathway was inserted in two copies in the genome of Ethanol Red. Subsequent EMS mutagenesis, genome shuffling and selection in D-xylose-enriched lignocellulose hydrolysate, followed by multiple rounds of evolutionary engineering in complex medium with D-xylose, gradually established efficient D-xylose fermentation. The best-performing strain, GS1.11-26, showed a maximum specific D-xylose consumption rate of 1.1 g/g DW/h in synthetic medium, with complete attenuation of 35 g/L D-xylose in about 17 h. In separate hydrolysis and fermentation of lignocellulose hydrolysates of Arundo donax (giant reed), spruce and a wheat straw/hay mixture, the maximum specific D-xylose consumption rate was 0.36, 0.23 and 1.1 g/g DW inoculum/h, and the final ethanol titer was 4.2, 3.9 and 5.8% (v/v), respectively. In simultaneous saccharification and fermentation of Arundo hydrolysate, GS1.11-26 produced 32% more ethanol than the parent strain Ethanol Red, due to efficient D-xylose utilization. The high D-xylose fermentation capacity was stable after extended growth in glucose. Cell extracts of strain GS1.11-26 displayed 17-fold higher XI activity compared to the parent strain, but overexpression of XI alone was not enough to establish D-xylose fermentation. The high D-xylose consumption rate was due to synergistic interaction between the high XI activity and one or more mutations in the genome. The GS1.11-26 had a partial respiratory defect causing a reduced aerobic growth rate. CONCLUSIONS An industrial yeast strain for bioethanol production with lignocellulose hydrolysates has been developed in the genetic background of a strain widely used for commercial bioethanol production. The strain uses glucose and D-xylose with high consumption rates and partial cofermentation in various lignocellulose hydrolysates with very high ethanol yield. The GS1.11-26 strain shows highly promising potential for further development of an all-round robust yeast strain for efficient fermentation of various lignocellulose hydrolysates.
Collapse
Affiliation(s)
- Mekonnen M Demeke
- Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology, KU Leuven, Belgium
- Department of Molecular Microbiology, VIB, Kasteelpark Arenberg 31, B-3001 Leuven, Heverlee, Flanders, Belgium
| | - Heiko Dietz
- Institute of Molecular Biosciences, Goethe-University Frankfurt, Max-von-Laue-Str. 9, D-60438 Frankfurt am Main, Germany
| | - Yingying Li
- Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology, KU Leuven, Belgium
- Department of Molecular Microbiology, VIB, Kasteelpark Arenberg 31, B-3001 Leuven, Heverlee, Flanders, Belgium
| | - María R Foulquié-Moreno
- Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology, KU Leuven, Belgium
- Department of Molecular Microbiology, VIB, Kasteelpark Arenberg 31, B-3001 Leuven, Heverlee, Flanders, Belgium
| | - Sarma Mutturi
- Department of Chemical Engineering, Lund University, P.O. Box 124, 22100 Lund, Sweden
| | - Sylvie Deprez
- Laboratory of Enzyme, Fermentation and Brewing Technology, KAHO Sint-Lieven University College, KU Leuven Association, Gebroeders De Smetstraat 1, 9000, Ghent, Flanders, Belgium
| | - Tom Den Abt
- Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology, KU Leuven, Belgium
- Department of Molecular Microbiology, VIB, Kasteelpark Arenberg 31, B-3001 Leuven, Heverlee, Flanders, Belgium
| | - Beatriz M Bonini
- Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology, KU Leuven, Belgium
- Department of Molecular Microbiology, VIB, Kasteelpark Arenberg 31, B-3001 Leuven, Heverlee, Flanders, Belgium
| | - Gunnar Liden
- Department of Chemical Engineering, Lund University, P.O. Box 124, 22100 Lund, Sweden
| | - Françoise Dumortier
- Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology, KU Leuven, Belgium
- Department of Molecular Microbiology, VIB, Kasteelpark Arenberg 31, B-3001 Leuven, Heverlee, Flanders, Belgium
| | - Alex Verplaetse
- Laboratory of Enzyme, Fermentation and Brewing Technology, KAHO Sint-Lieven University College, KU Leuven Association, Gebroeders De Smetstraat 1, 9000, Ghent, Flanders, Belgium
| | - Eckhard Boles
- Institute of Molecular Biosciences, Goethe-University Frankfurt, Max-von-Laue-Str. 9, D-60438 Frankfurt am Main, Germany
| | - Johan M Thevelein
- Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology, KU Leuven, Belgium
- Department of Molecular Microbiology, VIB, Kasteelpark Arenberg 31, B-3001 Leuven, Heverlee, Flanders, Belgium
| |
Collapse
|
44
|
RETRACTED ARTICLE: Recent advancement in production of liquid biofuels from renewable resources: a review. RESEARCH ON CHEMICAL INTERMEDIATES 2013. [DOI: 10.1007/s11164-013-1231-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
45
|
Fernandes DLA, Silva CM, Xavier AMRB, Evtuguin DV. Fractionation of sulphite spent liquor for biochemical processing using ion exchange resins. J Biotechnol 2012; 162:415-21. [PMID: 22465600 DOI: 10.1016/j.jbiotec.2012.03.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2012] [Revised: 03/09/2012] [Accepted: 03/15/2012] [Indexed: 10/28/2022]
Abstract
Sulphite spent liquor (SSL) is a side product from acidic sulphite pulping of wood, which organic counterpart is composed mainly by lignosulphonates (LS) and sugars. The last are a prominent substrate for the bioprocessing although a previous purification step is necessary to eliminate microbial inhibitors. In this study a fractionation of hardwood SSL (HSSL) has been accomplished employing ion exchange resins in order to separate sugars fraction from concomitant inhibitors: LS, acetic acid, furan derivatives, phenolics, acetic acid and excess of inorganic salts. The fractionation of HSSL has been carried out using two fixed-bed ion exchangers in series (cationic+anionic). The first cation exchange column packed with Dowex 50WX2 resin was able to eliminate free cations and partially separate sugars from high molecular weight LS and furan derivatives. The second anion exchange column packed with Amberlite IRA-96 sorbed remaining LS, phenolics and acetic acid. Overall, the series arrangement under investigation has removed 99.99% of Mg(2+), 99.0% of Ca(2+), 99.6% of LS, and 100% of acetic acid, whereas the yield of recovered sugars was at least 72% of their total amount in HSSL.
Collapse
Affiliation(s)
- D L A Fernandes
- CICECO, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | | | | | | |
Collapse
|
46
|
Chakraborty S, Aggarwal V, Mukherjee D, Andras K. Biomass to biofuel: a review on production technology. ASIA-PAC J CHEM ENG 2012. [DOI: 10.1002/apj.1642] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Sudip Chakraborty
- Research Institute on Membrane Technology, CNR-ITM; c/o University of Calabria; Via P. Bucci, Cubo-17/C; 87036; Rende (CS); Italy
| | - Varun Aggarwal
- Department of Chemical Engineering, Indian Institute of Technology; Kharagpur; 721 302; West Bengal; India
| | - Debolina Mukherjee
- Department of Geological Sciences; University of Calabria; Cubo-15B,Via-P. Bucci; 87036; Rende (CS); Italy
| | - Koris Andras
- Department of Food Engineering, Faculty of Food Science; Corvinus University of Budapest; Ménesi út 44; Budapest; H-1118; Hungary
| |
Collapse
|
47
|
Lin TH, Huang CF, Guo GL, Hwang WS, Huang SL. Pilot-scale ethanol production from rice straw hydrolysates using xylose-fermenting Pichia stipitis. BIORESOURCE TECHNOLOGY 2012; 116:314-319. [PMID: 22537402 DOI: 10.1016/j.biortech.2012.03.089] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Revised: 03/01/2012] [Accepted: 03/27/2012] [Indexed: 05/31/2023]
Abstract
Ethanol was produced at pilot scale from rice straw hydrolysates using a Pichia stipitis strain previously adapted to NaOH-neutralized hydrolysates. The highest ethanol yield was 0.44 ± 0.02 g(p)/g(s) at an aeration rate of 0.05 vvm using overliming-detoxified hydrolysates. The yield with hydrolysates conditioned by ammonia and NaOH was 0.39 ± 0.01 and 0.34 ± 0.01 g(p)/g(s), respectively, were achieved at the same aeration rate. The actual ethanol yield from hydrolysate fermentation with ammonia neutralization was similar to that with overliming hydrolysate after taking into account the xylose loss resulting from these conditioning processes. Moreover, the ethanol yield from ammonia-neutralized hydrolysates could be further enhanced by increasing the initial cell density by two-fold or reducing the combined concentration of furfural and 5-hydroxymethyl furfural to 0.6g/L by reducing the severity of operational conditions in pretreatment. This study demonstrated the potential for commercial ethanol production from rice straw via xylose fermentation.
Collapse
Affiliation(s)
- Ting-Hsiang Lin
- Department of Life Sciences, National Central University, No 300, Jhongda Rd, Jhongli City, Taoyuan County 32001, Taiwan, ROC
| | | | | | | | | |
Collapse
|
48
|
Taylor MP, Mulako I, Tuffin M, Cowan D. Understanding physiological responses to pre-treatment inhibitors in ethanologenic fermentations. Biotechnol J 2012; 7:1169-81. [PMID: 22331581 DOI: 10.1002/biot.201100335] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2011] [Revised: 12/15/2011] [Accepted: 01/17/2012] [Indexed: 11/10/2022]
Abstract
Alcohol-based liquid fuels feature significantly in the political and social agendas of many countries, seeking energy sustainability. It is certain that ethanol will be the entry point for many sustainable processes. Conventional ethanol production using maize- and sugarcane-based carbohydrates with Saccharomyces cerevisiae is well established, while lignocellulose-based processes are receiving growing interest despite posing greater technical and scientific challenges. A significant challenge that arises from the chemical hydrolysis of lignocellulose is the generation of toxic compounds in parallel with the release of sugars. These compounds, collectively termed pre-treatment inhibitors, impair metabolic functionality and growth. Their removal, pre-fermentation or their abatement, via milder hydrolysis, are currently uneconomic options. It is widely acknowledged that a more cost effective strategy is to develop resistant process strains. Here we describe and classify common inhibitors and describe in detail the reported physiological responses that occur in second-generation strains, which include engineered yeast and mesophilic and thermophilic prokaryotes. It is suggested that a thorough understanding of tolerance to common pre-treatment inhibitors should be a major focus in ongoing strain engineering. This review is a useful resource for future metabolic engineering strategies.
Collapse
Affiliation(s)
- Mark P Taylor
- TMO Renewables Ltd., The Surrey Research Park, Guildford, UK
| | | | | | | |
Collapse
|
49
|
Improved Ethanol and Reduced Xylitol Production from Glucose and Xylose Mixtures by the Mutant Strain of Candida shehatae ATCC 22984. Appl Biochem Biotechnol 2012; 166:1781-90. [DOI: 10.1007/s12010-012-9586-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2011] [Accepted: 01/23/2012] [Indexed: 10/14/2022]
|
50
|
Kolb M, Sieber V, Amann M, Faulstich M, Schieder D. Removal of monomer delignification products by laccase from Trametes versicolor. BIORESOURCE TECHNOLOGY 2012; 104:298-304. [PMID: 22176974 DOI: 10.1016/j.biortech.2011.11.080] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Revised: 11/18/2011] [Accepted: 11/19/2011] [Indexed: 05/31/2023]
Abstract
The influence of a laccase from Trametes versicolor on the removal of phenolic monomers in liquid hot water pretreated wheat straw supernatants (LHW-S) was examined. Beside the total phenol content derived by Folin-Ciocalteu (FC-) assay, phenolic monomers were measured via headspace-solid phase micro-extraction (HS-SPME)/GC-MS. A notable decrease of the phenols was achieved using 0.2 and 0.5 U/mL laccase whilst higher dosage showed no improvement. Nearly all kind of monomer phenolic compounds identified in the LHW-S were found to be removed after 24h. However, acetophenone and 4-hydroxybenzaldehyde (HBA) were obviously not affected by laccase. Summarizing, three laccase reaction groups (LRG) of phenolic monomers could be classified: immediate removal (LRG-A), degradation after 1 day (LRG-B), no effect of laccase (LRG-C). Additionally, HS-SPME/GC was found to be a powerful tool to study the reaction of laccase and phenolic monomers in complex lignocellulose derived solutions.
Collapse
Affiliation(s)
- Michaela Kolb
- Institute of Chemistry of Biogenic Resources, Technische Universität München, Schulgasse 16, 94315 Straubing, Germany
| | | | | | | | | |
Collapse
|