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Platt GA, Davis KJ, Schweitzer HD, Smith HJ, Fields MW, Barnhart EP, Gerlach R. Algal amendment enhances biogenic methane production from coals of different thermal maturity. Front Microbiol 2023; 14:1097500. [PMID: 36970672 PMCID: PMC10036379 DOI: 10.3389/fmicb.2023.1097500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 02/06/2023] [Indexed: 03/12/2023] Open
Abstract
The addition of small amounts of algal biomass to stimulate methane production in coal seams is a promising low carbon renewable coalbed methane enhancement technique. However, little is known about how the addition of algal biomass amendment affects methane production from coals of different thermal maturity. Here, we show that biogenic methane can be produced from five coals ranging in rank from lignite to low-volatile bituminous using a coal-derived microbial consortium in batch microcosms with and without algal amendment. The addition of 0.1 g/l algal biomass resulted in maximum methane production rates up to 37 days earlier and decreased the time required to reach maximum methane production by 17–19 days when compared to unamended, analogous microcosms. Cumulative methane production and methane production rate were generally highest in low rank, subbituminous coals, but no clear association between increasing vitrinite reflectance and decreasing methane production could be determined. Microbial community analysis revealed that archaeal populations were correlated with methane production rate (p = 0.01), vitrinite reflectance (p = 0.03), percent volatile matter (p = 0.03), and fixed carbon (p = 0.02), all of which are related to coal rank and composition. Sequences indicative of the acetoclastic methanogenic genus Methanosaeta dominated low rank coal microcosms. Amended treatments that had increased methane production relative to unamended analogs had high relative abundances of the hydrogenotrophic methanogenic genus Methanobacterium and the bacterial family Pseudomonadaceae. These results suggest that algal amendment may shift coal-derived microbial communities towards coal-degrading bacteria and CO2-reducing methanogens. These results have broad implications for understanding subsurface carbon cycling in coal beds and the adoption of low carbon renewable microbially enhanced coalbed methane techniques across a diverse range of coal geology.
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Affiliation(s)
- George A. Platt
- Center for Biofilm Engineering, Montana State University-Bozeman, Bozeman, MT, United States
- Department of Chemical and Biological Engineering, Montana State University-Bozeman, Bozeman, MT, United States
| | - Katherine J. Davis
- Center for Biofilm Engineering, Montana State University-Bozeman, Bozeman, MT, United States
- Department of Chemical and Biological Engineering, Montana State University-Bozeman, Bozeman, MT, United States
| | - Hannah D. Schweitzer
- Center for Biofilm Engineering, Montana State University-Bozeman, Bozeman, MT, United States
- Department of Microbiology and Immunology, Montana State University-Bozeman, Bozeman, MT, United States
- Department of Arctic and Marine Biology, Faculty of Biosciences, Fisheries and Economics, UiT The Arctic University of Norway, Tromsø, Norway
| | - Heidi J. Smith
- Center for Biofilm Engineering, Montana State University-Bozeman, Bozeman, MT, United States
| | - Matthew W. Fields
- Center for Biofilm Engineering, Montana State University-Bozeman, Bozeman, MT, United States
- Department of Microbiology and Immunology, Montana State University-Bozeman, Bozeman, MT, United States
| | - Elliott P. Barnhart
- United States Geological Survey, Montana Water Science Center, Helena, MT, United States
| | - Robin Gerlach
- Center for Biofilm Engineering, Montana State University-Bozeman, Bozeman, MT, United States
- Department of Chemical and Biological Engineering, Montana State University-Bozeman, Bozeman, MT, United States
- *Correspondence: Robin Gerlach,
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Cason ED, Vermeulen JG, Müller WJ, van Heerden E, Valverde A. Aerobic and anaerobic enrichment cultures highlight the pivotal role of facultative anaerobes in soil hydrocarbon degradation. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2019; 54:408-415. [PMID: 30676291 DOI: 10.1080/10934529.2018.1558902] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 11/21/2018] [Accepted: 12/01/2018] [Indexed: 06/09/2023]
Abstract
Aliphatic and aromatic hydrocarbons are ubiquitous in the environment due to natural and anthropogenic processes. Under aerobic conditions hydrocarbons can be rapidly biodegraded but oxygenated environments often quickly become anaerobic when microbial respiration is coupled to contaminant oxidation. Most studies in literature usually focus on the initial microbial diversity of the hydrocarbon impacted environment and examine either aerobic or anaerobic conditions for enrichment. Hence, the aim of the present study was to enrich bacterial consortiums from two diesel impacted soil samples under both these conditions to assess the enrichment diversities and hydrocarbon degradation potentials. This would shed light upon how an environmental population shift would correlate to oxygen intrusion and depletion and still continue hydrocarbon degradation. Analysis of the 16S rRNA gene sequences showcases the different microbial populations that could emerge as the environmental factors change, resulting in different populations that are still capable of hydrocarbon degradation. Microbial diversity analysis also highlights the role of facultative anaerobic bacteria like Pseudomonas spp. and Citrobacter spp. in maintaining hydrocarbon degradation. This study shows that microorganisms capable of surviving under both oxic and anoxic (aerobic and anaerobic) conditions are the most crucial to the long term degradation of hydrocarbons in the environment.
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Affiliation(s)
- Errol D Cason
- a Department of Microbial, Biochemical and Food Biotechnology, Faculty of Natural and Agricultural Sciences , University of the Free State , Bloemfontein , South Africa
| | - Jan-G Vermeulen
- a Department of Microbial, Biochemical and Food Biotechnology, Faculty of Natural and Agricultural Sciences , University of the Free State , Bloemfontein , South Africa
| | - Walter J Müller
- a Department of Microbial, Biochemical and Food Biotechnology, Faculty of Natural and Agricultural Sciences , University of the Free State , Bloemfontein , South Africa
| | | | - Angel Valverde
- a Department of Microbial, Biochemical and Food Biotechnology, Faculty of Natural and Agricultural Sciences , University of the Free State , Bloemfontein , South Africa
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Mujahid M, Prasuna ML, Sasikala C, Ramana CV. Integrated Metabolomic and Proteomic Analysis Reveals Systemic Responses of Rubrivivax benzoatilyticus JA2 to Aniline Stress. J Proteome Res 2014; 14:711-27. [DOI: 10.1021/pr500725b] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Md Mujahid
- Department
of Plant Sciences, School of Life Sciences, University of Hyderabad, P.O. Central University, Hyderabad 500 046, India
| | - M Lakshmi Prasuna
- Department
of Plant Sciences, School of Life Sciences, University of Hyderabad, P.O. Central University, Hyderabad 500 046, India
| | - Ch Sasikala
- Bacterial
Discovery Laboratory, Center for Environment, IST, JNT University Hyderabad, Kukatpally, Hyderabad 500 085, India
| | - Ch Venkata Ramana
- Department
of Plant Sciences, School of Life Sciences, University of Hyderabad, P.O. Central University, Hyderabad 500 046, India
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Mohammed M, Ch S, Ch RV. Aniline is an inducer, and not a precursor, for indole derivatives in Rubrivivax benzoatilyticus JA2. PLoS One 2014; 9:e87503. [PMID: 24533057 PMCID: PMC3922755 DOI: 10.1371/journal.pone.0087503] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Accepted: 12/27/2013] [Indexed: 11/19/2022] Open
Abstract
Rubrivivax benzoatilyticus JA2 and other anoxygenic photosynthetic bacteria produce indole derivatives when exposed to aniline, a xenobiotic compound. Though this phenomenon has been reported previously, the role of aniline in the production of indoles is still a biochemical riddle. The present study aims at understanding the specific role of aniline (as precursor or stimulator) in the production of indoles and elucidating the biochemical pathway of indoles in aniline-exposed cells by using stable isotope approaches. Metabolic profiling revealed tryptophan accumulation only in aniline exposed cells along with indole 3-acetic acid (IAA) and indole 3-aldehyde (IAld), the two major catabolites of tryptophan. Deuterium labelled aniline feeding studies revealed that aniline is not a precursor of indoles in strain JA2. Further, production of indoles only in aniline-exposed cells suggests that aniline is an indoles stimulator. In addition, production of indoles depended on the presence of a carbon source, and production enhanced when carbon sources were added to the culture. Isotope labelled fumarate feeding identified, fumarate as the precursor of indole, indicating de novo synthesis of indoles. Glyphosate (shikimate pathway inhibitor) inhibited the indoles production, accumulation of tryptophan, IAA and IAld indicating that indoles synthesis in strain JA2 occurs via the de novo shikimate pathway. The up-regulation of anthranilate synthase gene and induction of anthranilate synthase activity correlated well with tryptophan production in strain JA2. Induction of tryptophan aminotransferase and tryptophan 2-monooxygenase activities corroborated well with IAA levels, suggesting that tryptophan catabolism occurs simultaneously in aniline exposed cells. Our study demonstrates that aniline (stress) stimulates tryptophan/indoles synthesis via the shikimate pathway by possibly modulating the metabolic pathway.
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Affiliation(s)
- Mujahid Mohammed
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, India
| | - Sasikala Ch
- Bacterial Discovery Laboratory, Centre for Environment, IST, J NT University Hyderabad, Kukatpally, Hyderabad, India
| | - Ramana V. Ch
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, India
- * E-mail:
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Sun M, Ye M, Hu F, Li H, Teng Y, Luo Y, Jiang X, Kengara FO. Tenax extraction for exploring rate-limiting factors in methyl-β-cyclodextrin enhanced anaerobic biodegradation of PAHs under denitrifying conditions in a red paddy soil. JOURNAL OF HAZARDOUS MATERIALS 2014; 264:505-513. [PMID: 24239261 DOI: 10.1016/j.jhazmat.2013.10.032] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Revised: 09/27/2013] [Accepted: 10/16/2013] [Indexed: 06/02/2023]
Abstract
The effectiveness of anaerobic bioremediation systems for PAH-contaminated soil may be constrained by low contaminants bioaccessibility due to limited aqueous solubility and lack of suitable electron acceptors. Information on what is the rate-limiting factor in bioremediation process is of vital importance in the decision in what measures can be taken to assist the biodegradation efficacy. In the present study, four different microcosms were set to study the effect of methyl-β-cyclodextrin (MCD) and nitrate addition (N) on PAHs biodegradation under anaerobic conditions in a red paddy soil. Meanwhile, sequential Tenax extraction combined with a first-three-compartment model was employed to evaluate the rate-limiting factors in MCD enhanced anaerobic biodegradation of PAHs. Microcosms with both 1% (w/w) MCD and 20mM N addition produced maximum biodegradation of total PAHs of up to 61.7%. It appears rate-limiting factors vary with microcosms: low activity of degrading microorganisms is the vital rate-limiting factor for control and MCD addition treatments (CK and M treatments); and lack of bioaccessible PAHs is the main rate-limiting factor for nitrate addition treatments (N and MN treatments). These results have practical implications for site risk assessment and cleanup strategies.
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Affiliation(s)
- Mingming Sun
- Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, PR China; Key Laboratory of Soil Environmental and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China.
| | - Mao Ye
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Feng Hu
- Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, PR China.
| | - Huixin Li
- Soil Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Ying Teng
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Yongming Luo
- Yantai Institute of Costal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China
| | - Xin Jiang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China
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Acetogens and acetoclastic methanosarcinales govern methane formation in abandoned coal mines. Appl Environ Microbiol 2011; 77:3749-56. [PMID: 21460109 DOI: 10.1128/aem.02818-10] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In abandoned coal mines, methanogenic archaea are responsible for the production of substantial amounts of methane. The present study aimed to directly unravel the active methanogens mediating methane release as well as active bacteria potentially involved in the trophic network. Therefore, the stable-isotope-labeled precursors of methane, [(13)C]acetate and H(2)-(13)CO(2), were fed to liquid cultures from hard coal and mine timber from a coal mine in Germany. Guided by methane production rates, samples for DNA stable-isotope probing (SIP) with subsequent quantitative PCR and denaturing gradient gel electrophoretic (DGGE) analyses were taken over 6 months. Surprisingly, the formation of [(13)C]methane was linked to acetoclastic methanogenesis in both the [(13)C]acetate- and the H(2)-(13)CO(2)-amended cultures of coal and timber. H(2)-(13)CO(2) was used mainly by acetogens related to Pelobacter acetylenicus and Clostridium species. Active methanogens, closely affiliated with Methanosarcina barkeri, utilized the readily available acetate rather than the thermodynamically more favorable hydrogen. Thus, the methanogenic microbial community appears to be highly adapted to the low-H(2) conditions found in coal mines.
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Maillacheruvu KY, Pathan IA. Biodegradation of naphthalene, phenanthrene, and pyrene under anaerobic conditions. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2009; 44:1315-1326. [PMID: 20183488 DOI: 10.1080/10934520903212956] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The biodegradation of naphthalene, phenanthrene, and pyrene were studied in batch reactors using an anaerobic acetate-fed enrichment culture developed from the Greater Peoria Sanitary District Wastewater Treatment Facility. Baseline kinetic experiments showed that maximum specific substrate utilization for the acetate-fed enrichment culture was 2.72 mg acetate/mg cell/day and the endogenous decay coefficient was 0.043 day(-1). Maximum specific substrate utilization rates in mg substrate/mg cell/day for naphthalene, phenanthrene and pyrene were 0.57, 0.009 and 0.007, respectively. The half saturation constant K(S) in mg/L were 0.075, 0.01 and less than 0.01, respectively. The endogenous decay coefficient (in units of day(-1)) in the presence of naphthalene, phenanthrene and pyrene were 0.06, 0.07 and 0.04, respectively. Results from this study indicated that naphthalene and phenanthrene were more easily biodegradable than pyrene. These results suggest that technologies using anaerobic biodegradation using a relatively simple enrichment culture from a wastewater treatment plant may be successful in treating PAH contaminated wastes.
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