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Weiler J, Edel M, Gescher J. Biofilms for Production of Chemicals and Energy. Annu Rev Chem Biomol Eng 2024; 15:361-387. [PMID: 38382126 DOI: 10.1146/annurev-chembioeng-100522-110939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
The twenty-first century will be the century of biology. This is not only because of breakthrough advances in molecular biology tools but also because we need to reinvent our economy based on the biological principles of energy efficiency and sustainability. Consequently, new tools for production routines must be developed to help produce platform chemicals and energy sources based on sustainable resources. In this context, biofilm-based processes have the potential to impact future production processes, because they can be carried out continuously and with robust stationary biocatalysts embedded in an extracellular matrix with different properties. We review productive biofilm systems used for heterotrophic and lithoautotrophic production and attempt to identify fundamental reasons why they may be particularly suitable as future production systems.
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Affiliation(s)
- Janek Weiler
- Institute of Technical Microbiology, Hamburg University of Technology, Hamburg, Germany;
| | - Miriam Edel
- Institute of Technical Microbiology, Hamburg University of Technology, Hamburg, Germany;
| | - Johannes Gescher
- Institute of Technical Microbiology, Hamburg University of Technology, Hamburg, Germany;
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2
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Bharathi SD, Dilshani A, Rishivanthi S, Khaitan P, Vamsidhar A, Jacob S. Resource Recycling, Recovery, and Xenobiotic Remediation from E-wastes Through Biofilm Technology: A Review. Appl Biochem Biotechnol 2023; 195:5669-5692. [PMID: 35796946 DOI: 10.1007/s12010-022-04055-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/26/2022] [Indexed: 11/02/2022]
Abstract
Around 50 million tonnes of electronic waste has been generated globally per year, causing an environmental hazard and negative effects on human health, such as infertility and thyroid disorders in adults, endocrine and neurological damage in both animals and humans, and impaired mental and physical development in children. Out of that, only 15% is recycled each year and the remaining is disposed of in a landfill, illegally traded or burned, and treated in a sub-standard way. The processes of recycling are challenged by the presence of brominated flame retardants. The different recycling technologies such as the chemical and mechanical methods have been well studied, while the most promising approach is the biological method. The process of utilizing microbes to decontaminate and degrade a wide range of pollutants into harmless products is known as bioremediation and it is an eco-friendly, cost-effective, and sustainable method. The bioremediation process is significantly aided by biofilm communities attached to electronic waste because they promote substrate bioavailability, metabolite transfer, and cell viability, all of which accelerate bioleaching and biodegradation. Microbes existing in biofilm mode relatable to free-floating planktonic cells are advantageous of bioremediation due to their tolerant ability to environmental stress and pollutants through diverse catabolic pathways. This article discusses the harmful effects of electronic waste and its management using biological strategies especially biofilm-forming communities for resource recovery.
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Affiliation(s)
- Sundaram Deepika Bharathi
- Department of Biotechnology, School of Bioengineering, College of Engineering and Technology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur, Chengalpattu Dist., 603203, Tamil Nadu, India
| | - Aswin Dilshani
- Department of Biotechnology, School of Bioengineering, College of Engineering and Technology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur, Chengalpattu Dist., 603203, Tamil Nadu, India
| | - Srinivasan Rishivanthi
- Department of Biotechnology, School of Bioengineering, College of Engineering and Technology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur, Chengalpattu Dist., 603203, Tamil Nadu, India
| | - Pratham Khaitan
- Department of Biotechnology, School of Bioengineering, College of Engineering and Technology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur, Chengalpattu Dist., 603203, Tamil Nadu, India
| | - Adhinarayan Vamsidhar
- Department of Biotechnology, School of Bioengineering, College of Engineering and Technology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur, Chengalpattu Dist., 603203, Tamil Nadu, India
| | - Samuel Jacob
- Department of Biotechnology, School of Bioengineering, College of Engineering and Technology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur, Chengalpattu Dist., 603203, Tamil Nadu, India.
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3
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Liu L, Li JT, Li SH, Liu LP, Wu B, Wang YW, Yang SH, Chen CH, Tan FR, He MX. The potential use of Zymomonas mobilis for the food industry. Crit Rev Food Sci Nutr 2022; 64:4134-4154. [PMID: 36345974 DOI: 10.1080/10408398.2022.2139221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Zymomonas mobilis is a gram-negative facultative anaerobic spore, which is generally recognized as a safe. As a promising ethanologenic organism for large-scale bio-ethanol production, Z. mobilis has also shown a good application prospect in food processing and food additive synthesis for its unique physiological characteristics and excellent industrial characteristics. It not only has obvious advantages in food processing and becomes the biorefinery chassis cell for food additives, but also has a certain healthcare effect on human health. Until to now, most of the research is still in theory and laboratory scale, and further research is also needed to achieve industrial production. This review summarized the physiological characteristics and advantages of Z. mobilis in food industry for the first time and further expounds its research status in food industry from three aspects of food additive synthesis, fermentation applications, and prebiotic efficacy, it will provide a theoretical basis for its development and applications in food industry. This review also discussed the shortcomings of its practical applications in the current food industry, and explored other ways to broaden the applications of Z. mobilis in the food industry, to promote its applications in food processing.
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Affiliation(s)
- Lu Liu
- Biomass Energy Technology Research Centre, Key Laboratory of Development and Application of Rural Renewable Energy (Ministry of Agriculture and Rural Affairs), Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu, P.R. China
- College of Food and Bioengineering, Chengdu University, Chengdu, P.R. China
| | - Jian-Ting Li
- Biomass Energy Technology Research Centre, Key Laboratory of Development and Application of Rural Renewable Energy (Ministry of Agriculture and Rural Affairs), Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu, P.R. China
| | - Sheng-Hao Li
- Biomass Energy Technology Research Centre, Key Laboratory of Development and Application of Rural Renewable Energy (Ministry of Agriculture and Rural Affairs), Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu, P.R. China
| | - Lin-Pei Liu
- Biomass Energy Technology Research Centre, Key Laboratory of Development and Application of Rural Renewable Energy (Ministry of Agriculture and Rural Affairs), Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu, P.R. China
| | - Bo Wu
- Biomass Energy Technology Research Centre, Key Laboratory of Development and Application of Rural Renewable Energy (Ministry of Agriculture and Rural Affairs), Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu, P.R. China
| | - Yan-Wei Wang
- Biomass Energy Technology Research Centre, Key Laboratory of Development and Application of Rural Renewable Energy (Ministry of Agriculture and Rural Affairs), Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu, P.R. China
| | - Shi-Hui Yang
- State Key Laboratory of Biocatalysis and Enzyme Engineering, and School of Life Sciences, Hubei University, Wuhan, Hubei, P.R. China
| | - Cheng-Han Chen
- Biomass Energy Technology Research Centre, Key Laboratory of Development and Application of Rural Renewable Energy (Ministry of Agriculture and Rural Affairs), Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu, P.R. China
| | - Fu-Rong Tan
- Biomass Energy Technology Research Centre, Key Laboratory of Development and Application of Rural Renewable Energy (Ministry of Agriculture and Rural Affairs), Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu, P.R. China
| | - Ming-Xiong He
- Biomass Energy Technology Research Centre, Key Laboratory of Development and Application of Rural Renewable Energy (Ministry of Agriculture and Rural Affairs), Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu, P.R. China
- College of Food and Bioengineering, Chengdu University, Chengdu, P.R. China
- Institute of Ecological Environment, Chengdu University of Technology, Chengdu, P.R. China
- Chengdu National Agricultural Science and Technology Center, Chengdu, P.R. China
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4
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Carvalho FM, Azevedo A, Ferreira MM, Mergulhão FJM, Gomes LC. Advances on Bacterial and Fungal Biofilms for the Production of Added-Value Compounds. BIOLOGY 2022; 11:biology11081126. [PMID: 36009752 PMCID: PMC9405441 DOI: 10.3390/biology11081126] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 07/21/2022] [Accepted: 07/22/2022] [Indexed: 11/24/2022]
Abstract
Simple Summary The production of bio-based materials, including organic acids, antibiotics, enzymes, ethanol, and hydrogen, is generally done by the cultivation of suspended cells rather than using immobilized cells. However, several studies suggest the application of productive biofilms as a reliable alternative for biocatalysis, with many advantages over suspended-growth systems. This review gives an overview of the breakthrough in the application of biofilm platforms for the sustainable production of valuable compounds, with particular insight into the latest advances in the production of recombinant proteins. Productive biofilms are shown to improve production rates and product yields, demonstrating great potential for industrial applications. Abstract In recent years, abundant research has been performed on biofilms for the production of compounds with biotechnological and industrial relevance. The use of biofilm platforms has been seen as a compelling approach to producing fine and bulk chemicals such as organic acids, alcohols, and solvents. However, the production of recombinant proteins using this system is still scarce. Biofilm reactors are known to have higher biomass density, operational stability, and potential for long-term operation than suspended cell reactors. In addition, there is an increasing demand to harness industrial and agricultural wastes and biorefinery residues to improve process sustainability and reduce production costs. The synthesis of recombinant proteins and other high-value compounds is mainly achieved using suspended cultures of bacteria, yeasts, and fungi. This review discusses the use of biofilm reactors for the production of recombinant proteins and other added-value compounds using bacteria and fungi.
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Affiliation(s)
- Fábio M. Carvalho
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal; (F.M.C.); (A.A.); (M.M.F.); (F.J.M.M.)
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Ana Azevedo
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal; (F.M.C.); (A.A.); (M.M.F.); (F.J.M.M.)
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Marta M. Ferreira
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal; (F.M.C.); (A.A.); (M.M.F.); (F.J.M.M.)
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Filipe J. M. Mergulhão
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal; (F.M.C.); (A.A.); (M.M.F.); (F.J.M.M.)
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Luciana C. Gomes
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal; (F.M.C.); (A.A.); (M.M.F.); (F.J.M.M.)
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- Correspondence:
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5
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Teke GM, Tai SL, Pott RWM. Extractive Fermentation Processes: Modes of Operation and Application. CHEMBIOENG REVIEWS 2021. [DOI: 10.1002/cben.202100028] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- George M. Teke
- University of Stellenbosch Department of Process Engineering Stellenbosch South Africa
| | - Siew L. Tai
- University of Cape Town Department of Chemical Engineering Cape Town South Africa
| | - Robert W. M. Pott
- University of Stellenbosch Department of Process Engineering Stellenbosch South Africa
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6
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Recent Advances in Lactic Acid Production by Lactic Acid Bacteria. Appl Biochem Biotechnol 2021; 193:4151-4171. [PMID: 34519919 DOI: 10.1007/s12010-021-03672-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 09/03/2021] [Indexed: 02/07/2023]
Abstract
Lactic acid can synthesize high value-added chemicals such as poly lactic acid. In order to further minimize the cost of lactic acid production, some effective strategies (e.g., effective mutagenesis and metabolic engineering) have been applied to increase productive capacity of lactic acid bacteria. In addition, low-cost cheap raw materials (e.g., cheap carbon source and cheap nitrogen source) are also used to reduce the cost of lactic acid production. In this review, we summarized the recent developments in lactic acid production, including efficient strain modification technology (high-efficiency mutagenesis means, adaptive laboratory evolution, and metabolic engineering), the use of low-cost cheap raw materials, and also discussed the future prospects of this field, which could promote the development of lactic acid industry.
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7
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Augustiniene E, Valanciene E, Matulis P, Syrpas M, Jonuskiene I, Malys N. Bioproduction of l- and d-lactic acids: advances and trends in microbial strain application and engineering. Crit Rev Biotechnol 2021; 42:342-360. [PMID: 34412525 DOI: 10.1080/07388551.2021.1940088] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Lactic acid is an important platform chemical used in the food, agriculture, cosmetic, pharmaceutical, and chemical industries. It serves as a building block for the production of polylactic acid (PLA), a biodegradable polymer, which can replace traditional petroleum-based plastics and help to reduce environmental pollution. Cost-effective production of optically pure l- and d-lactic acids is necessary to achieve a quality and thermostable PLA product. This paper evaluates research advances in the bioproduction of l- and d-lactic acids using microbial fermentation. Special emphasis is given to the development of metabolically engineered microbial strains and processes tailored to alternative and flexible feedstock concepts such as: lignocellulose, glycerol, C1-gases, and agricultural-food industry byproducts. Alternative fermentation concepts that can improve lactic acid production are discussed. The potential use of inducible gene expression systems for the development of biosensors to facilitate the screening and engineering of lactic acid-producing microorganisms is discussed.
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Affiliation(s)
- Ernesta Augustiniene
- Faculty of Chemical Technology, Bioprocess Research Centre, Kaunas University of Technology, Kaunas, Lithuania
| | - Egle Valanciene
- Faculty of Chemical Technology, Bioprocess Research Centre, Kaunas University of Technology, Kaunas, Lithuania
| | - Paulius Matulis
- Faculty of Chemical Technology, Bioprocess Research Centre, Kaunas University of Technology, Kaunas, Lithuania
| | - Michail Syrpas
- Faculty of Chemical Technology, Bioprocess Research Centre, Kaunas University of Technology, Kaunas, Lithuania
| | - Ilona Jonuskiene
- Faculty of Chemical Technology, Bioprocess Research Centre, Kaunas University of Technology, Kaunas, Lithuania
| | - Naglis Malys
- Faculty of Chemical Technology, Bioprocess Research Centre, Kaunas University of Technology, Kaunas, Lithuania
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8
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Abedi E, Hashemi SMB. Lactic acid production - producing microorganisms and substrates sources-state of art. Heliyon 2020; 6:e04974. [PMID: 33088933 PMCID: PMC7566098 DOI: 10.1016/j.heliyon.2020.e04974] [Citation(s) in RCA: 105] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/08/2020] [Accepted: 09/16/2020] [Indexed: 01/18/2023] Open
Abstract
Lactic acid is an organic compound produced via fermentation by different microorganisms that are able to use different carbohydrate sources. Lactic acid bacteria are the main bacteria used to produce lactic acid and among these, Lactobacillus spp. have been showing interesting fermentation capacities. The use of Bacillus spp. revealed good possibilities to reduce the fermentative costs. Interestingly, lactic acid high productivity was achieved by Corynebacterium glutamicum and E. coli, mainly after engineering genetic modification. Fungi, like Rhizopus spp. can metabolize different renewable carbon resources, with advantageously amylolytic properties to produce lactic acid. Additionally, yeasts can tolerate environmental restrictions (for example acidic conditions), being the wild-type low lactic acid producers that have been improved by genetic manipulation. Microalgae and cyanobacteria, as photosynthetic microorganisms can be an alternative lactic acid producer without carbohydrate feed costs. For lactic acid production, it is necessary to have substrates in the fermentation medium. Different carbohydrate sources can be used, from plant waste as molasses, starchy, lignocellulosic materials as agricultural and forestry residues. Dairy waste also can be used by the addition of supplementary components with a nitrogen source.
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Affiliation(s)
- Elahe Abedi
- Department of Food Science and Technology, College of Agriculture, Fasa University, Fasa, Iran
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9
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Teke GM, Pott RWM. Design and evaluation of a continuous semipartition bioreactor for in situ liquid-liquid extractive fermentation. Biotechnol Bioeng 2020; 118:58-71. [PMID: 32876954 DOI: 10.1002/bit.27550] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 08/04/2020] [Accepted: 08/29/2020] [Indexed: 11/09/2022]
Abstract
Extractive fermentation (or in situ product removal (ISPR)) is an operational method used to combat product inhibition in fermentations. To achieve ISPR, different separation techniques, modes of operation and physical reactor configurations have been proposed. However, the relative paucity of industrial application necessitates continued investigation into reactor systems. This article outlines a bioreactor designed to facilitate in situ product extraction and recovery, through adapting the reaction volume to include a settler and solvent extraction and recycle section. This semipartition bioreactor is proposed as a new mode of operation for continuous liquid-liquid extractive fermentation. The design is demonstrated as a modified bench-top fermentation vessel, initially analysed in terms of fluid dynamic studies, in a model two-liquid phase system. A continuous abiotic simulation of lactic acid (LA) fermentation is then demonstrated. The results show that mixing in the main reaction vessel is unaffected by the inserted settling zone, and that the size of the settling tube effects the maximum volumetric removal rate. In these tests the largest settling tube gave a potential continuous volumetric removal rate of 7.63 ml/min; sufficiently large to allow for continuous product extraction even in a highly productive fermentation. To demonstrate the applicability of the developed reactor, an abiotic simulation of a LA fermentation was performed. LA was added to reactor continuously at a rate of 33ml/h, while continuous in situ extraction removed the LA using 15% trioctylamine in oleyl alcohol. The reactor showed stable LA concentration of 1 g/L, with the balance of the LA successfully extracted and recovered using back extraction. This study demonstrates a potentially useful physical configuration for continuous in situ extraction.
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Affiliation(s)
- George M Teke
- Department of Process Engineering, University of Stellenbosch, Stellenbosch, South Africa
| | - Robert W M Pott
- Department of Process Engineering, University of Stellenbosch, Stellenbosch, South Africa
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10
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Luo H, Liu Z, Bilal M, Xie F, Zheng P, Yang R, Wang Z. Efficient production of butyric acid by Clostridium tyrobutyricum immobilized in an internal fibrous bed bioreactor (IFBB). Biochem Eng J 2020. [DOI: 10.1016/j.bej.2020.107552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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11
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Luo G, Fujino M, Nakano S, Hida A, Tajima T, Kato J. Accelerating itaconic acid production by increasing membrane permeability of whole-cell biocatalyst based on a psychrophilic bacterium Shewanella livingstonensis Ac10. J Biotechnol 2020; 312:56-62. [DOI: 10.1016/j.jbiotec.2020.03.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 02/21/2020] [Accepted: 03/05/2020] [Indexed: 12/27/2022]
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12
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Techno-Economic Analysis of Bio-Based Lactic Acid Production Utilizing Corn Grain as Feedstock. Processes (Basel) 2020. [DOI: 10.3390/pr8020199] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Lactic acid is an important chemical with numerous commercial applications that can be fermentatively produced from biological feedstocks. Producing lactic acid from corn grain could complement the use of already existing infrastructure for corn grain-based ethanol production with a higher value product. The objective of this study was to evaluate the techno-economic feasibility of producing 100,000 metric tons (t) of lactic acid annually from corn grain in a biorefinery. The study estimated the resources (equipment, raw materials, energy, and labor) requirements and costs to produce lactic acid from bacteria, fungi and yeast-based fermentation pathways. Lactic acid production costs were $1181, $1251 and $844, for bacteria, fungi and yeast, respectively. Genetically engineered yeast strains capable of producing lactic acid at low pH support significantly cheaper processes because they do not require simultaneous neutralization and recovery of lactic acid, resulting in lower requirements for chemical, equipment, and utilities. Lactic acid production costs were highly sensitive to sugar-to-lactic-acid conversion rates, grain price, plant size, annual operation hours, and potential use of gypsum. Improvements in process efficiencies and lower equipment and chemical costs would further reduce the cost of lactic acid production from corn grain.
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Sommerauer L, Grzybek J, Elsaesser MS, Benisek A, Sepperer T, Dachs E, Hüsing N, Petutschnigg A, Tondi G. Furfuryl Alcohol and Lactic Acid Blends: Homo- or Co-Polymerization? Polymers (Basel) 2019; 11:E1533. [PMID: 31547001 PMCID: PMC6835956 DOI: 10.3390/polym11101533] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 09/06/2019] [Accepted: 09/10/2019] [Indexed: 11/17/2022] Open
Abstract
Furfuryl alcohol (FA) and lactic acid (LA) are two of the most interesting biomolecules, easily obtainable from sugars and hence extremely attractive for green chemistry solutions. These substances undergo homopolymerization and they have been rarely considered for copolymerization. Typically, FA homopolymerizes exothermically in an acid environment producing inhomogeneous porous materials, but recent studies have shown that this reaction can be controlled and therefore we have implemented this process to trigger the copolymerization with LA. The mechanical tests have shown that the blend containing small amount of FA were rigid and the fracture showed patterns more similar to the one of neat polyfurfuryl alcohol (PFA). This LA-rich blend exhibited higher chloroform and water resistances, while thermal analyses (TG and DSC) also indicated a higher furanic character than expected. These observations suggested an intimate interconnection between precursors which was highlighted by the presence of a small band in the ester region of the solid state 13C-NMR, even if the FT-IR did not evidence any new signal. These studies show that these bioplastics are basically constituted of PLA and PFA homopolymers with some small portion of covalent bonds between the two moieties.
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Affiliation(s)
- Lukas Sommerauer
- Forest Products Technology & Timber Constructions Department, Salzburg University of Applied Sciences, Marktstraße 136a, 5431 Kuchl, Austria.
| | - Jakub Grzybek
- Forest Products Technology & Timber Constructions Department, Salzburg University of Applied Sciences, Marktstraße 136a, 5431 Kuchl, Austria.
| | - Michael S Elsaesser
- Department of Chemistry and Physics of Materials, Paris-Lodron-University Salzburg, Jakob-Haringer-Strasse 2A, 5020 Salzburg, Austria.
| | - Artur Benisek
- Department of Chemistry and Physics of Materials, Paris-Lodron-University Salzburg, Jakob-Haringer-Strasse 2A, 5020 Salzburg, Austria.
| | - Thomas Sepperer
- Forest Products Technology & Timber Constructions Department, Salzburg University of Applied Sciences, Marktstraße 136a, 5431 Kuchl, Austria.
- Salzburg Center for Smart Materials, Jakob-Haringer-Strasse 2A, 5020 Salzburg, Austria.
| | - Edgar Dachs
- Department of Chemistry and Physics of Materials, Paris-Lodron-University Salzburg, Jakob-Haringer-Strasse 2A, 5020 Salzburg, Austria.
| | - Nicola Hüsing
- Department of Chemistry and Physics of Materials, Paris-Lodron-University Salzburg, Jakob-Haringer-Strasse 2A, 5020 Salzburg, Austria.
| | - Alexander Petutschnigg
- Forest Products Technology & Timber Constructions Department, Salzburg University of Applied Sciences, Marktstraße 136a, 5431 Kuchl, Austria.
| | - Gianluca Tondi
- Forest Products Technology & Timber Constructions Department, Salzburg University of Applied Sciences, Marktstraße 136a, 5431 Kuchl, Austria.
- Salzburg Center for Smart Materials, Jakob-Haringer-Strasse 2A, 5020 Salzburg, Austria.
- Department of Land, Environment, Agriculture & Forestry, University of Padua, Via dell´Universitá 16, 35020 Legnaro, Italy.
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Ashok A, Devarai SK. l-Asparaginase production in rotating bed reactor from Rhizopus microsporus IBBL-2 using immobilized Ca-alginate beads. 3 Biotech 2019; 9:349. [PMID: 31497467 DOI: 10.1007/s13205-019-1883-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 08/24/2019] [Indexed: 11/28/2022] Open
Abstract
The present work reports on the production of extracellular l-asparaginase from Rhizopus microsporus IBBL-2 using submerged fermentation (SmF) process free of glutaminase and urease activities. Primary studies done in shake flask showed that the highest l-asparaginase activity of 12.68 U mL-1 was produced at 72 h with optimized fermentation parameters such as pH 6.0, 4 × 106 fungal cells mL-1, and agitation of 180 rpm at 30 °C using one-factor-at-a-time (OFAT). Different substrates, nitrogen sources, temperature, pH, the initial number of cells and metal ions were tested to determine the impact on enzyme production. l-Asparaginase activity of 17.68 U mL-1 was produced after 48 h using immobilized calcium-alginate (Ca-alginate) cells. 4 × 106 cells mL-1 was entrapped in 3% (W/V) of alginate bead of size 2 mm each at a temperature of 30 °C and pH of 6. The process was optimized using L9 (34) Taguchi Orthogonal Array (OA) technique with a regression coefficient (R 2) value of 0.9709, F value of 33.34 and p value of 0.0025. Scale-up studies involving 200-mL and 1-L rotating bed reactor (RBR) using immobilized beads were done and the results obtained are 20.21 U mL-1 and 19.13 U mL-1, respectively, the increased activity with immobilization accounts for reduced shear on cells due to increased stability as compared to the free-flowing cells.
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Affiliation(s)
- Anup Ashok
- Industrial Bioprocess and Bioprospecting Laboratory (IBBL), Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, Telangana 502285 India
| | - Santhosh Kumar Devarai
- Industrial Bioprocess and Bioprospecting Laboratory (IBBL), Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, Telangana 502285 India
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Romo-Buchelly J, Rodríguez-Torres M, Orozco-Sánchez F. Biotechnological valorization of agro industrial and household wastes for lactic acid production. REVISTA COLOMBIANA DE BIOTECNOLOGÍA 2019. [DOI: 10.15446/rev.colomb.biote.v21n1.69284] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Lactic acid (LA) is an organic compound used in several industries, such as food, textile, chemical, and pharmaceutical. The global interest in this product is due to its use for the synthesis of numerous chemical compounds, including polylactic acid, a biode-gradable thermoplastic and substitute for petroleum-derived plastics. An in-depth overview of the use of industrial and household wastes as inexpensive substrates in order to reduce the cost of LA production is presented. A review is carried out of the biotech-nological aspects that must be taken into account when using some wastes with high transformation potential to produce LA in a submerged culture, as well recommendations for their use. The advantages and disadvantages of different types of treatments used for the transformation of waste into suitable substrates are considered. Several methods of fermentation, as well as genetic strategies for increasing the production, are summarized and compared. It is expected that in a few years there will be many ad-vances in these areas that will allow greater large-scale production of LA using agroindustrial or household wastes, with potential positive economic and environmental impact in some regions of the planet.
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16
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Yuwa-Amornpitak T, Chookietwatana K. Bioconversion of waste cooking oil glycerol from cabbage extract to lactic acid by Rhizopus microsporus. Braz J Microbiol 2018; 49 Suppl 1:178-184. [PMID: 30166270 PMCID: PMC6328839 DOI: 10.1016/j.bjm.2018.06.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 03/20/2018] [Accepted: 06/14/2018] [Indexed: 11/26/2022] Open
Abstract
Glycerol from spent oil was processed by transesterification for biodiesel production. Although glycerol contains many types of impurities, it can be used as a C-source for lactic acid production by fungi, such as Rhizopus microsporus. In this study, we found that wild type R. microsporus (LTH23) produced more lactic acid than the mutant strains on cabbage glycerol media (CG media). More lactic acid was produced on CG media than on cabbage extract media (C media) by about two-fold in batch fermentation conditions. In addition, we found that lactic acid production in a fed-batch process was also slightly higher than in a batch process. To study the combined effects of pH, urea, and glycerol waste concentration on lactic acid production, a response surface methodology was used. The optimum pH, urea, and glycerol waste concentrations were pH 6.5, 3.75g/L, and 17g/L, respectively. The maximum lactic acid production predicted by this equation model was 4.03g/L.
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Affiliation(s)
- Thalisa Yuwa-Amornpitak
- Mahasarakham University, Faculty of Technology, Department of Biotechnology, Khamriang, Kantarawichai, Maha Sarakham 44150, Thailand.
| | - Kannika Chookietwatana
- Mahasarakham University, Faculty of Technology, Department of Biotechnology, Khamriang, Kantarawichai, Maha Sarakham 44150, Thailand
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17
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Biosynthesis of d-lactic acid from lignocellulosic biomass. Biotechnol Lett 2018; 40:1167-1179. [DOI: 10.1007/s10529-018-2588-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 06/25/2018] [Indexed: 11/25/2022]
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18
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Fu Y, Sun X, Zhu H, Jiang R, Luo X, Yin L. An optimized fed-batch culture strategy integrated with a one-step fermentation improves L-lactic acid production by Rhizopus oryzae. World J Microbiol Biotechnol 2018; 34:74. [PMID: 29786118 DOI: 10.1007/s11274-018-2455-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 05/12/2018] [Indexed: 11/26/2022]
Abstract
In previous work, we proposed a novel modified one-step fermentation fed-batch strategy to efficiently generate L-lactic acid (L-LA) using Rhizopus oryzae. In this study, to further enhance efficiency of L-LA production through one-step fermentation in fed-batch cultures, we systematically investigated the initial peptone- and glucose-feeding approaches, including different initial peptone and glucose concentrations and maintained residual glucose levels. Based on the results of this study, culturing R. oryzae with initial peptone and glucose concentrations of 3.0 and 50.0 g/l, respectively, using a fed-batch strategy is an effective approach of producing L-LA through one-step fermentation. Changing the residual glucose had no obvious effect on the generation of L-LA. We determined the maximum LA production and productivity to be 162 g/l and 6.23 g/(l·h), respectively, during the acid production stage. Compared to our previous work, there was almost no change in L-LA production or yield; however, the productivity of L-LA increased by 14.3%.
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Affiliation(s)
- Yongqian Fu
- Institute of Biomass Resources, Taizhou University, Jiaojiang, 318000, Zhejiang, People's Republic of China.
| | - Xiaolong Sun
- Institute of Biomass Resources, Taizhou University, Jiaojiang, 318000, Zhejiang, People's Republic of China
| | - Huayue Zhu
- Institute of Biomass Resources, Taizhou University, Jiaojiang, 318000, Zhejiang, People's Republic of China
| | - Ru Jiang
- Institute of Biomass Resources, Taizhou University, Jiaojiang, 318000, Zhejiang, People's Republic of China
| | - Xi Luo
- Institute of Biomass Resources, Taizhou University, Jiaojiang, 318000, Zhejiang, People's Republic of China
| | - Longfei Yin
- Institute of Biomass Resources, Taizhou University, Jiaojiang, 318000, Zhejiang, People's Republic of China
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19
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Nguyen PQ, Courchesne NMD, Duraj-Thatte A, Praveschotinunt P, Joshi NS. Engineered Living Materials: Prospects and Challenges for Using Biological Systems to Direct the Assembly of Smart Materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1704847. [PMID: 29430725 PMCID: PMC6309613 DOI: 10.1002/adma.201704847] [Citation(s) in RCA: 201] [Impact Index Per Article: 33.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 10/25/2017] [Indexed: 05/20/2023]
Abstract
Vast potential exists for the development of novel, engineered platforms that manipulate biology for the production of programmed advanced materials. Such systems would possess the autonomous, adaptive, and self-healing characteristics of living organisms, but would be engineered with the goal of assembling bulk materials with designer physicochemical or mechanical properties, across multiple length scales. Early efforts toward such engineered living materials (ELMs) are reviewed here, with an emphasis on engineered bacterial systems, living composite materials which integrate inorganic components, successful examples of large-scale implementation, and production methods. In addition, a conceptual exploration of the fundamental criteria of ELM technology and its future challenges is presented. Cradled within the rich intersection of synthetic biology and self-assembling materials, the development of ELM technologies allows the power of biology to be leveraged to grow complex structures and objects using a palette of bio-nanomaterials.
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Affiliation(s)
- Peter Q. Nguyen
- School of Engineering and Applied Sciences, Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138, USA
| | - Noémie-Manuelle Dorval Courchesne
- School of Engineering and Applied Sciences, Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138, USA
| | - Anna Duraj-Thatte
- School of Engineering and Applied Sciences, Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138, USA
| | - Pichet Praveschotinunt
- School of Engineering and Applied Sciences, Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138, USA
| | - Neel S. Joshi
- School of Engineering and Applied Sciences, Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138, USA
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20
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Trakarnpaiboon S, Srisuk N, Piyachomkwan K, Yang ST, Kitpreechavanich V. l-Lactic acid production from liquefied cassava starch by thermotolerant Rhizopus microsporus: Characterization and optimization. Process Biochem 2017. [DOI: 10.1016/j.procbio.2017.08.019] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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21
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Zheng YX, Wang YL, Pan J, Zhang JR, Dai Y, Chen KY. Semi-continuous production of high-activity pectinases by immobilized Rhizopus oryzae using tobacco wastewater as substrate and their utilization in the hydrolysis of pectin-containing lignocellulosic biomass at high solid content. BIORESOURCE TECHNOLOGY 2017; 241:1138-1144. [PMID: 28673517 DOI: 10.1016/j.biortech.2017.06.066] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 06/11/2017] [Accepted: 06/12/2017] [Indexed: 06/07/2023]
Abstract
In this study, highly reactive endo- and exo-polygalacturonases (PGs) were produced from the tobacco industry wastewater using immobilized Rhizopus oryzae. Compared with free cells, immobilized cells increased enzyme activity 2.8-fold and reduced production time to 24h by shake-flask production. Moreover, the immobilized cells enabled the semi-continuous production of enzymes through repeated-batch mode for seven consecutive cycles in a scale-up bioreactor. During the first five cycles, the average endo-PG and exo-PG activities reached 307.5 and 242.6U/ml, respectively. The addition of crude enzyme for the hydrolysis of pectin-containing lignocellulosic biomass under high-gravity conditions increased glucose release 4.2-fold (115.4 vs. 29.0g/L), compared with hydrolysis using cellulase alone. This process achieves the efficient production of pectin-degrading enzymes, provides a cost-effective method for tobacco wastewater treatment, and offers the possibility to obtain fermentable sugars with high-titer from pectin-containing lignocellulosic biomass, which has important potential for the commercial production of bio-fuels.
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Affiliation(s)
- Yu-Xi Zheng
- Chongqing University, Chongqing 400044, China; Research Center for Tobacco Bioengineering and Technology of Chongqing Science and Technology Commission, Chongqing 401147, China; China Tobacco Chongqing Industrial Co. Ltd., Chongqing 400000, China
| | - Yuan-Liang Wang
- Chongqing University, Chongqing 400044, China; Research Center for Tobacco Bioengineering and Technology of Chongqing Science and Technology Commission, Chongqing 401147, China.
| | - Jun Pan
- Chongqing University, Chongqing 400044, China; Research Center for Tobacco Bioengineering and Technology of Chongqing Science and Technology Commission, Chongqing 401147, China
| | - Jian-Rong Zhang
- Research Center for Tobacco Bioengineering and Technology of Chongqing Science and Technology Commission, Chongqing 401147, China
| | - Ya Dai
- China Tobacco Chongqing Industrial Co. Ltd., Chongqing 400000, China
| | - Kun-Yan Chen
- China Tobacco Chongqing Industrial Co. Ltd., Chongqing 400000, China
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22
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Pimtong V, Ounaeb S, Thitiprasert S, Tolieng V, Sooksai S, Boonsombat R, Tanasupawat S, Assabumrungrat S, Thongchul N. Enhanced effectiveness of Rhizopus oryzae by immobilization in a static bed fermentor for l -lactic acid production. Process Biochem 2017. [DOI: 10.1016/j.procbio.2016.09.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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23
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Maslova OV, Sen’ko OV, Stepanov NA, Efremenko EN. Lactic acid production using free cells of bacteria and filamentous fungi and cells immobilized in polyvinyl alcohol cryogel: A comparative analysis of the characteristics of biocatalysts and processes. CATALYSIS IN INDUSTRY 2016. [DOI: 10.1134/s2070050416030089] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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24
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Production of β-glucosidase from wheat bran and glycerol by Aspergillus niger in stirred tank and rotating fibrous bed bioreactors. Process Biochem 2016. [DOI: 10.1016/j.procbio.2016.07.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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25
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Jiang Y, Tang B, Xu Z, Liu K, Xu Z, Feng X, Xu H. Improvement of poly-γ-glutamic acid biosynthesis in a moving bed biofilm reactor by Bacillus subtilis NX-2. BIORESOURCE TECHNOLOGY 2016; 218:360-366. [PMID: 27376835 DOI: 10.1016/j.biortech.2016.06.103] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 06/19/2016] [Accepted: 06/20/2016] [Indexed: 06/06/2023]
Abstract
The production of poly-γ-glutamic acid (γ-PGA) by Bacillus subtilis NX-2 using a moving bed biofilm reactor (MBBR) system was tested for the first time in this study. Polypropylene TL-2 was chosen as a suitable carrier, and γ-PGA concentration of 42.7±0.86g/L and productivity of 0.59±0.06g/(Lh) were obtained in batch fermentation. After application of the strategy of dissolved oxygen (DO)-stat feeding, higher γ-PGA concentration and productivity were achieved than with glucose feedback feeding. Finally, the repeated fed-batch cultures implemented in the MBBR system showed high stability, and the maximal γ-PGA concentration and productivity of 74.2g/L and 1.24g/(Lh) were achieved, respectively. In addition, the promotion of oxygen transfer by an MBBR carrier was well explained by a computational fluid dynamics (CFD) simulation. These results suggest that an MBBR system could be applied to large-scale γ-PGA production.
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Affiliation(s)
- Yongxiang Jiang
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing 211816, China; College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China
| | - Bao Tang
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing 211816, China; College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China
| | - Zongqi Xu
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing 211816, China; College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China
| | - Kun Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing 211816, China; College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China
| | - Zheng Xu
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing 211816, China; College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China
| | - Xiaohai Feng
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing 211816, China; College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China.
| | - Hong Xu
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing 211816, China; College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China
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26
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Fu YQ, Yin LF, Zhu HY, Jiang R. High-efficiency l-lactic acid production by Rhizopus oryzae using a novel modified one-step fermentation strategy. BIORESOURCE TECHNOLOGY 2016; 218:410-417. [PMID: 27393831 DOI: 10.1016/j.biortech.2016.06.127] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 06/28/2016] [Accepted: 06/29/2016] [Indexed: 06/06/2023]
Abstract
In this study, lactic acid fermentation by Rhizopus oryzae was investigated using the two different fermentation strategies of one-step fermentation (OSF) and conventional fermentation (CF). Compared to CF, OSF reduced the demurrage of the production process and increased the production of lactic acid. However, the qp was significantly lower than during CF. Based on analysis of μ, qs and qp, a novel modified OSF strategy was proposed. This strategy aimed to achieve a high final concentration of lactic acid, and a high qp by R. oryzae. In this strategy, the maximum lactic acid concentration and productivity of the lactic acid production stage reached 158g/l and 5.45g/(lh), which were 177% and 366% higher, respectively, than the best results from CF. Importantly, the qp and yield did not decrease. This strategy is a convenient and economical method for l-lactic acid fermentation by R. oryzae.
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Affiliation(s)
- Yong-Qian Fu
- Institute of Biomass Resources, Taizhou University, Jiaojiang 318000, Zhejiang, PR China.
| | - Long-Fei Yin
- Institute of Biomass Resources, Taizhou University, Jiaojiang 318000, Zhejiang, PR China
| | - Hua-Yue Zhu
- Institute of Biomass Resources, Taizhou University, Jiaojiang 318000, Zhejiang, PR China
| | - Ru Jiang
- Institute of Biomass Resources, Taizhou University, Jiaojiang 318000, Zhejiang, PR China
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27
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Zheng Y, Wang Y, Zhang J, Pan J. Using tobacco waste extract in pre-culture medium to improve xylose utilization for l-lactic acid production from cellulosic waste by Rhizopus oryzae. BIORESOURCE TECHNOLOGY 2016; 218:344-50. [PMID: 27376833 DOI: 10.1016/j.biortech.2016.06.071] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 06/17/2016] [Accepted: 06/18/2016] [Indexed: 06/06/2023]
Abstract
The aim of this work was to study the high-titer l-lactic acid production from cellulosic waste using Rhizopus oryzae. The tobacco waste water-extract (TWE) added with 5g/L glucose and 0.1g/L vitamin C was optimized as pre-culture medium for R. oryzae. Results found that compared to traditional pre-culture medium, it improved xylose consumption rate up to 2.12-fold and enhanced l-lactic acid yield up to 1.73-fold. The highest l-lactic acid concentration achieved was 173.5g/L, corresponding to volumetric productivity of 1.45g/Lh and yield of 0.860g/g total reducing sugar in fed-batch fermentation. This process achieves efficient production of polymer-grade l-lactic acid from cellulosic feedstocks, lowers the cost of fungal cell pre-culture and provides a novel way for re-utilization of tobacco waste.
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Affiliation(s)
- Yuxi Zheng
- Bioengineering College, Chongqing University, Chongqing 400044, China; Research Center for Tobacco Bioengineering and Technology, Chongqing Science and Technology Commission, Yubei District, Chongqing 401147, China
| | - Yuanliang Wang
- Bioengineering College, Chongqing University, Chongqing 400044, China; Research Center for Tobacco Bioengineering and Technology, Chongqing Science and Technology Commission, Yubei District, Chongqing 401147, China
| | - Jianrong Zhang
- Research Center for Tobacco Bioengineering and Technology, Chongqing Science and Technology Commission, Yubei District, Chongqing 401147, China
| | - Jun Pan
- Bioengineering College, Chongqing University, Chongqing 400044, China; Research Center for Tobacco Bioengineering and Technology, Chongqing Science and Technology Commission, Yubei District, Chongqing 401147, China.
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28
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Schmutzler K, Kupitz K, Schmid A, Buehler K. Hyperadherence of Pseudomonas taiwanensis VLB120ΔC increases productivity of (S)-styrene oxide formation. Microb Biotechnol 2016; 10:735-744. [PMID: 27411543 PMCID: PMC5481534 DOI: 10.1111/1751-7915.12378] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 06/14/2016] [Accepted: 06/15/2016] [Indexed: 01/11/2023] Open
Abstract
The attachment strength of biofilm microbes is responsible for the adherence of the cells to surfaces and thus is a critical parameter in biofilm processes. In tubular microreactors, aqueous‐air segmented flow ensures an optimal oxygen supply and prevents excessive biofilm growth. However, organisms growing in these systems depend on an adaptation phase of several days, before mature and strong biofilms can develop. This is due to strong interfacial forces. In this study, a hyperadherent mutant of Pseudomonas taiwanensis VLB120ΔCeGFP possessing an engineered cyclic diguanylate metabolism, was applied to a continuous biofilm process for the production of (S)‐styrene oxide. Cells of the mutant P. taiwanensis VLB120ΔCeGFP Δ04710, showing the same specific activity as the wild type, adhered substantially stronger to the substratum. Adaptation to the high interfacial forces was not necessary in these cases. Thereby, 40% higher final product concentrations were achieved and the maximal volumetric productivity of the parent strain was significantly surpassed by P. taiwanensis VLB120ΔCeGFP Δ04710. Applying mutants with strong adhesion in biofilm‐based catalysis opens the door to biological process control in future applications of catalytic biofilms using other industrially relevant strains.
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Affiliation(s)
- Karolin Schmutzler
- Laboratory of Chemical Biotechnology, Department of Biochemical and Chemical Engineering, TU Dortmund University, Emil-Figge-Strasse 66, 44227, Dortmund, Germany.,Department of Solar Materials, Helmholtz-Centre for Environmental Research - UFZ, Permoserstrasse 15, 04318, Leipzig, Germany
| | - Katharina Kupitz
- Laboratory of Chemical Biotechnology, Department of Biochemical and Chemical Engineering, TU Dortmund University, Emil-Figge-Strasse 66, 44227, Dortmund, Germany
| | - Andreas Schmid
- Department of Solar Materials, Helmholtz-Centre for Environmental Research - UFZ, Permoserstrasse 15, 04318, Leipzig, Germany
| | - Katja Buehler
- Department of Solar Materials, Helmholtz-Centre for Environmental Research - UFZ, Permoserstrasse 15, 04318, Leipzig, Germany
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29
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Mg-modified zeolite as a carrier for Lactobacillus rhamnosus in L(+) lactic acid production on distillery wastewater. J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2015.07.035] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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30
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Thitiprasert S, Pimtong V, Kodama K, Sooksai S, Tanasupawat S, Assabumrungrat S, Tolieng V, Thongchul N. Correlative effect of dissolved oxygen and key enzyme inhibitors responsible for l-lactate production by immobilized Rhizopus oryzae NRRL395 cultivated in a static bed bioreactor. Process Biochem 2016. [DOI: 10.1016/j.procbio.2015.11.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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31
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Wang J, Lin M, Xu M, Yang ST. Anaerobic Fermentation for Production of Carboxylic Acids as Bulk Chemicals from Renewable Biomass. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2016; 156:323-361. [DOI: 10.1007/10_2015_5009] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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32
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Wang D, Zhu Z, Wang X, Bustamante M, Xu Y, Liu Y, Liao W. Improving mycelium-bound lipase production by aggregating Rhizopus chinensis on a draft tube in a modified stirred tank fermentor. Process Biochem 2015. [DOI: 10.1016/j.procbio.2015.10.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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33
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Wang Y, Cai D, Chen C, Wang Z, Qin P, Tan T. Efficient magnesium lactate production with in situ product removal by crystallization. BIORESOURCE TECHNOLOGY 2015; 198:658-663. [PMID: 26433791 DOI: 10.1016/j.biortech.2015.09.058] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 09/13/2015] [Accepted: 09/14/2015] [Indexed: 06/05/2023]
Abstract
In this paper, attempts were made to develop an in situ product removal process for magnesium lactate production based on crystallization. The crystallization was conducted at 42°C without seed crystal addition. The product concentration, productivity and yield of fermentation coupled with in situ product removal (ISPR) reached 143 g L(-1), 2.41 g L(-1)h(-1) and 94.3%. In four cycles of crystallization, the average reuse rate of fermentation medium and removal rate of product reached 64.0% and 77.7%. At the same time, ISPR fermentation saved 40% water, 41% inorganic salts and 43% yeast extract (YE) as compared to fed-batch fermentation. The process introduces an effective way to reduce the amount of waste water and the raw material cost in magnesium lactate fermentation.
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Affiliation(s)
- Yong Wang
- National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Di Cai
- National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Changjing Chen
- National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Zheng Wang
- National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Peiyong Qin
- National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Tianwei Tan
- National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China.
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34
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Panesar PS, Kaur S. Bioutilisation of agro-industrial waste for lactic acid production. Int J Food Sci Technol 2015. [DOI: 10.1111/ijfs.12886] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Parmjit S. Panesar
- Biotechnology Research Laboratory; Department of Food Engineering and Technology; Sant Longowal Institute of Engineering and Technology; Longowal 148106 Punjab India
| | - Shubhneet Kaur
- Biotechnology Research Laboratory; Department of Food Engineering and Technology; Sant Longowal Institute of Engineering and Technology; Longowal 148106 Punjab India
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35
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Liaud N, Rosso MN, Fabre N, Crapart S, Herpoël-Gimbert I, Sigoillot JC, Raouche S, Levasseur A. L-lactic acid production by Aspergillus brasiliensis overexpressing the heterologous ldha gene from Rhizopus oryzae. Microb Cell Fact 2015; 14:66. [PMID: 25935554 PMCID: PMC4425913 DOI: 10.1186/s12934-015-0249-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Accepted: 04/23/2015] [Indexed: 11/10/2022] Open
Abstract
Background Lactic acid is the building block of poly-lactic acid (PLA), a biopolymer that could be set to replace petroleum-based plastics. To make lactic acid production cost-effective, the production process should be carried out at low pH, in low-nutrient media, and with a low-cost carbon source. Yeasts have been engineered to produce high levels of lactic acid at low pH from glucose but not from carbohydrate polymers (e.g. cellulose, hemicellulose, starch). Aspergilli are versatile microbial cell factories able to naturally produce large amounts of organic acids at low pH and to metabolize cheap abundant carbon sources such as plant biomass. However, they have never been used for lactic acid production. Results To investigate the feasibility of lactic acid production with Aspergillus, the NAD-dependent lactate dehydrogenase (LDH) responsible for lactic acid production by Rhizopus oryzae was produced in Aspergillus brasiliensis BRFM103. Among transformants, the best lactic acid producer, A. brasiliensis BRFM1877, integrated 6 ldhA gene copies, and intracellular LDH activity was 9.2 × 10−2 U/mg. At a final pH of 1.6, lactic acid titer reached 13.1 g/L (conversion yield: 26%, w/w) at 138 h in glucose-ammonium medium. This extreme pH drop was subsequently prevented by switching nitrogen source from ammonium sulfate to Na-nitrate, leading to a final pH of 3 and a lactic acid titer of 17.7 g/L (conversion yield: 47%, w/w) at 90 h of culture. Final titer was further improved to 32.2 g/L of lactic acid (conversion yield: 44%, w/w) by adding 20 g/L glucose to the culture medium at 96 h. This strain was ultimately able to produce lactic acid from xylose, arabinose, starch and xylan. Conclusion We obtained the first Aspergillus strains able to produce large amounts of lactic acid by inserting recombinant ldhA genes from R. oryzae into a wild-type A. brasiliensis strain. pH regulation failed to significantly increase lactic acid production, but switching nitrogen source and changing culture feed enabled a 1.8-fold increase in conversion yields. The strain produced lactic acid from plant biomass. Our findings make A. brasiliensis a strong contender microorganism for low-pH acid production from various complex substrates, especially hemicellulose.
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Affiliation(s)
- Nadège Liaud
- INRA, UMR1163 Biodiversité et Biotechnologie Fongiques, Polytech' Marseille, 163 avenue de Luminy, CP 925, 13288, Marseille, Cedex 09, France. .,Aix-Marseille Université, UMR1163 Biodiversité et Biotechnologie Fongiques, Polytech' Marseille, 163 avenue de Luminy, CP 925, 13288, Marseille, Cedex 09, France. .,ARD Agro-Industrie Recherche et Développement, Route de Bazancourt, 51110, Pomacle, France.
| | - Marie-Noëlle Rosso
- INRA, UMR1163 Biodiversité et Biotechnologie Fongiques, Polytech' Marseille, 163 avenue de Luminy, CP 925, 13288, Marseille, Cedex 09, France.
| | - Nicolas Fabre
- ARD Agro-Industrie Recherche et Développement, Route de Bazancourt, 51110, Pomacle, France.
| | - Sylvaine Crapart
- ARD Agro-Industrie Recherche et Développement, Route de Bazancourt, 51110, Pomacle, France.
| | - Isabelle Herpoël-Gimbert
- INRA, UMR1163 Biodiversité et Biotechnologie Fongiques, Polytech' Marseille, 163 avenue de Luminy, CP 925, 13288, Marseille, Cedex 09, France. .,Aix-Marseille Université, UMR1163 Biodiversité et Biotechnologie Fongiques, Polytech' Marseille, 163 avenue de Luminy, CP 925, 13288, Marseille, Cedex 09, France.
| | - Jean-Claude Sigoillot
- INRA, UMR1163 Biodiversité et Biotechnologie Fongiques, Polytech' Marseille, 163 avenue de Luminy, CP 925, 13288, Marseille, Cedex 09, France. .,Aix-Marseille Université, UMR1163 Biodiversité et Biotechnologie Fongiques, Polytech' Marseille, 163 avenue de Luminy, CP 925, 13288, Marseille, Cedex 09, France.
| | - Sana Raouche
- INRA, UMR1163 Biodiversité et Biotechnologie Fongiques, Polytech' Marseille, 163 avenue de Luminy, CP 925, 13288, Marseille, Cedex 09, France. .,Aix-Marseille Université, UMR1163 Biodiversité et Biotechnologie Fongiques, Polytech' Marseille, 163 avenue de Luminy, CP 925, 13288, Marseille, Cedex 09, France.
| | - Anthony Levasseur
- Aix-Marseille Université, Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergentes (URMITE), UM63, CNRS 7278, IRD 198, INSERM U1095, IHU Méditerranée Infection, Pôle des Maladies Infectieuses, Assistance Publique-Hôpitaux de Marseille, Faculté de Médecine, 27 Bd Jean Moulin, 13005, Marseille, France.
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Huang J, Dai H, Yan R, Wang P. Enhanced production of butyric acid through immobilization of Clostridium tyrobutyricum in a novel inner disc-shaped matrix bioreactor. ANN MICROBIOL 2015. [DOI: 10.1007/s13213-015-1088-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Li Z, Chen Y, Liu D, Zhao N, Cheng H, Ren H, Guo T, Niu H, Zhuang W, Wu J, Ying H. Involvement of glycolysis/gluconeogenesis and signaling regulatory pathways in Saccharomyces cerevisiae biofilms during fermentation. Front Microbiol 2015; 6:139. [PMID: 25755652 PMCID: PMC4337339 DOI: 10.3389/fmicb.2015.00139] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Accepted: 02/05/2015] [Indexed: 11/16/2022] Open
Abstract
Compared to free (free-living) cells, biofilm cells show increased resistance and stability to high-pressure fermentation conditions, although the reasons underlying these phenomena remain unclear. Here, we investigated biofilm formation with immobilized Saccharomyces cerevisiae cells grown on fiber surfaces during the process of ethanol fermentation. The development of biofilm colonies was visualized by fluorescent labeling and confocal microscopy. RNA from yeast cells at three different biofilm development periods was extracted and sequenced by high-throughput sequencing. We quantitated gene expression differences between biofilm cells and free cells and found that 2098, 1556, and 927 genes were significantly differentially expressed, respectively. We also validated the expression of previously reported genes and identified novel genes and pathways under the control of this system. Statistical analysis revealed that biofilm genes show significant gene expression changes principally in the initial period of biofilm formation compared to later periods. Carbohydrate metabolism, amino acid metabolism, signal transduction, and oxidoreductase activity were needed for biofilm formation. In contrast to previous findings, we observed some differential expression performances of FLO family genes, indicating that cell aggregation in our immobilized fermentation system was possibly independent of flocculation. Cyclic AMP-protein kinase A and mitogen-activated protein kinase pathways regulated signal transduction pathways during yeast biofilm formation. We found that carbohydrate metabolism, especially glycolysis/gluconeogenesis, played a key role in the development of S. cerevisiae biofilms. This work provides an important dataset for future studies aimed at gaining insight into the regulatory mechanisms of immobilized cells in biofilms, as well as for optimizing bioprocessing applications with S. cerevisiae.
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Affiliation(s)
- Zhenjian Li
- National Engineering Research Center for Biotechnology, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University Nanjing, China ; State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University Nanjing, China
| | - Yong Chen
- National Engineering Research Center for Biotechnology, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University Nanjing, China
| | - Dong Liu
- National Engineering Research Center for Biotechnology, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University Nanjing, China
| | - Nan Zhao
- National Engineering Research Center for Biotechnology, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University Nanjing, China
| | - Hao Cheng
- National Engineering Research Center for Biotechnology, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University Nanjing, China
| | - Hengfei Ren
- National Engineering Research Center for Biotechnology, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University Nanjing, China
| | - Ting Guo
- National Engineering Research Center for Biotechnology, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University Nanjing, China
| | - Huanqing Niu
- National Engineering Research Center for Biotechnology, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University Nanjing, China
| | - Wei Zhuang
- National Engineering Research Center for Biotechnology, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University Nanjing, China
| | - Jinglan Wu
- National Engineering Research Center for Biotechnology, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University Nanjing, China
| | - Hanjie Ying
- National Engineering Research Center for Biotechnology, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University Nanjing, China ; State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University Nanjing, China
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Zhang K, Yu C, Yang ST. Effects of soybean meal hydrolysate as the nitrogen source on seed culture morphology and fumaric acid production by Rhizopus oryzae. Process Biochem 2015. [DOI: 10.1016/j.procbio.2014.12.015] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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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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Microorganisms for the Production of Lactic Acid and Organic Lactates. MICROORGANISMS IN BIOREFINERIES 2015. [DOI: 10.1007/978-3-662-45209-7_9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Michelin M, Ruiz HA, Silva DP, Ruzene DS, Teixeira JA, Polizeli MLTM. Cellulose from Lignocellulosic Waste. POLYSACCHARIDES 2015. [DOI: 10.1007/978-3-319-16298-0_52] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
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Chen Y, Han Q, Wang Y, Zhang Q, Qiao X. Synthesis of pyridinium polysiloxane for antibacterial coating in supercritical carbon dioxide. J Appl Polym Sci 2014. [DOI: 10.1002/app.41723] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yong Chen
- Department of Applied Chemistry; College of Chemical & Environmental Engineering, Shandong University of Science and Technology; Qingdao 266590 People's Republic of China
| | - Qiuxia Han
- Department of Biological Engineering; College of Chemical & Environmental Engineering, Shandong University of Science and Technology; Qingdao 266590 People's Republic of China
| | - Yali Wang
- Department of Applied Chemistry; College of Chemical & Environmental Engineering, Shandong University of Science and Technology; Qingdao 266590 People's Republic of China
| | - Qiang Zhang
- Analytical and Testing Center, School of Materials Science and Engineering; Shandong University of Science and Technology; Qingdao 266590 People's Republic of China
| | - Xuxu Qiao
- Department of Applied Chemistry; College of Chemical & Environmental Engineering, Shandong University of Science and Technology; Qingdao 266590 People's Republic of China
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Kareem S, Banjo T. Microbial production of organic acids. Microb Biotechnol 2014. [DOI: 10.1201/b17587-9] [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
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Manipulating Pyruvate Decarboxylase by Addition of Enzyme Regulators during Fermentation of Rhizopus oryzae to Enhance Lactic Acid Production. Appl Biochem Biotechnol 2014; 174:1795-809. [DOI: 10.1007/s12010-014-1155-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2014] [Accepted: 08/15/2014] [Indexed: 11/26/2022]
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Xu Z, Feng X, Zhang D, Tang B, Lei P, Liang J, Xu H. Enhanced poly(γ-glutamic acid) fermentation by Bacillus subtilis NX-2 immobilized in an aerobic plant fibrous-bed bioreactor. BIORESOURCE TECHNOLOGY 2014; 155:8-14. [PMID: 24398186 DOI: 10.1016/j.biortech.2013.12.080] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2013] [Revised: 12/16/2013] [Accepted: 12/18/2013] [Indexed: 05/22/2023]
Abstract
To enhance poly(γ-glutamic acid) (PGA) production, a novel aerobic plant fibrous-bed bioreactor (APFB) was constructed for immobilized fermentation. Based on the analysis of the kinetics of immobilized-cell fermentation using the APFB and conventional free-cell fermentation, immobilized-cell fermentation exhibited more efficient PGA production. Furthermore, repeated fed-batch cultures for PGA production were conducted to evaluate the stability of the APFB system. Average final PGA concentration and productivity of 71.21±0.83g/L and 1.246±0.008g/L/h were respectively achieved by cells immobilized in bagasse during APFB, which was reused eight times over a period of 457±18h. Analysis of the membrane phospholipids and the key enzyme activities indicated that APFB-adapted cells had better productivity than original cells. Thus, this study demonstrated the significant potential of the APFB culture system in future industrial applications.
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Affiliation(s)
- Zongqi Xu
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, PR China; College of Food Science and Light Industry, Nanjing University of Technology, Nanjing 211816, PR China
| | - Xiaohai Feng
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, PR China; College of Food Science and Light Industry, Nanjing University of Technology, Nanjing 211816, PR China.
| | - Dan Zhang
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, PR China; College of Food Science and Light Industry, Nanjing University of Technology, Nanjing 211816, PR China; School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 200240, PR China
| | - Bao Tang
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, PR China; College of Food Science and Light Industry, Nanjing University of Technology, Nanjing 211816, PR China
| | - Peng Lei
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, PR China; College of Food Science and Light Industry, Nanjing University of Technology, Nanjing 211816, PR China
| | - Jinfeng Liang
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, PR China; College of Food Science and Light Industry, Nanjing University of Technology, Nanjing 211816, PR China
| | - Hong Xu
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, PR China; College of Food Science and Light Industry, Nanjing University of Technology, Nanjing 211816, PR China
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Thitiprasert S, Sooksai S, Thongchul N. 1,2-Diazole and 2,2,2-Trifluoroethanol and Their Regulatory Effects on Ethanol and Lactic Acid Formation in the Living Culture of Rhizopus oryzae. Appl Biochem Biotechnol 2013; 172:1673-86. [DOI: 10.1007/s12010-013-0627-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Accepted: 10/30/2013] [Indexed: 10/26/2022]
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Recent advances in lactic acid production by microbial fermentation processes. Biotechnol Adv 2013; 31:877-902. [DOI: 10.1016/j.biotechadv.2013.04.002] [Citation(s) in RCA: 607] [Impact Index Per Article: 55.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2012] [Revised: 04/14/2013] [Accepted: 04/15/2013] [Indexed: 11/18/2022]
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