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Santos VHJMD, Engelmann PDM, Marconatto L, Borge LGDA, Palhano PDL, Augustin AH, Rodrigues LF, Ketzer JMM, Giongo A. Exploratory analysis of the microbial community profile of the municipal solid waste leachate treatment system: A case study. WASTE MANAGEMENT (NEW YORK, N.Y.) 2022; 141:125-135. [PMID: 35114563 DOI: 10.1016/j.wasman.2022.01.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 12/11/2021] [Accepted: 01/13/2022] [Indexed: 06/14/2023]
Abstract
Studies on the degradation dynamics of landfill leachate indicate that the microbial community profile is a valuable and sensitive tool for landfill monitoring programs. Although knowledge about the microbial community can improve the efficiency of leachate treatment systems, little is known about the microbial profile changes that occur throughout the leachate attenuation process. In the present work, an exploratory analysis of the microbial community profile of the MSW leachate treatment system in the municipality of Osório (Brazil) was conducted. In this way, a comprehensive analysis of chemical parameters, isotopic signature and microbial profile data were applied to monitor the changes in the structure of the microbial community throughout the leachate attenuation process and to describe the relationship between the microbial community structure and the attenuation of chemical and isotopic parameters. From data analysis, it was possible to assess the microbial community structure and relate it to the attenuation of chemical and isotopic parameters. Based on massive parallel 16S rRNA gene sequencing, it was possible to observe that each leachate treatment unit has a specific microbial consortium, reflecting the adaptation of different microorganisms to changes in leachate characteristics throughout treatment. From our results, we concluded that the structure of the microbial community is sensitive to the leachate composition and can be applied to study the municipal solid waste management system.
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Affiliation(s)
- Victor Hugo Jacks Mendes Dos Santos
- Pontifical Catholic University of Rio Grande do Sul, PUCRS, Institute of Petroleum and Natural Resources, 6681 Ipiranga Avenue, TECNOPUC, Building 96J, 90619-900 Porto Alegre, Brazil; Pontifical Catholic University of Rio Grande do Sul, PUCRS, Materials Engineering and Technology Graduate Program, 6681 Ipiranga Avenue, Building 32, 90619-900 Porto Alegre, Brazil.
| | - Pâmela de Medeiros Engelmann
- Pontifical Catholic University of Rio Grande do Sul, PUCRS, Institute of Petroleum and Natural Resources, 6681 Ipiranga Avenue, TECNOPUC, Building 96J, 90619-900 Porto Alegre, Brazil; Pontifical Catholic University of Rio Grande do Sul, PUCRS, Materials Engineering and Technology Graduate Program, 6681 Ipiranga Avenue, Building 32, 90619-900 Porto Alegre, Brazil.
| | - Letícia Marconatto
- Pontifical Catholic University of Rio Grande do Sul, PUCRS, Institute of Petroleum and Natural Resources, 6681 Ipiranga Avenue, TECNOPUC, Building 96J, 90619-900 Porto Alegre, Brazil
| | - Luiz Gustavo Dos Anjos Borge
- Pontifical Catholic University of Rio Grande do Sul, PUCRS, Institute of Petroleum and Natural Resources, 6681 Ipiranga Avenue, TECNOPUC, Building 96J, 90619-900 Porto Alegre, Brazil
| | - Pâmela de Lara Palhano
- Pontifical Catholic University of Rio Grande do Sul, PUCRS, Institute of Petroleum and Natural Resources, 6681 Ipiranga Avenue, TECNOPUC, Building 96J, 90619-900 Porto Alegre, Brazil
| | - Adolpho Herbert Augustin
- Pontifical Catholic University of Rio Grande do Sul, PUCRS, Institute of Petroleum and Natural Resources, 6681 Ipiranga Avenue, TECNOPUC, Building 96J, 90619-900 Porto Alegre, Brazil
| | - Luiz Frederico Rodrigues
- Pontifical Catholic University of Rio Grande do Sul, PUCRS, Institute of Petroleum and Natural Resources, 6681 Ipiranga Avenue, TECNOPUC, Building 96J, 90619-900 Porto Alegre, Brazil
| | - João Marcelo Medina Ketzer
- Pontifical Catholic University of Rio Grande do Sul, PUCRS, Institute of Petroleum and Natural Resources, 6681 Ipiranga Avenue, TECNOPUC, Building 96J, 90619-900 Porto Alegre, Brazil; Linnaeus University, Department of Biology and Environmental Sciences, 391 82 Kalmar, Sweden
| | - Adriana Giongo
- Pontifical Catholic University of Rio Grande do Sul, PUCRS, Institute of Petroleum and Natural Resources, 6681 Ipiranga Avenue, TECNOPUC, Building 96J, 90619-900 Porto Alegre, Brazil; Regional University of Blumenau, Environmental Engineering Graduate Program, Blumenau, Brazil.
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Holmes DE, Orelana R, Giloteaux L, Wang LY, Shrestha P, Williams K, Lovley DR, Rotaru AE. Potential for Methanosarcina to Contribute to Uranium Reduction during Acetate-Promoted Groundwater Bioremediation. MICROBIAL ECOLOGY 2018; 76:660-667. [PMID: 29500492 PMCID: PMC6132540 DOI: 10.1007/s00248-018-1165-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 02/16/2018] [Indexed: 05/06/2023]
Abstract
Previous studies of acetate-promoted bioremediation of uranium-contaminated aquifers focused on Geobacter because no other microorganisms that can couple the oxidation of acetate with U(VI) reduction had been detected in situ. Monitoring the levels of methyl CoM reductase subunit A (mcrA) transcripts during an acetate-injection field experiment demonstrated that acetoclastic methanogens from the genus Methanosarcina were enriched after 40 days of acetate amendment. The increased abundance of Methanosarcina corresponded with an accumulation of methane in the groundwater. In order to determine whether Methanosarcina species could be participating in U(VI) reduction in the subsurface, cell suspensions of Methanosarcina barkeri were incubated in the presence of U(VI) with acetate provided as the electron donor. U(VI) was reduced by metabolically active M. barkeri cells; however, no U(VI) reduction was observed in inactive controls. These results demonstrate that Methanosarcina species could play an important role in the long-term bioremediation of uranium-contaminated aquifers after depletion of Fe(III) oxides limits the growth of Geobacter species. The results also suggest that Methanosarcina have the potential to influence uranium geochemistry in a diversity of anaerobic sedimentary environments.
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Affiliation(s)
- Dawn E Holmes
- Department of Physical and Biological Science, Western New England University, Springfield, MA, USA.
- Department of Microbiology, University of Massachusetts Amherst, Amherst, MA, USA.
| | - Roberto Orelana
- Department of Microbiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - Ludovic Giloteaux
- Department of Molecular Biology and Genetics, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY, USA
| | - Li-Ying Wang
- Department of Microbiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - Pravin Shrestha
- Energy Biosciences Institute, University of California Berkeley, Berkeley, CA, USA
| | | | - Derek R Lovley
- Department of Microbiology, University of Massachusetts Amherst, Amherst, MA, USA
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Cápiro NL, Wang Y, Hatt JK, Lebrón CA, Pennell KD, Löffler FE. Distribution of organohalide-respiring bacteria between solid and aqueous phases. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:10878-87. [PMID: 25105899 DOI: 10.1021/es501320h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Contemporary microbial monitoring of aquifers relies on groundwater samples to enumerate nonattached cells of interest. One-dimensional column studies quantified the distribution of bacterial cells in solid and the aqueous phases as a function of microbial species, growth substrate availability and porous medium (i.e., Appling soil versus Federal Fine Ottawa sand with 0.75% and 0.01% [w/w] organic carbon, respectively). Without supplied growth substrates, effluent from columns inoculated with the tetrachloroethene- (PCE-) to-ethene-dechlorinating bacterial consortium BDI-SZ containing Dehalococcoides mccartyi (Dhc) strains and Geobacter lovleyi strain SZ (GeoSZ), or inoculated with Anaeromyxobacter dehalogenans strain W (AdehalW), captured 94-96, 81-99, and 73-84% of the Dhc, GeoSZ, and AdehalW cells, respectively. Cell retention was organism-specific and increased in the order Dhc < GeoSZ < AdehalW. When amended with 10 mM lactate and 0.11 mM PCE, aqueous samples accounted for 1.3-27 and 0.02-22% of the total Dhc and GeoSZ biomass, respectively. In Appling soil, up to three orders-of-magnitude more cells were associated with the solid phase, and attachment rate coefficients (katt) were consistently greater compared to Federal Fine sand. Cell-solid interaction energies ranged from -2.5 to 787 kT and were consistent with organism-specific deposition behavior, where GeoSZ and AdehalW exhibited greater attachment than Dhc cells. The observed disparities in microbial cell distributions between the aqueous and solid phases imply that groundwater analysis can underestimate the total cell abundance in the aquifer by orders-of-magnitude under conditions of growth and in porous media with elevated organic carbon content. The implications of these findings for monitoring chlorinated solvent sites are discussed.
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Affiliation(s)
- Natalie L Cápiro
- Department of Civil and Environmental Engineering, Tufts University , Medford, Massachusetts 02155, United States
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