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Watahiki S, Kimura N, Yamazoe A, Miura T, Sekiguchi Y, Noda N, Matsukura S, Kasai D, Takahata Y, Nojiri H, Fukuda M. Ecological impact assessment of a bioaugmentation site on remediation of chlorinated ethylenes by multi-omics analysis. J GEN APPL MICROBIOL 2019; 65:225-233. [PMID: 30853704 DOI: 10.2323/jgam.2018.10.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Bioremediation may affect the ecological system around bioremediation sites. However, little is known about how microbial community structures change over time after the initial injection of degraders. In this study, we have assessed the ecological impact of bioaugmentation using metagenomic and metatranscriptomic approaches to remove trichlorinated ethylene/cis-dichloroethylene (TCE/cDCE) by Rhodococcus jostii strain RHA1 as an aerobic chemical compound degrader. Metagenomic analysis showed that the number of organisms belonging to the genus Rhodococcus, including strain RHA1, increased from 0.1% to 76.6% of the total microbial community on day 0 at the injection site. Subsequently, the populations of strain RHA1 and other TCE/cDCE-degrading bacteria gradually decreased over time, whereas the populations of the anaerobic dechlorinators Geobacter and Dehalococcoides increased at later stages. Metatranscriptomic analysis revealed a high expression of aromatic compound-degrading genes (bphA1-A4) in strain RHA1 after RHA1 injection. From these results, we concluded that the key dechlorinators of TCE/cDCE were mainly aerobic bacteria, such as RHA1, until day 1, after which the key dechlorinators changed to anaerobic bacteria, such as Geobacter and Dehalococcocides, after day 6 at the injection well. Based on the α-diversity, the richness levels of the microbial community were increased after injection of strain RHA1, and the microbial community composition had not been restored to that of the original composition during the 19 days after treatment. These results provide insights into the assessment of the ecological impact and bioaugmentation process of RHA1 at bioremediation sites.
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Affiliation(s)
- Saori Watahiki
- Life Sciences and Bioengineering, Graduate School of Life and Environmental Science, University of Tsukuba.,Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
| | - Nobutada Kimura
- Life Sciences and Bioengineering, Graduate School of Life and Environmental Science, University of Tsukuba.,Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
| | | | | | - Yuji Sekiguchi
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
| | - Naohiro Noda
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
| | - Satoko Matsukura
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
| | - Daisuke Kasai
- Department of Bioengineering, Nagaoka University of Technology
| | | | | | - Masao Fukuda
- Department of Bioengineering, Nagaoka University of Technology
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Santini TC, Peng YG. Microbial Fermentation of Organic Carbon Substrates Drives Rapid pH Neutralization and Element Removal in Bauxite Residue Leachate. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:12592-12601. [PMID: 29027790 DOI: 10.1021/acs.est.7b02844] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Globally, mineral processing activities produce an estimated 680 GL/yr of alkaline wastewater. Neutralizing pH and removing dissolved elements are the main goals of wastewater treatment prior to discharge. Here, we present the first study to explicitly evaluate the role of microbial communities in driving pH neutralization and element removal in alkaline wastewaters by fermentation of organic carbon, using bauxite residue leachate as a model system, and evaluate the effects of organic carbon complexity and microbial inoculum addition rates on the performance of these treatment systems at laboratory scale. Rates and extents of pH neutralization were higher in bioreactors fed with simpler organic carbon substrates (glucose and banana: 6 days to reach pH ≤ 8) than those fed with more complex organic carbon substrates (eucalyptus mulch: 15 days to reach pH ≤ 8; woodchips: equilibrium pH around 9). Concentrations of dissolved Al, As, B, Mo, Na, S, and V all significantly decreased after bioremediation. Increasing soil inoculant addition rate accelerated rates and extent of pH neutralization and element removal up to 0.1 wt %; further increases had little effect. Overall, glucose added at 1.8 wt % and soil inoculum added at 0.1 wt % provided the most effective minimal combination of carbon substrate and inoculum to drive pH neutralization and element removal.
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Affiliation(s)
- Talitha C Santini
- School of Earth and Environmental Sciences, The University of Queensland , Brisbane, Queensland 4072, Australia
- School of Agriculture and Environment, The University of Western Australia , Crawley, Western Australia 6009, Australia
- School of Chemistry and Molecular Biosciences, The University of Queensland , Brisbane, Queensland 4072, Australia
| | - Yong G Peng
- School of Chemistry and Molecular Biosciences, The University of Queensland , Brisbane, Queensland 4072, Australia
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Zhao Y, Qu D, Zhou R, Yang S, Ren H. Efficacy of forming biofilms by Pseudomonas migulae AN-1 toward in situ bioremediation of aniline-contaminated aquifer by groundwater circulation wells. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:11568-11573. [PMID: 27115704 DOI: 10.1007/s11356-016-6737-7] [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: 01/08/2016] [Accepted: 04/20/2016] [Indexed: 06/05/2023]
Abstract
The formation and activity of aniline-degrading biofilms developed by the psychrotrophic Pseudomonas migulae AN-1 were studied for the in situ remediation of contaminated aquifer using in-well bioreactor of groundwater circulating wells (GCWs). Biofilms grown in mineral salt medium with aniline exhibited tolerance to high concentrations of aniline. In aniline degradation rate, AN-1 biofilms exhibited slight differences compared with planktonic cells. The effectiveness and bio-implication of AN-1 biofilms in GCWs were investigated to treat aniline-contaminated aquifer. The results demonstrate that AN-1 biofilms survived the GCWs treatment process with high aniline-degrading efficiency. This system provides a novel environmentally friendly technology for the in situ bioremediation of low-volatile contaminants.
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Affiliation(s)
- Yongsheng Zhao
- Key Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of Environment and Resources, Jilin University, 2519 Jiefang Road, Changchun, 130021, People's Republic of China
| | - Dan Qu
- Key Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of Environment and Resources, Jilin University, 2519 Jiefang Road, Changchun, 130021, People's Republic of China
| | - Rui Zhou
- Key Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of Environment and Resources, Jilin University, 2519 Jiefang Road, Changchun, 130021, People's Republic of China
| | - Shuai Yang
- Key Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of Environment and Resources, Jilin University, 2519 Jiefang Road, Changchun, 130021, People's Republic of China
| | - Hejun Ren
- Key Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of Environment and Resources, Jilin University, 2519 Jiefang Road, Changchun, 130021, People's Republic of China.
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Weathers TS, Harding-Marjanovic K, Higgins CP, Alvarez-Cohen L, Sharp JO. Perfluoroalkyl Acids Inhibit Reductive Dechlorination of Trichloroethene by Repressing Dehalococcoides. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:240-248. [PMID: 26636352 DOI: 10.1021/acs.est.5b04854] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The subsurface recalcitrance of perfluoroalkyl acids (PFAAs) derived from aqueous film-forming foams could have adverse impacts on the microbiological processes used for the bioremediation of co-mingled chlorinated solvents such as trichloroethene (TCE). Here, we show that reductive dechlorination by a methanogenic, mixed culture was significantly inhibited when exposed to concentrations representative of PFAA source zones (>66 mg/L total of 11 PFAA analytes, 6 mg/L each). TCE dechlorination, cis-dichloroethene and vinyl chloride production and dechlorination, and ethene generation were all inhibited at these PFAA concentrations. Phylogenetic analysis revealed that the abundances of 65% of the operational taxonomic units (OTUs) changed significantly when grown in the presence of PFAAs, although repression or enhancement resulting from PFAA exposure did not correlate with putative function or phylogeny. Notably, there was significant repression of Dehalococcoides (8-fold decrease in abundance) coupled with a corresponding enhancement of methane-generating Archaea (a 9-fold increase). Growth and dechlorination by axenic cultures of Dehalococcoides mccartyi strain 195 were similarly repressed under these conditions, confirming an inhibitory response of this pivotal genus to PFAA presence. These results suggest that chlorinated solvent bioattenuation rates could be impeded in subsurface environments near PFAA source zones.
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Affiliation(s)
- Tess S Weathers
- Hydrologic Science and Engineering Program and Department of Civil and Environmental Engineering, Colorado School of Mines , Golden, Colorado 80401, United States
| | - Katie Harding-Marjanovic
- Civil and Environmental Engineering, University of California , Berkeley, California 94720, United States
| | - Christopher P Higgins
- Hydrologic Science and Engineering Program and Department of Civil and Environmental Engineering, Colorado School of Mines , Golden, Colorado 80401, United States
| | - Lisa Alvarez-Cohen
- Civil and Environmental Engineering, University of California , Berkeley, California 94720, United States
| | - Jonathan O Sharp
- Hydrologic Science and Engineering Program and Department of Civil and Environmental Engineering, Colorado School of Mines , Golden, Colorado 80401, United States
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Zhu X, Liu R, Liu C, Chen L. Bioaugmentation with isolated strains for the removal of toxic and refractory organics from coking wastewater in a membrane bioreactor. Biodegradation 2015; 26:465-74. [PMID: 26510738 DOI: 10.1007/s10532-015-9748-z] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Accepted: 10/24/2015] [Indexed: 11/24/2022]
Abstract
The bioaugmentation strains for phenol, pyridine, quinoline, carbazole, and naphthalene degradation were employed to treat coking wastewater in a membrane bioreactor (MBR). The results showed that the bioaugmented MBR was much better in pollutant removal than that of the control MBR with conventional activated sludge. Compared to the control MBR, the bioaugmented MBR displayed an additional 3.2 mg/L of phenol, pyridine, quinoline, naphthalene and carbazole in total by the addition of the degrading strains. Also, about 10 % of the chemical oxygen demand in the effluent was further removed by the bioaugmentation. The pyrosequencing analysis of the sludge in the MBRs revealed that the microbial community shifted in response to the addition of the degrading strains. The diversity of the microbial community increased during the bioaugmentation, and some bacterial taxa favorable to the removal of toxic and refractory pollutants appeared in the bioaugmented MBR. The results indicated that the use of high-efficiency bacteria was a feasible method for industrial coking wastewater treatment.
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Affiliation(s)
- Xiaobiao Zhu
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China
| | - Rui Liu
- Key Laboratory of Water Science and Technology of Zhejiang Province, Jiaxing, 314006, People's Republic of China
| | - Cong Liu
- School of Environment, Tsinghua University, Beijing, 100084, People's Republic of China
| | - Lujun Chen
- School of Environment, Tsinghua University, Beijing, 100084, People's Republic of China.
- Key Laboratory of Water Science and Technology of Zhejiang Province, Jiaxing, 314006, People's Republic of China.
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Matteucci F, Ercole C, Del Gallo M. A study of chlorinated solvent contamination of the aquifers of an industrial area in central Italy: a possibility of bioremediation. Front Microbiol 2015; 6:924. [PMID: 26388862 PMCID: PMC4556989 DOI: 10.3389/fmicb.2015.00924] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Accepted: 08/21/2015] [Indexed: 11/13/2022] Open
Abstract
Perchloroethene, trichloroethene, and other chlorinated solvents are widespread groundwater pollutants. They form dense non-aqueous phase liquids that sink through permeable groundwater aquifers until non-permeable zone is reached. In Italy, there are many situations of serious contamination of groundwater that might compromise their use in industry, agriculture, private, as the critical case of a Central Italy valley located in the province of Teramo (“Val Vibrata”), characterized by a significant chlorinated solvents contamination. Data from the various monitoring campaigns that have taken place over time were collected, and new samplings were carried out, resulting in a complete database. The data matrix was processed with a multivariate statistic analysis (in particular principal component analysis, PCA) and was then imported into geographic information system (GIS), to obtain a model of the contamination. A microcosm anaerobic study was utilized to assess the potential for in situ natural or enhanced bioremediation. Most of the microcosms were positive for dechlorination, particularly those inoculated with a mineral medium. This indicate the presence of an active native dechlorinating population in the subsurface, probably inhibited by co-contaminants in the groundwater, or more likely by the absence or lack of nutritional factors. Among the tested electron donors (i.e., yeast extract, lactate, and butyrate) lactate and butyrate enhanced dechlorination of chlorinated compounds. PCA and GIS studies allowed delimiting the contamination; the microcosm study helped to identify the conditions to promote the bioremediation of the area.
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Affiliation(s)
- Federica Matteucci
- Laboratory of Environmental Microbiology, Department of Life, Health and Environmental Sciences, University of L'Aquila L'Aquila, Italy
| | - Claudia Ercole
- Laboratory of Environmental Microbiology, Department of Life, Health and Environmental Sciences, University of L'Aquila L'Aquila, Italy
| | - Maddalena Del Gallo
- Laboratory of Environmental Microbiology, Department of Life, Health and Environmental Sciences, University of L'Aquila L'Aquila, Italy
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Palau J, Shouakar-Stash O, Hunkeler D. Carbon and chlorine isotope analysis to identify abiotic degradation pathways of 1,1,1-trichloroethane. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:14400-14408. [PMID: 25379605 DOI: 10.1021/es504252z] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This study investigates dual C-Cl isotope fractionation during 1,1,1-TCA transformation by heat-activated persulfate (PS), hydrolysis/dehydrohalogenation (HY/DH) and Fe(0). Compound-specific chlorine isotope analysis of 1,1,1-TCA was performed for the first time, and transformation-associated isotope fractionation ε bulk C and ε bulk Cl values were -4.0 ± 0.2‰ and no chlorine isotope fractionation with PS, -1.6 ± 0.2‰ and -4.7 ± 0.1‰ for HY/DH, -7.8 ± 0.4‰ and -5.2 ± 0.2‰ with Fe(0). Distinctly different dual isotope slopes (Δδ13C/Δδ37Cl): ∞ with PS, 0.33 ± 0.04 for HY/DH and 1.5 ± 0.1 with Fe(0) highlight the potential of this approach to identify abiotic degradation pathways of 1,1,1-TCA in the field. The trend observed with PS agreed with a C-H bond oxidation mechanism in the first reaction step. For HY/DH and Fe(0) pathways, different slopes were obtained although both pathways involve cleavage of a C-Cl bond in their initial reaction step. In contrast to the expected larger primary carbon isotope effects relative to chlorine for C-Cl bond cleavage, ε bulk C < ε bulk Cl was observed for HY/DH and in a similar range for reduction by Fe(0), suggesting the contribution of secondary chlorine isotope effects. Therefore, different magnitude of secondary chlorine isotope effects could at least be partly responsible for the distinct slopes between HY/DH and Fe(0) pathways. Following this dual isotope approach, abiotic transformation processes can unambiguously be identified and quantified.
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Affiliation(s)
- Jordi Palau
- Centre for Hydrogeology and Geothermics, University of Neuchâtel , Neuchâtel CH-2000, Switzerland
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