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de Rosset A, Tyszkiewicz N, Wiśniewski J, Pudełko-Malik N, Rutkowski P, Młynarz P, Pasternak G. Bioelectrochemical synthesis of rhamnolipids and energy production and its correlation with nitrogen in air-cathode microbial fuel cells. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 365:121514. [PMID: 38908152 DOI: 10.1016/j.jenvman.2024.121514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 05/17/2024] [Accepted: 06/16/2024] [Indexed: 06/24/2024]
Abstract
Microbial fuel cells (MFCs) have been recently proven to synthesise biosurfactants from waste products. In classic bioreactors, the efficiency of biosynthesis process can be controlled by the concentration of nitrogen content in the electrolyte. However, it was not known whether a similar control mechanism could be applied in current-generating conditions. In this work, the effect of nitrogen concentration on biosurfactant production from waste cooking oil was investigated. The concentration of NH4Cl in the electrolyte ranged from 0 to 1 g L-1. The maximum power density equal to 17.5 W m-3 was achieved at a concentration of 0.5 g L-1 (C/N = 2.32) and was accompanied by the highest surface tension decrease (to 54.6 mN m-1) and an emulsification activity index of 95.4%. Characterisation of the biosurfactants produced by the LC-MS/MS method showed the presence of eleven compounds belonging to the mono- and di-rhamnolipids group, most likely produced by P. aeruginosa, which was the most abundant (19.6%) in the community. Importantly, we have found a strong correlation (R = -0.96) of power and biosurfactant activity in response to C/N ratio. This study shows that nitrogen plays an important role in the current-generating metabolism of waste cooking oil. To the best of our knowledge, this is the first study where the nitrogen optimisation was investigated to improve the synthesis of biosurfactants and power generation in a bioelectrochemical system.
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Affiliation(s)
- Aleksander de Rosset
- Department of Process Engineering and Technology of Polymer and Carbon Materials, Faculty of Chemistry, Wroclaw University of Science and Technology, Wroclaw, 50-370, Poland
| | - Natalia Tyszkiewicz
- Department of Process Engineering and Technology of Polymer and Carbon Materials, Faculty of Chemistry, Wroclaw University of Science and Technology, Wroclaw, 50-370, Poland; Department of Biochemistry, Molecular Biology and Biotechnology, Faculty of Chemistry, Wroclaw University of Science and Technology, Wroclaw, 50-370, Poland
| | - Jerzy Wiśniewski
- Department of Biochemistry, Molecular Biology and Biotechnology, Faculty of Chemistry, Wroclaw University of Science and Technology, Wroclaw, 50-370, Poland
| | - Natalia Pudełko-Malik
- Department of Biochemistry, Molecular Biology and Biotechnology, Faculty of Chemistry, Wroclaw University of Science and Technology, Wroclaw, 50-370, Poland
| | - Piotr Rutkowski
- Department of Process Engineering and Technology of Polymer and Carbon Materials, Faculty of Chemistry, Wroclaw University of Science and Technology, Wroclaw, 50-370, Poland
| | - Piotr Młynarz
- Department of Biochemistry, Molecular Biology and Biotechnology, Faculty of Chemistry, Wroclaw University of Science and Technology, Wroclaw, 50-370, Poland
| | - Grzegorz Pasternak
- Department of Process Engineering and Technology of Polymer and Carbon Materials, Faculty of Chemistry, Wroclaw University of Science and Technology, Wroclaw, 50-370, Poland.
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Godar AG, Chase T, Conway D, Ravichandran D, Woodson I, Lai YJ, Song K, Rittmann BE, Wang X, Nielsen DR. 'Dark' CO 2 fixation in succinate fermentations enabled by direct CO 2 delivery via hollow fiber membrane carbonation. Bioprocess Biosyst Eng 2024; 47:223-233. [PMID: 38142425 DOI: 10.1007/s00449-023-02957-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 11/26/2023] [Indexed: 12/26/2023]
Abstract
Anaerobic succinate fermentations can achieve high-titer, high-yield performance while fixing CO2 through the reductive branch of the tricarboxylic acid cycle. To provide the needed CO2, conventional media is supplemented with significant (up to 60 g/L) bicarbonate (HCO3-), and/or carbonate (CO32-) salts. However, producing these salts from CO2 and natural ores is thermodynamically unfavorable and, thus, energetically costly, which reduces the overall sustainability of the process. Here, a series of composite hollow fiber membranes (HFMs) were first fabricated, after which comprehensive CO2 mass transfer measurements were performed under cell-free conditions using a novel, constant-pH method. Lumen pressure and total HFM surface area were found to be linearly correlated with the flux and volumetric rate of CO2 delivery, respectively. Novel HFM bioreactors were then constructed and used to comprehensively investigate the effects of modulating the CO2 delivery rate on succinate fermentations by engineered Escherichia coli. Through appropriate tuning of the design and operating conditions, it was ultimately possible to produce up to 64.5 g/L succinate at a glucose yield of 0.68 g/g; performance approaching that of control fermentations with directly added HCO3-/CO32- salts and on par with prior studies. HFMs were further found to demonstrate a high potential for repeated reuse. Overall, HFM-based CO2 delivery represents a viable alternative to the addition of HCO3-/CO32- salts to succinate fermentations, and likely other 'dark' CO2-fixing fermentations.
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Affiliation(s)
- Amanda G Godar
- School of Life Sciences, Arizona State University, Tempe, AZ, USA
| | - Timothy Chase
- School for Engineering of Matter, Transport and Energy, Arizona State University, BDC C499C, Tempe, AZ, 85282, USA
| | - Dalton Conway
- School for Engineering of Matter, Transport and Energy, Arizona State University, BDC C499C, Tempe, AZ, 85282, USA
| | | | - Isaiah Woodson
- School for Engineering of Matter, Transport and Energy, Arizona State University, BDC C499C, Tempe, AZ, 85282, USA
| | - Yen-Jung Lai
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ, USA
| | - Kenan Song
- School of Manufacturing Systems and Networks, Arizona State University, Tempe, AZ, USA
| | - Bruce E Rittmann
- Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ, USA
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, USA
| | - Xuan Wang
- School of Life Sciences, Arizona State University, Tempe, AZ, USA
| | - David R Nielsen
- School for Engineering of Matter, Transport and Energy, Arizona State University, BDC C499C, Tempe, AZ, 85282, USA.
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Dias MAM, Nitschke M. Bacterial-derived surfactants: an update on general aspects and forthcoming applications. Braz J Microbiol 2023; 54:103-123. [PMID: 36662441 PMCID: PMC9857925 DOI: 10.1007/s42770-023-00905-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 01/10/2023] [Indexed: 01/21/2023] Open
Abstract
The search for sustainable alternatives to the production of chemicals using renewable substrates and natural processes has been widely encouraged. Microbial surfactants or biosurfactants are surface-active compounds synthesized by fungi, yeasts, and bacteria. Due to their great metabolic versatility, bacteria are the most traditional and well-known microbial surfactant producers, being Bacillus and Pseudomonas species their typical representatives. To be successfully applied in industry, surfactants need to maintain stability under the harsh environmental conditions present in manufacturing processes; thus, the prospection of biosurfactants derived from extremophiles is a promising strategy to the discovery of novel and useful molecules. Bacterial surfactants show interesting properties suitable for a range of applications in the oil industry, food, agriculture, pharmaceuticals, cosmetics, bioremediation, and more recently, nanotechnology. In addition, they can be synthesized using renewable resources as substrates, contributing to the circular economy and sustainability. The article presents a general and updated review of bacterial-derived biosurfactants, focusing on the potential of some groups that are still underexploited, as well as, recent trends and contributions of these versatile biomolecules to circular bioeconomy and nanotechnology.
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Affiliation(s)
- Marcos André Moura Dias
- grid.11899.380000 0004 1937 0722Departamento de Físico-Química, Instituto de Química de São Carlos, Universidade de São Paulo-USP, Av Trabalhador São Carlense 400, CP 780, CEP 13560-970 São Carlos, SP Brasil
| | - Marcia Nitschke
- Departamento de Físico-Química, Instituto de Química de São Carlos, Universidade de São Paulo-USP, Av Trabalhador São Carlense 400, CP 780, CEP 13560-970, São Carlos, SP, Brasil.
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Stein J, Schlosser N, Bardl B, Peschel G, Meyer F, Kloss F, Rosenbaum MA, Regestein L. Scalable downstream method for the cyclic lipopetide jagaricin. Eng Life Sci 2021; 22:811-817. [PMID: 36514532 PMCID: PMC9731587 DOI: 10.1002/elsc.202100079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 10/15/2021] [Indexed: 12/16/2022] Open
Abstract
Cyclic lipopeptides are substances with a high potential to act as antimicrobial agents. Jagaricin, produced by Janthinobacterium agaricidamnosum DSM 9628 and discovered in 2012, is a new member of this class with promising antifungal properties. However, further experiments to investigate future applications and/or conduct chemical derivatization to change properties and toxicity are impossible due to the limited access to jagaricin. Besides a high jagaricin concentration at the end of the fermentation process, a suitable downstream process is essential to generate appropriate amounts with the desired purity. In contrast to other amphiphilic molecules, jagaricin cannot be separated by foam fractionation since it is mainly attached to the surface of the microbial biomass. This technical report presents an overall process chain consisting of 11 individual steps to generate jagaricin in gram scale with a purity of over 95%.
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Affiliation(s)
- Jakob Stein
- Bio Pilot PlantLeibniz Institute for Natural Product Research and Infection BiologyHans‐Knöll‐InstituteJenaGermany
| | - Nicolas Schlosser
- Bio Pilot PlantLeibniz Institute for Natural Product Research and Infection BiologyHans‐Knöll‐InstituteJenaGermany,Faculty of Biological SciencesFriedrich Schiller University JenaJenaGermany
| | - Bettina Bardl
- Bio Pilot PlantLeibniz Institute for Natural Product Research and Infection BiologyHans‐Knöll‐InstituteJenaGermany
| | - Gundela Peschel
- Bio Pilot PlantLeibniz Institute for Natural Product Research and Infection BiologyHans‐Knöll‐InstituteJenaGermany
| | - Florian Meyer
- Transfer Group Anti‐InfectivesLeibniz Institute for Natural Product Research and Infection BiologyHans‐Knöll‐InstituteJenaGermany
| | - Florian Kloss
- Transfer Group Anti‐InfectivesLeibniz Institute for Natural Product Research and Infection BiologyHans‐Knöll‐InstituteJenaGermany
| | - Miriam A. Rosenbaum
- Bio Pilot PlantLeibniz Institute for Natural Product Research and Infection BiologyHans‐Knöll‐InstituteJenaGermany,Faculty of Biological SciencesFriedrich Schiller University JenaJenaGermany
| | - Lars Regestein
- Bio Pilot PlantLeibniz Institute for Natural Product Research and Infection BiologyHans‐Knöll‐InstituteJenaGermany
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