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Tang Z, Zhang H, Xiong J, Li Y, Luo W. Enhanced iturin a production in a two-compartment biofilm reactor by Bacillus velezensis ND. Front Bioeng Biotechnol 2023; 11:1102786. [PMID: 36741766 PMCID: PMC9893019 DOI: 10.3389/fbioe.2023.1102786] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Accepted: 01/09/2023] [Indexed: 01/20/2023] Open
Abstract
In this study, a two-compartment biofilm reactor was designed for iturin A production. The biofilm reactor consists of a stirred-tank fermentor containing exclusively suspended cells and a packing column where the biofilm is attached. Polyester fiber with sphere shape and rough surfaces was chosen as the carrier of biofilm in packing column. Batch, fed-batch, and repeated-batch fermentation using Bacillus velezensis ND in the biofilm reactor were studied. Compared to conventional suspended cell fermentations, the productivity of iturin A in batch and fed-batch biofilm fermentation were increased by 66.7% and 63.3%, respectively. Maximum itutin A concentration of 6.8 ± 0.1 g/L and productivity of 46.9 ± 0.2 mg/L/h were obtained in fed-batch biofilm fermentation. Repeated-batch fermentation showed high stability, with almost same profile as batch fermentation. After a step-wise temperature control strategy was introduced in the biofilm reactor, productivity of iturin A was increased by 131.9% compared to suspended cell reactor. This superior performance of biofilm reactor confirms that it has great potential in industrial production of iturin A.
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Affiliation(s)
- Zhongmin Tang
- College of Life Sciences, Shihezi University, Shihezi, Xinjiang, China
| | - Huili Zhang
- College of Life Sciences, Shihezi University, Shihezi, Xinjiang, China,*Correspondence: Huili Zhang,
| | - Jie Xiong
- College of Life Sciences, Shihezi University, Shihezi, Xinjiang, China
| | - Yang Li
- College of Life Sciences, Shihezi University, Shihezi, Xinjiang, China
| | - Wei Luo
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
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2
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Carolin C F, Senthil Kumar P, Mohanakrishna G, Hemavathy RV, Rangasamy G, M Aminabhavi T. Sustainable production of biosurfactants via valorisation of industrial wastes as alternate feedstocks. CHEMOSPHERE 2023; 312:137326. [PMID: 36410507 DOI: 10.1016/j.chemosphere.2022.137326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 11/01/2022] [Accepted: 11/17/2022] [Indexed: 06/16/2023]
Abstract
Globally, the rapid increase in the human population has given rise to a variety of industries, which have produced a variety of wastes. Due to their detrimental effects on both human and environmental health, pollutants from industry have taken centre stage among the various types of waste produced. The amount of waste produced has therefore increased the demand for effective waste management. In order to create valuable chemicals for sustainable waste management, trash must be viewed as valuable addition. One of the most environmentally beneficial and sustainable choices is to use garbage to make biosurfactants. The utilization of waste in the production of biosurfactant provides lower processing costs, higher availability of feedstock and environmental friendly product along with its characteristics. The current review focuses on the use of industrial wastes in the creation of sustainable biosurfactants and discusses how biosurfactants are categorized. Waste generation in the fruit industry, agro-based industries, as well as sugar-industry and dairy-based industries is documented. Each waste and wastewater are listed along with its benefits and drawbacks. This review places a strong emphasis on waste management, which has important implications for the bioeconomy. It also offers the most recent scientific literature on industrial waste, including information on the role of renewable feedstock for the production of biosurfactants, as well as the difficulties and unmet research needs in this area.
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Affiliation(s)
- Femina Carolin C
- Department of Biotechnology, Saveetha School of Engineering, SIMATS, Chennai, 602105, India
| | - P Senthil Kumar
- Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, 603110, Tamil Nadu, India; Centre of Excellence in Water Research (CEWAR), Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, 603110, Tamil Nadu, India; School of Engineering, Lebanese American University, Byblos, Lebanon.
| | - Gunda Mohanakrishna
- School of Advanced Sciences, KLE Technological University, Hubballi, Karnataka, 580031, India.
| | - R V Hemavathy
- Department of Biotechnology, Saveetha School of Engineering, SIMATS, Chennai, 602105, India
| | | | - Tejraj M Aminabhavi
- School of Advanced Sciences, KLE Technological University, Hubballi, Karnataka, 580031, India; University Center for Research & Development (UCRD), Chandigarh University, Gharuan, Mohali, 140413, Panjab, India
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3
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Shi Y, Chen T, Shaw P, Wang PY. Manipulating Bacterial Biofilms Using Materiobiology and Synthetic Biology Approaches. Front Microbiol 2022; 13:844997. [PMID: 35875573 PMCID: PMC9301480 DOI: 10.3389/fmicb.2022.844997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 06/13/2022] [Indexed: 11/25/2022] Open
Abstract
Bacteria form biofilms on material surfaces within hours. Biofilms are often considered problematic substances in the fields such as biomedical devices and the food industry; however, they are beneficial in other fields such as fermentation, water remediation, and civil engineering. Biofilm properties depend on their genome and the extracellular environment, including pH, shear stress, and matrices topography, stiffness, wettability, and charges during biofilm formation. These surface properties have feedback effects on biofilm formation at different stages. Due to emerging technology such as synthetic biology and genome editing, many studies have focused on functionalizing biofilm for specific applications. Nevertheless, few studies combine these two approaches to produce or modify biofilms. This review summarizes up-to-date materials science and synthetic biology approaches to controlling biofilms. The review proposed a potential research direction in the future that can gain better control of bacteria and biofilms.
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Affiliation(s)
- Yue Shi
- Oujiang Laboratory, Key Laboratory of Alzheimer’s Disease of Zhejiang Province, Institute of Aging, Wenzhou Medical University, Wenzhou, China
- Shenzhen Key Laboratory of Biomimetic Materials and Cellular Immunomodulation, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Tingli Chen
- Shenzhen Key Laboratory of Biomimetic Materials and Cellular Immunomodulation, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
- College of Life Science, University of Chinese Academy of Sciences, Beijing, China
| | - Peter Shaw
- Oujiang Laboratory, Key Laboratory of Alzheimer’s Disease of Zhejiang Province, Institute of Aging, Wenzhou Medical University, Wenzhou, China
| | - Peng-Yuan Wang
- Oujiang Laboratory, Key Laboratory of Alzheimer’s Disease of Zhejiang Province, Institute of Aging, Wenzhou Medical University, Wenzhou, China
- Shenzhen Key Laboratory of Biomimetic Materials and Cellular Immunomodulation, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
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4
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Gudiña EJ, Teixeira JA. Bacillus licheniformis: The unexplored alternative for the anaerobic production of lipopeptide biosurfactants? Biotechnol Adv 2022; 60:108013. [PMID: 35752271 DOI: 10.1016/j.biotechadv.2022.108013] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 05/27/2022] [Accepted: 06/19/2022] [Indexed: 11/02/2022]
Abstract
Microbial biosurfactants have attracted the attention of researchers and companies for the last decades, as they are considered promising candidates to replace chemical surfactants in numerous applications. Although in the last years, considerable advances were performed regarding strain engineering and the use of low-cost substrates in order to reduce their production costs, one of the main bottlenecks is their production at industrial scale. Conventional aerobic biosurfactant production processes result in excessive foaming, due to the use of high agitation and aeration rates necessary to increase dissolved oxygen concentration to allow microbial growth and biosurfactant production. Different approaches have been studied to overcome this problem, although with limited success. A not widely explored alternative is the development of foam-free processes through the anaerobic growth of biosurfactant-producing microorganisms. Surfactin, produced by Bacillus subtilis, is the most widely studied lipopeptide biosurfactant, and the most powerful biosurfactant known so far. Bacillus licheniformis strains produce lichenysin, a lipopeptide biosurfactant which structure is similar to surfactin. However, despite its extraordinary surface-active properties and potential applications, lichenysin has been scarcely studied. According to previous studies, B. licheniformis is better adapted to anaerobic growth than B. subtilis, and could be a good alternative for the anaerobic production of lipopeptide biosurfactants. In this review, the potential and limitations of surfactin and lichenysin production under anaerobic conditions will be analyzed, and the possibility of implementing foam-free processes for lichenysin production, in order to expand the market and applications of biosurfactants in different fields, will be discussed.
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Affiliation(s)
- Eduardo J Gudiña
- CEB - Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal; LABBELS - Associate Laboratory, Braga/Guimarães, Portugal.
| | - José A Teixeira
- CEB - Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal; LABBELS - Associate Laboratory, Braga/Guimarães, Portugal
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Valdés-Velasco LM, Favela-Torres E, Théatre A, Arguelles-Arias A, Saucedo-Castañeda JG, Jacques P. Relationship between lipopeptide biosurfactant and primary metabolite production by Bacillus strains in solid-state and submerged fermentation. BIORESOURCE TECHNOLOGY 2022; 345:126556. [PMID: 34923080 DOI: 10.1016/j.biortech.2021.126556] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 12/07/2021] [Accepted: 12/08/2021] [Indexed: 06/14/2023]
Abstract
The relationship between lipopeptide and primary metabolite production by Bacillus spp. in solid-state fermentation (SSF) and submerged fermentation (SmF) was evaluated. Four wild-type strains and one mutant strain (unable to develop biofilm) were assessed in SSF and SmF, using a defined medium and polyurethane foam as inert support for SSF. Strain ATCC 21,332 in SSF presented the highest lipopeptide production. The wild-type strains revealed higher lipopeptide and biomass production and lower synthesis of primary metabolites in SSF than in SmF. However, the mutant strain showed a slightly higher production of primary metabolites in SSF than in SmF. Carbon balance analysis showed that the carbon flux was mainly directed to lipopeptides in SSF, whereas in SmF, it was directed to the production of primary metabolites and the carbon flux to lipopeptides is inversely related to primary metabolites in both types of cultures.
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Affiliation(s)
- Luisa Marcela Valdés-Velasco
- Department of Biotechnology, Universidad Autonoma Metropolitana, Unidad Iztapalapa, Avenida San Rafael Atlixco 186, Colonia Vicentina, 09340, Mexico City, Mexico
| | - Ernesto Favela-Torres
- Department of Biotechnology, Universidad Autonoma Metropolitana, Unidad Iztapalapa, Avenida San Rafael Atlixco 186, Colonia Vicentina, 09340, Mexico City, Mexico.
| | - Ariane Théatre
- Microbial Processes and Interactions, TERRA Teaching and Research Centre, Joint Research Unit BioEcoAgro, UMRt 1158, Gembloux Agro-Bio Tech, University of Liège, Avenue de la Faculté d́ Agronomie, 2B, B-5030 Gembloux, Belgium
| | - Anthony Arguelles-Arias
- Microbial Processes and Interactions, TERRA Teaching and Research Centre, Joint Research Unit BioEcoAgro, UMRt 1158, Gembloux Agro-Bio Tech, University of Liège, Avenue de la Faculté d́ Agronomie, 2B, B-5030 Gembloux, Belgium
| | - Jesús Gerardo Saucedo-Castañeda
- Department of Biotechnology, Universidad Autonoma Metropolitana, Unidad Iztapalapa, Avenida San Rafael Atlixco 186, Colonia Vicentina, 09340, Mexico City, Mexico
| | - Philippe Jacques
- Microbial Processes and Interactions, TERRA Teaching and Research Centre, Joint Research Unit BioEcoAgro, UMRt 1158, Gembloux Agro-Bio Tech, University of Liège, Avenue de la Faculté d́ Agronomie, 2B, B-5030 Gembloux, Belgium
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6
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Process Development in Biosurfactant Production. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2022; 181:195-233. [DOI: 10.1007/10_2021_195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Théatre A, Cano-Prieto C, Bartolini M, Laurin Y, Deleu M, Niehren J, Fida T, Gerbinet S, Alanjary M, Medema MH, Léonard A, Lins L, Arabolaza A, Gramajo H, Gross H, Jacques P. The Surfactin-Like Lipopeptides From Bacillus spp.: Natural Biodiversity and Synthetic Biology for a Broader Application Range. Front Bioeng Biotechnol 2021; 9:623701. [PMID: 33738277 PMCID: PMC7960918 DOI: 10.3389/fbioe.2021.623701] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 02/02/2021] [Indexed: 11/21/2022] Open
Abstract
Surfactin is a lipoheptapeptide produced by several Bacillus species and identified for the first time in 1969. At first, the biosynthesis of this remarkable biosurfactant was described in this review. The peptide moiety of the surfactin is synthesized using huge multienzymatic proteins called NonRibosomal Peptide Synthetases. This mechanism is responsible for the peptide biodiversity of the members of the surfactin family. In addition, on the fatty acid side, fifteen different isoforms (from C12 to C17) can be incorporated so increasing the number of the surfactin-like biomolecules. The review also highlights the last development in metabolic modeling and engineering and in synthetic biology to direct surfactin biosynthesis but also to generate novel derivatives. This large set of different biomolecules leads to a broad spectrum of physico-chemical properties and biological activities. The last parts of the review summarized the numerous studies related to the production processes optimization as well as the approaches developed to increase the surfactin productivity of Bacillus cells taking into account the different steps of its biosynthesis from gene transcription to surfactin degradation in the culture medium.
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Affiliation(s)
- Ariane Théatre
- Microbial Processes and Interactions, TERRA Teaching and Research Centre, Joint Research Unit BioEcoAgro, UMRt 1158, Gembloux Agro-Bio Tech, University of Liège, Avenue de la Faculté, Gembloux, Belgium
| | - Carolina Cano-Prieto
- Department of Pharmaceutical Biology, Pharmaceutical Institute, Eberhard Karls Universität Tübingen, Tübingen, Germany
| | - Marco Bartolini
- Laboratory of Physiology and Genetics of Actinomycetes, Instituto de Biología Molecular y Celular de Rosario (IBR-CONICET), Facultad de Ciencias, Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Rosario, Argentina
| | - Yoann Laurin
- Laboratoire de Biophysique Moléculaire aux Interfaces, TERRA Teaching and Research Centre, Joint Research Unit BioEcoAgro, UMRt 1158, Gembloux Agro-Bio Tech, Université de Liège, Gembloux, Belgium.,Unité de Génie Enzymatique et Cellulaire UMR 7025 CNRS, Université de Picardie Jules Verne, Amiens, France
| | - Magali Deleu
- Laboratoire de Biophysique Moléculaire aux Interfaces, TERRA Teaching and Research Centre, Joint Research Unit BioEcoAgro, UMRt 1158, Gembloux Agro-Bio Tech, Université de Liège, Gembloux, Belgium
| | - Joachim Niehren
- Inria Lille, and BioComputing Team of CRISTAL Lab (CNRS UMR 9189), Lille, France
| | - Tarik Fida
- Department of Pharmaceutical Biology, Pharmaceutical Institute, Eberhard Karls Universität Tübingen, Tübingen, Germany
| | - Saïcha Gerbinet
- Chemical Engineering, Products, Environment, and Processes, University of Liège, Liège, Belgium
| | - Mohammad Alanjary
- Bioinformatics Group, Wageningen University, Wageningen, Netherlands
| | - Marnix H Medema
- Bioinformatics Group, Wageningen University, Wageningen, Netherlands
| | - Angélique Léonard
- Chemical Engineering, Products, Environment, and Processes, University of Liège, Liège, Belgium
| | - Laurence Lins
- Laboratoire de Biophysique Moléculaire aux Interfaces, TERRA Teaching and Research Centre, Joint Research Unit BioEcoAgro, UMRt 1158, Gembloux Agro-Bio Tech, Université de Liège, Gembloux, Belgium
| | - Ana Arabolaza
- Laboratory of Physiology and Genetics of Actinomycetes, Instituto de Biología Molecular y Celular de Rosario (IBR-CONICET), Facultad de Ciencias, Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Rosario, Argentina
| | - Hugo Gramajo
- Laboratory of Physiology and Genetics of Actinomycetes, Instituto de Biología Molecular y Celular de Rosario (IBR-CONICET), Facultad de Ciencias, Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Rosario, Argentina
| | - Harald Gross
- Department of Pharmaceutical Biology, Pharmaceutical Institute, Eberhard Karls Universität Tübingen, Tübingen, Germany
| | - Philippe Jacques
- Microbial Processes and Interactions, TERRA Teaching and Research Centre, Joint Research Unit BioEcoAgro, UMRt 1158, Gembloux Agro-Bio Tech, University of Liège, Avenue de la Faculté, Gembloux, Belgium
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8
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Park SA, Bhatia SK, Park HA, Kim SY, Sudheer PDVN, Yang YH, Choi KY. Bacillus subtilis as a robust host for biochemical production utilizing biomass. Crit Rev Biotechnol 2021; 41:827-848. [PMID: 33622141 DOI: 10.1080/07388551.2021.1888069] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Bacillus subtilis is regarded as a suitable host for biochemical production owing to its excellent growth and bioresource utilization characteristics. In addition, the distinct endogenous metabolic pathways and the suitability of the heterologous pathways have made B. subtilis a robust and promising host for producing biochemicals, such as: bioalcohols; bioorganic acids (lactic acids, α-ketoglutaric acid, and γ-aminobutyric acid); biopolymers (poly(γ-glutamic acid, polyhydroxyalkanoates (PHA), and polysaccharides and monosaccharides (N-acetylglucosamine, xylooligosaccharides, and hyaluronic acid)); and bioflocculants. Also for producing oligopeptides and functional peptides, owing to its efficient protein secretion system. Several metabolic and genetic engineering techniques, such as target gene overexpression and inactivation of bypass pathways, have led to the improvement in production titers and product selectivity. In this review article, recent progress in the utilization of robust B. subtilis-based host systems for biomass conversion and biochemical production has been highlighted, and the prospects of such host systems are suggested.
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Affiliation(s)
- Seo A Park
- Department of Environmental Engineering, College of Engineering, Ajou University, Suwon, South Korea
| | - Shashi Kant Bhatia
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea.,Institute for Ubiquitous Information Technology and Application, Konkuk University, Seoul, Republic of Korea
| | - Hyun A Park
- Department of Environmental Engineering, College of Engineering, Ajou University, Suwon, South Korea
| | - Seo Yeong Kim
- Department of Environmental Engineering, College of Engineering, Ajou University, Suwon, South Korea
| | | | - Yung-Hun Yang
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea.,Institute for Ubiquitous Information Technology and Application, Konkuk University, Seoul, Republic of Korea
| | - Kwon-Young Choi
- Department of Environmental Engineering, College of Engineering, Ajou University, Suwon, South Korea.,Department of Environmental and Safety Engineering, College of Engineering, Ajou University, Suwon, South Korea
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Théatre A, Hoste ACR, Rigolet A, Benneceur I, Bechet M, Ongena M, Deleu M, Jacques P. Bacillus sp.: A Remarkable Source of Bioactive Lipopeptides. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2021; 181:123-179. [DOI: 10.1007/10_2021_182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Banat IM, Carboué Q, Saucedo-Castañeda G, de Jesús Cázares-Marinero J. Biosurfactants: The green generation of speciality chemicals and potential production using Solid-State fermentation (SSF) technology. BIORESOURCE TECHNOLOGY 2021; 320:124222. [PMID: 33171346 DOI: 10.1016/j.biortech.2020.124222] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 09/30/2020] [Accepted: 10/02/2020] [Indexed: 05/11/2023]
Abstract
Surfactants are multipurpose products found in most sectors of contemporary industry. Their large-scale manufacturing has been mainly carried out using traditional chemical processes. Some of the chemical species involved in their production are considered hazardous and some industrial processes employing them categorised as "having potential negative impact on the environment". Biological surfactants have therefore been generally accepted worldwide as suitable sustainable greener alternatives. Biosurfactants exhibit the same functionalities of synthetic analogues while having the ability to synergize with other molecules improving performances; this strengthens the possibility of reaching different markets via innovative formulations. Recently, their use was suggested to help combat Covid-19. In this review, an analysis of recent bibliography is presented with descriptions, statistics, classifications, applications, advantages, and challenges; evincing the reasons why biosurfactants can be considered as the chemical specialities of the future. Finally, the uses of the solid-state fermentation as a production technology for biosurfactants is presented.
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Affiliation(s)
- Ibrahim M Banat
- School of Biomedical Sciences, University of Ulster, Coleraine BT52 1SA, UK.
| | - Quentin Carboué
- Department of Biotechnology, Metropolitan Autonomous University-Iztapalapa, Av. San Rafael Atlixco 186, Col. Vicentina, Del. Iztapalapa, 09340 Mexico City, Mexico
| | - Gerardo Saucedo-Castañeda
- Department of Biotechnology, Metropolitan Autonomous University-Iztapalapa, Av. San Rafael Atlixco 186, Col. Vicentina, Del. Iztapalapa, 09340 Mexico City, Mexico
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Brück HL, Coutte F, Dhulster P, Gofflot S, Jacques P, Delvigne F. Growth Dynamics of Bacterial Populations in a Two-Compartment Biofilm Bioreactor Designed for Continuous Surfactin Biosynthesis. Microorganisms 2020; 8:microorganisms8050679. [PMID: 32392736 PMCID: PMC7285194 DOI: 10.3390/microorganisms8050679] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 04/28/2020] [Accepted: 05/01/2020] [Indexed: 11/16/2022] Open
Abstract
Biofilm bioreactors are promising systems for continuous biosurfactant production since they provide process stability through cell immobilization and avoid foam formation. In this work, a two-compartment biofilm bioreactor was designed consisting of a stirred tank reactor and a trickle-bed reactor containing a structured metal packing for biofilm formation. A strong and poor biofilm forming B. subtilis 168 strain due to restored exopolysaccharides (EPS) production or not were cultivated in the system to study the growth behavior of the planktonic and biofilm population for the establishment of a growth model. A high dilution rate was used in order to promote biofilm formation on the packing and wash out unwanted planktonic cells. Biofilm development kinetics on the packing were assessed through a total organic carbon mass balance. The EPS+ strain showed a significantly improved performance in terms of adhesion capacity and surfactin production. The mean surfactin productivity of the EPS+ strain was about 37% higher during the continuous cultivation compared to the EPS- strain. The substrate consumption together with the planktonic cell and biofilm development were properly predicted by the model (α = 0.05). The results show the efficiency of the biofilm bioreactor for continuous surfactin production using an EPS producing strain.
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Affiliation(s)
- Hannah Luise Brück
- MiPI, TERRA Teaching and Research Centre, Joint Research Unit BioEcoAgro N° 1158, Gembloux Agro-Bio Tech, University Liège, University Lille, INRAE, UPJV, YNCREA, University Artois, University Littoral Côte d’Opale, B-5030 Gembloux, Belgium; (H.L.B.); (P.J.)
- ICV—Institut Charles Viollette, Joint Research Unit BioEcoAgro N° 1158, University Lille, INRAE, University Liège, UPJV, YNCREA, University Artois, University Littoral Côte d’Opale, F-59000 Lille, France; (F.C.); (P.D.)
| | - François Coutte
- ICV—Institut Charles Viollette, Joint Research Unit BioEcoAgro N° 1158, University Lille, INRAE, University Liège, UPJV, YNCREA, University Artois, University Littoral Côte d’Opale, F-59000 Lille, France; (F.C.); (P.D.)
| | - Pascal Dhulster
- ICV—Institut Charles Viollette, Joint Research Unit BioEcoAgro N° 1158, University Lille, INRAE, University Liège, UPJV, YNCREA, University Artois, University Littoral Côte d’Opale, F-59000 Lille, France; (F.C.); (P.D.)
| | - Sébastien Gofflot
- Walloon Agricultural Research Center (CRA-W), Agricultural Product Technology Unit, Chaussée de Namur, 24, B-5030 Gembloux, Belgium;
| | - Philippe Jacques
- MiPI, TERRA Teaching and Research Centre, Joint Research Unit BioEcoAgro N° 1158, Gembloux Agro-Bio Tech, University Liège, University Lille, INRAE, UPJV, YNCREA, University Artois, University Littoral Côte d’Opale, B-5030 Gembloux, Belgium; (H.L.B.); (P.J.)
| | - Frank Delvigne
- MiPI, TERRA Teaching and Research Centre, Joint Research Unit BioEcoAgro N° 1158, Gembloux Agro-Bio Tech, University Liège, University Lille, INRAE, UPJV, YNCREA, University Artois, University Littoral Côte d’Opale, B-5030 Gembloux, Belgium; (H.L.B.); (P.J.)
- Correspondence:
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