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Halobacterium salinarum NRC-1 Sustains Voltage Production in a Dual-Chambered Closed Microbial Fuel Cell. ScientificWorldJournal 2022; 2022:3885745. [PMID: 36132437 PMCID: PMC9484973 DOI: 10.1155/2022/3885745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 06/24/2022] [Accepted: 08/18/2022] [Indexed: 12/03/2022] Open
Abstract
Sustained bioenergy production from organisms that thrive in high salinity, low oxygen, and low nutrition levels is useful in monitoring hypersaline polluted environments. Microbial fuel cell (MFC) studies utilizing single species halophiles under salt concentrations higher than 1 M and as a closed microbial system are limited. The current study aimed to establish baseline voltage, current, and power density from a dual-chambered MFC utilizing the halophile Halobacterium salinarum NRC-1. MFC performance was determined with two different electrode sizes (5 cm2 and 10 cm2), under oscillating and nonoscillating conditions, as well as in a stacked series. A closed dual-chamber MFC system of 100 mL capacity was devised with Halobacterium media (4.3 M salt concentration) as both anolyte and catholyte, with H. salinarum NRC-1 being the anodic organism. The MFC measured electrical output over 7, 14, 28, and 42 days. MFC output increased with 5 cm2 sized electrodes under nonoscillating (p < 0.0001) relative to oscillating conditions. However, under oscillating conditions, doubling the electrode size increased MFC output significantly (p = 0.01). The stacked series MFC, with an electrode size of 10 cm2, produced the highest power density (1.2672 mW/m2) over 14 days under oscillation. Our results highlight the potentiality of H. salinarum as a viable anodic organism to produce sustained voltage in a closed-MFC system.
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2
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Avci O, Büyüksünetçi YT, Güley Z, Anik Ü. L. Lactis
Subsp
. Lactis
of Cheese Origin Based Microbial Fuel Cell. ChemistrySelect 2021. [DOI: 10.1002/slct.202102229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Okan Avci
- Mugla Sitki Kocman University Faculty of Science Chemistry Department 48000- Kotekli, Mugla Turkey
| | - Yudum T. Büyüksünetçi
- Mugla Sitki Kocman University Faculty of Science Chemistry Department 48000- Kotekli, Mugla Turkey
| | - Ziba Güley
- Alanya Alaaddin Keykubat University Rafet Kayıs Engineering Faculty Department of Food Engineering 07425- Alanya, Antalya Turkey
| | - Ülkü Anik
- Mugla Sitki Kocman University Faculty of Science Chemistry Department 48000- Kotekli, Mugla Turkey
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3
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Nath D, Das S, Ghangrekar MM. High throughput techniques for the rapid identification of electroactive microorganisms. CHEMOSPHERE 2021; 285:131489. [PMID: 34265713 DOI: 10.1016/j.chemosphere.2021.131489] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 06/20/2021] [Accepted: 07/06/2021] [Indexed: 02/08/2023]
Abstract
Electroactive microorganisms (EAM), capable of executing extracellular electron transfer (EET) in/out of a cell, are employed in microbial electrochemical technologies (MET) and bioelectronics for harnessing electricity from wastewater, bioremediation and as biosensors. Thus, investigation on EAM is becoming a topic of interest for multidisciplinary areas, such as environmental science, energy and health sectors. Though, EAM are widespread in three domains of life, nevertheless, only a few hundred EAM have been identified so far and hence, the rapid identification of EAM is imperative. In this review, the techniques that are developed for the direct identification of EAM, such as azo dye and WO3 based techniques, dielectrophoresis, potentiostatic/galvanometric techniques, and other indirect methods, such as spectroscopy and molecular biology techniques, are highlighted with a special focus on time required for the detection of these EAM. The bottlenecks for identifying EAM and the knowledge gaps based on the present investigations are also discussed. Thus, this review is intended to encourage researchers for devolving high-throughput techniques for identifying EAM with more accuracy, while consuming less time.
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Affiliation(s)
- Dibyojyoty Nath
- School of Environmental Science & Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Sovik Das
- Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - M M Ghangrekar
- School of Environmental Science & Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India; Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India.
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4
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Avcı O, Büyüksünetçi YT, Erden E, Timur S, Anık Ü. Pseudomonas fragi/graphene–gold hybrid nanomaterial bioanode based microbial fuel cell. NEW J CHEM 2021. [DOI: 10.1039/d1nj01108a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Pseudomonas fragi (P. fragi) and graphene–gold hybrid nanomaterial included a carbon felt electrode (graphene–Au/CFE) bioanode was developed and optimized.
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Affiliation(s)
- Okan Avcı
- Mugla Sitki Kocman University
- Faculty of Science, Chemistry Department
- Mugla
- Turkey
| | | | - Emre Erden
- Ege University
- Faculty of Science
- Department of Biochemistry
- Izmir
- Turkey
| | - Suna Timur
- Ege University
- Faculty of Science
- Department of Biochemistry
- Izmir
- Turkey
| | - Ülkü Anık
- Mugla Sitki Kocman University
- Faculty of Science, Chemistry Department
- Mugla
- Turkey
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5
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Voinova V, Bonartseva G, Bonartsev A. Effect of poly(3-hydroxyalkanoates) as natural polymers on mesenchymal stem cells. World J Stem Cells 2019; 11:764-786. [PMID: 31692924 PMCID: PMC6828591 DOI: 10.4252/wjsc.v11.i10.764] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Revised: 05/17/2019] [Accepted: 08/27/2019] [Indexed: 02/06/2023] Open
Abstract
Mesenchymal stem cells (MSCs) are stromal multipotent stem cells that can differentiate into multiple cell types, including fibroblasts, osteoblasts, chondrocytes, adipocytes, and myoblasts, thus allowing them to contribute to the regeneration of various tissues, especially bone tissue. MSCs are now considered one of the most promising cell types in the field of tissue engineering. Traditional petri dish-based culture of MSCs generate heterogeneity, which leads to inconsistent efficacy of MSC applications. Biodegradable and biocompatible polymers, poly(3-hydroxyalkanoates) (PHAs), are actively used for the manufacture of scaffolds that serve as carriers for MSC growth. The growth and differentiation of MSCs grown on PHA scaffolds depend on the physicochemical properties of the polymers, the 3D and surface microstructure of the scaffolds, and the biological activity of PHAs, which was discovered in a series of investigations. The mechanisms of the biological activity of PHAs in relation to MSCs remain insufficiently studied. We suggest that this effect on MSCs could be associated with the natural properties of bacteria-derived PHAs, especially the most widespread representative poly(3-hydroxybutyrate) (PHB). This biopolymer is present in the bacteria of mammalian microbiota, whereas endogenous poly(3-hydroxybutyrate) is found in mammalian tissues. The possible association of PHA effects on MSCs with various biological functions of poly(3-hydroxybutyrate) in bacteria and eukaryotes, including in humans, is discussed in this paper.
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Affiliation(s)
- Vera Voinova
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow 119234, Russia
| | - Garina Bonartseva
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia
| | - Anton Bonartsev
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow 119234, Russia
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia
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6
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Pepè Sciarria T, Arioli S, Gargari G, Mora D, Adani F. Monitoring microbial communities' dynamics during the start-up of microbial fuel cells by high-throughput screening techniques. ACTA ACUST UNITED AC 2019; 21:e00310. [PMID: 30805299 PMCID: PMC6374581 DOI: 10.1016/j.btre.2019.e00310] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 01/08/2019] [Accepted: 01/17/2019] [Indexed: 12/30/2022]
Abstract
Microbial Electrochemical Technologies are based on the use of electrochemically active microorganisms that can carry out extracellular electron transfer to an electrode while they are oxidizing the organic compounds. The dynamics and changes of the bacterial community in the anode biofilm and planktonic broth of an acetate fed batch single chamber air cathode MFC have been studied by combing flow-cytometry and Illumina sequencing techniques. At the beginning of the test, from 0 h to 70 h, microbial planktonic communities changed from four groups to two groups, as revealed by DNA content, and from three groups to one group based on the cell membrane polarization revealed by a DiOC6(3) probe. Between 4th day and 13th day, microbial communities changed from one group to a maximum of three groups, monitoring DNA content, and from one group to two based on the cell membrane polarization. The 16S rDNA gene profiling confirmed the shift in microbial communities, with Acinetobacter (39.34%), Azospirillum (27.66%), Arcobacter (4.17%) and Comamonas (2.62%) being the most abundant genera at the beginning of MFC activation. After 70 h the main genera detected were Azospirillum (46.42%), Acinetobacter (34.66%), Enterococcus (2.32%), Dysgonomonas (2.14%). Data obtained have shown that flow cytometry and illumina sequencing are useful tools to monitor "online" the changes in microbial communities during the MFCs start-up and the increase of Azospirillum and Acinetobacter genera is in good agreement with the MFC voltage generation. Moreover, monitoring planktonic populations, instead of the less accessible anode biofilm, was in good agreement with the evolution of MFC voltage.
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Affiliation(s)
- Tommy Pepè Sciarria
- Gruppo Ricicla, Department of Agriculture and Environmental Science, University of Milan, Milano, Italy
| | - Stefania Arioli
- Department of Food Environmental and Nutritional Sciences, University of Milan, Milano, Italy
| | - Giorgio Gargari
- Department of Food Environmental and Nutritional Sciences, University of Milan, Milano, Italy
| | - Diego Mora
- Department of Food Environmental and Nutritional Sciences, University of Milan, Milano, Italy
| | - Fabrizio Adani
- Gruppo Ricicla, Department of Agriculture and Environmental Science, University of Milan, Milano, Italy
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7
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Zarabadi MP, Charette SJ, Greener J. Flow-Based Deacidification of Geobacter sulfurreducens
Biofilms Depends on Nutrient Conditions: a Microfluidic Bioelectrochemical Study. ChemElectroChem 2018. [DOI: 10.1002/celc.201800968] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mir Pouyan Zarabadi
- Département de Chimie Faculté des sciences et de génie; Université Laval; Québec City, QC Canada
| | - Steve J. Charette
- Institut de Biologie Intégrative et des Systèmes; Université Laval; Québec City, QC Canada
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec; Québec City, QC Canada
- Département de biochimie, de microbiologie et de bio-informatique, Faculté des sciences et de génie; Université Laval; Québec City, QC Canada
| | - Jesse Greener
- Département de Chimie Faculté des sciences et de génie; Université Laval; Québec City, QC Canada
- CHU de Québec centre de recherche; Université Laval; 10 rue de l'Espinay Québec, QC Canada
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8
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Riedl S, Brown RK, Klöckner S, Huber KJ, Bunk B, Overmann J, Schröder U. Successive Conditioning in Complex Artificial Wastewater Increases the Performance of Electrochemically Active Biofilms Treating Real Wastewater. ChemElectroChem 2017. [DOI: 10.1002/celc.201700929] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Sebastian Riedl
- Institute of Environmental and Sustainable Chemistry; Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Germany
| | - Robert Keith Brown
- Institute of Environmental and Sustainable Chemistry; Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Germany
| | - Sarah Klöckner
- Institute of Environmental and Sustainable Chemistry; Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Germany
| | - Katharina J. Huber
- The Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures; Inhoffenstraße 7B 38124 Braunschweig Germany
| | - Boyke Bunk
- The Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures; Inhoffenstraße 7B 38124 Braunschweig Germany
| | - Jörg Overmann
- The Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures; Inhoffenstraße 7B 38124 Braunschweig Germany
| | - Uwe Schröder
- Institute of Environmental and Sustainable Chemistry; Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Germany
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9
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Hari AR, Venkidusamy K, Katuri KP, Bagchi S, Saikaly PE. Temporal Microbial Community Dynamics in Microbial Electrolysis Cells - Influence of Acetate and Propionate Concentration. Front Microbiol 2017; 8:1371. [PMID: 28775719 PMCID: PMC5517442 DOI: 10.3389/fmicb.2017.01371] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Accepted: 07/05/2017] [Indexed: 11/13/2022] Open
Abstract
Microbial electrolysis cells (MECs) are widely considered as a next generation wastewater treatment system. However, fundamental insight on the temporal dynamics of microbial communities associated with MEC performance under different organic types with varied loading concentrations is still unknown, nevertheless this knowledge is essential for optimizing this technology for real-scale applications. Here, the temporal dynamics of anodic microbial communities associated with MEC performance was examined at low (0.5 g COD/L) and high (4 g COD/L) concentrations of acetate or propionate, which are important intermediates of fermentation of municipal wastewaters and sludge. The results showed that acetate-fed reactors exhibited higher performance in terms of maximum current density (I: 4.25 ± 0.23 A/m2), coulombic efficiency (CE: 95 ± 8%), and substrate degradation rate (98.8 ± 1.2%) than propionate-fed reactors (I: 2.7 ± 0.28 A/m2; CE: 68 ± 9.5%; substrate degradation rate: 84 ± 13%) irrespective of the concentrations tested. Despite of the repeated sampling of the anodic biofilm over time, the high-concentration reactors demonstrated lower and stable performance in terms of current density (I: 1.1 ± 0.14 to 4.2 ± 0.21 A/m2), coulombic efficiency (CE: 44 ± 4.1 to 103 ± 7.2%) and substrate degradation rate (64.9 ± 6.3 to 99.7 ± 0.5%), while the low-concentration reactors produced higher and dynamic performance (I: 1.1 ± 0.12 to 4.6 ± 0.1 A/m2; CE: 52 ± 2.5 to 105 ± 2.7%; substrate degradation rate: 87.2 ± 0.2 to 99.9 ± 0.06%) with the different substrates tested. Correlating reactor's performance with temporal dynamics of microbial communities showed that relatively similar anodic microbial community composition but with varying relative abundances was observed in all the reactors despite differences in the substrate and concentrations tested. Particularly, Geobacter was the predominant bacteria on the anode biofilm of all MECs over time suggesting its possible role in maintaining functional stability of MECs fed with low and high concentrations of acetate and propionate. Taken together, these results provide new insights on the microbial community dynamics and its correlation to performance in MECs fed with different concentrations of acetate and propionate, which are important volatile fatty acids in wastewater.
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Affiliation(s)
- Ananda Rao Hari
- Biological and Environmental Sciences and Engineering Division, Water Desalination and Reuse Research Center, King Abdullah University of Science and TechnologyThuwal, Saudi Arabia
| | - Krishnaveni Venkidusamy
- Centre for Environmental Risk Assessment and Remediation, University of South Australia, Mawson LakesSA, Australia
| | - Krishna P Katuri
- Biological and Environmental Sciences and Engineering Division, Water Desalination and Reuse Research Center, King Abdullah University of Science and TechnologyThuwal, Saudi Arabia
| | - Samik Bagchi
- Department of Civil, Environmental, and Architectural Engineering, University of Kansas, LawrenceKS, United States
| | - Pascal E Saikaly
- Biological and Environmental Sciences and Engineering Division, Water Desalination and Reuse Research Center, King Abdullah University of Science and TechnologyThuwal, Saudi Arabia
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10
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Zhang X, Philips J, Roume H, Guo K, Rabaey K, Prévoteau A. Rapid and Quantitative Assessment of Redox Conduction Across Electroactive Biofilms by using Double Potential Step Chronoamperometry. ChemElectroChem 2017. [DOI: 10.1002/celc.201600853] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xu Zhang
- Center for Microbial Ecology and Technology (cmet); Ghent University; Coupure Links 653 9000 Ghent Belgium
| | - Jo Philips
- Center for Microbial Ecology and Technology (cmet); Ghent University; Coupure Links 653 9000 Ghent Belgium
| | - Hugo Roume
- Center for Microbial Ecology and Technology (cmet); Ghent University; Coupure Links 653 9000 Ghent Belgium
- MetaGenoPolis; INRA; Université Paris-Saclay Domaine de Vilvert; Bâtiment 325 78350 Jouy-en-Josas France
| | - Kun Guo
- Center for Microbial Ecology and Technology (cmet); Ghent University; Coupure Links 653 9000 Ghent Belgium
| | - Korneel Rabaey
- Center for Microbial Ecology and Technology (cmet); Ghent University; Coupure Links 653 9000 Ghent Belgium
| | - Antonin Prévoteau
- Center for Microbial Ecology and Technology (cmet); Ghent University; Coupure Links 653 9000 Ghent Belgium
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11
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Paitier A, Godain A, Lyon D, Haddour N, Vogel TM, Monier JM. Microbial fuel cell anodic microbial population dynamics during MFC start-up. Biosens Bioelectron 2016; 92:357-363. [PMID: 27836597 DOI: 10.1016/j.bios.2016.10.096] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 10/19/2016] [Accepted: 10/31/2016] [Indexed: 11/28/2022]
Abstract
In order to optimize energy production in MFCs, a better understanding of anodic communities is essential. Our objective was to determine the taxonomic structure of the bacterial communities present at the surface of the anode during the formation and development of electro-active biofilms in MFCs inoculated with fresh primary clarifier overflow. Quantitative microbial community dynamics were evaluated as a function of time and electrical performance using 16S rRNA gene-based phylogenetic microarrays and flow cytometry. Results show that the bacterial community stabilized partially but not completely when voltage output was stable. Geobacter appeared to be the predominant genus, whose growth was associated with voltage, while some other genus still developed or declined after the voltage stabilization. Flow cytometry revealed that some genus showing a decreasing proportional fluorescence intensity over time were still actively respiring bacteria, and thus, active albeit minor members of the biofilm. Finally, this study shows that anodic biofilm selection and maturation is still occurring after more than 20 days of operation and over ten days after voltage is stabilized.
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Affiliation(s)
- Agathe Paitier
- Environmental Microbial Genomics, Laboratoire Ampère, École Centrale de Lyon, CNRS UMR 5005, Université de Lyon, 36 Avenue Guy de Collongue, 69134 Écully, France
| | - Alexiane Godain
- Environmental Microbial Genomics, Laboratoire Ampère, École Centrale de Lyon, CNRS UMR 5005, Université de Lyon, 36 Avenue Guy de Collongue, 69134 Écully, France
| | - Delina Lyon
- Environmental Microbial Genomics, Laboratoire Ampère, École Centrale de Lyon, CNRS UMR 5005, Université de Lyon, 36 Avenue Guy de Collongue, 69134 Écully, France
| | - Naoufel Haddour
- Environmental Microbial Genomics, Laboratoire Ampère, École Centrale de Lyon, CNRS UMR 5005, Université de Lyon, 36 Avenue Guy de Collongue, 69134 Écully, France
| | - Timothy M Vogel
- Environmental Microbial Genomics, Laboratoire Ampère, École Centrale de Lyon, CNRS UMR 5005, Université de Lyon, 36 Avenue Guy de Collongue, 69134 Écully, France.
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12
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Gao T, Ju L, Yin J, Gao H. Positive regulation of the Shewanella oneidensis OmpS38, a major porin facilitating anaerobic respiration, by Crp and Fur. Sci Rep 2015; 5:14263. [PMID: 26381456 PMCID: PMC4585640 DOI: 10.1038/srep14263] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 08/21/2015] [Indexed: 12/20/2022] Open
Abstract
Major porins are among the most abundant proteins embedded in the outer membrane (OM) of Gram-negative bacteria, playing crucial roles in maintenance of membrane structural integrity and OM permeability. Although many OM proteins (especially c-type cytochromes) in Shewanella oneidensis, a research model for respiratory versatility, have been extensively studied, physiological significance of major porins remains largely unexplored. In this study, we show that OmpS38 and OmpA are two major porins, neither of which is responsive to changes in osmolarity or contributes to the intrinsic resistance to β-lactam antibiotics. However, OmpS38 but not OmpA is largely involved in respiration of non-oxygen electron acceptors. We then provide evidence that expression of ompS38 is transcribed from two promoters, the major of which is favored under anaerobic conditions while the other appears constitutive. The major promoter is under the direct control of Crp, the master regulator dictating respiration. As a result, the increase in the level of OmpS38 correlates with an elevated activity in Crp under anaerobic conditions. In addition, we show that the activity of the major promoter is also affected by Fur, presumably indirectly, the transcription factor for iron-dependent gene expression.
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Affiliation(s)
- Tong Gao
- Institute of Microbiology and College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Lili Ju
- Institute of Microbiology and College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Jianhua Yin
- Institute of Microbiology and College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Haichun Gao
- Institute of Microbiology and College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, 310058, China
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13
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Aracic S, Manna S, Petrovski S, Wiltshire JL, Mann G, Franks AE. Innovative biological approaches for monitoring and improving water quality. Front Microbiol 2015; 6:826. [PMID: 26322034 PMCID: PMC4532924 DOI: 10.3389/fmicb.2015.00826] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Accepted: 07/27/2015] [Indexed: 12/20/2022] Open
Abstract
Water quality is largely influenced by the abundance and diversity of indigenous microbes present within an aquatic environment. Physical, chemical and biological contaminants from anthropogenic activities can accumulate in aquatic systems causing detrimental ecological consequences. Approaches exploiting microbial processes are now being utilized for the detection, and removal or reduction of contaminants. Contaminants can be identified and quantified in situ using microbial whole-cell biosensors, negating the need for water samples to be tested off-site. Similarly, the innate biodegradative processes can be enhanced through manipulation of the composition and/or function of the indigenous microbial communities present within the contaminated environments. Biological contaminants, such as detrimental/pathogenic bacteria, can be specifically targeted and reduced in number using bacteriophages. This mini-review discusses the potential application of whole-cell microbial biosensors for the detection of contaminants, the exploitation of microbial biodegradative processes for environmental restoration and the manipulation of microbial communities using phages.
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Affiliation(s)
- Sanja Aracic
- Applied and Environmental Microbiology Laboratory, Department of Physiology, Anatomy and Microbiology, La Trobe University , Melbourne, VIC, Australia
| | - Sam Manna
- Applied and Environmental Microbiology Laboratory, Department of Physiology, Anatomy and Microbiology, La Trobe University , Melbourne, VIC, Australia
| | - Steve Petrovski
- Applied and Environmental Microbiology Laboratory, Department of Physiology, Anatomy and Microbiology, La Trobe University , Melbourne, VIC, Australia
| | - Jennifer L Wiltshire
- Applied and Environmental Microbiology Laboratory, Department of Physiology, Anatomy and Microbiology, La Trobe University , Melbourne, VIC, Australia
| | - Gülay Mann
- Land Division, Defence Science and Technology Organisation , Melbourne, VIC, Australia
| | - Ashley E Franks
- Applied and Environmental Microbiology Laboratory, Department of Physiology, Anatomy and Microbiology, La Trobe University , Melbourne, VIC, Australia
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14
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Bereza-Malcolm LT, Franks AE. Coupling anaerobic bacteria and microbial fuel cells as whole-cell environmental biosensors. MICROBIOLOGY AUSTRALIA 2015. [DOI: 10.1071/ma15045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Microorganisms have evolved to respond to environmental factors allowing adaption to changing conditions and minimisation of potential harm. Microbes have the ability to sense a wide range of biotic and abiotic factors including nutrient levels, analytes, temperature, contaminants, community quorum, and metabolic activity. Due to this ability, the use of whole-cell microbes as biosensors is attractive as it can provide real-time in situ information on biologically relevant factors through qualitative and quantitative outputs. Interestingly, many of the environments where these biosensors will be of most of use lack oxygen; and as such the use of anaerobic microorganisms to sense environmental factors with easy to use outputs is essential. Furthermore, sensing of contaminants can be linked with bioremediation of known contaminated environments, allowing a flexible, multiplexed device.
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