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Tuesday, October 20, 2020 | History

2 edition of Microbial degradation of alkylbenzenes under sulfate-reducing and methanogenic conditions found in the catalog.

Microbial degradation of alkylbenzenes under sulfate-reducing and methanogenic conditions

Microbial degradation of alkylbenzenes under sulfate-reducing and methanogenic conditions

project summary

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Published by U.S. Environmental Protection Agency, Robert S. Kerr Environmental Research Laboratory in Ada, OK .
Written in English

    Subjects:
  • Organic compounds -- Biodegradation

  • Edition Notes

    StatementHarry R. Beller ... [et al.]
    ContributionsBeller, Harry S, Robert S. Kerr Environmental Research Laboratory
    The Physical Object
    FormatMicroform
    Pagination1 v
    ID Numbers
    Open LibraryOL14717908M

      Korris Lee, Ania Ulrich, Indigenous microbial communities in Albertan sediments are capable of anaerobic benzene biodegradation under methanogenic, sulfate‐reducing, nitrate‐reducing, and iron‐reducing redox conditions, Water Environment Research, /wer, 0, 0, ().   In situ anaerobic biotransformation of BTEX (benzene, toluene, ethylbenzene, o-xylene, and m-xylene) was investigated under enhanced nitrate- and sulfate-reducing conditions. Controlled amounts of BTEX compounds added to slugs of treated groundwater were released into a gasoline-contaminated aquifer at Seal Beach, CA. In a series of studies, the slugs, − L in volume, .

    Butyrate Conversion by Sulfate-Reducing and Methanogenic Communities from Anoxic Sediments of Aarhus Bay, Denmark. Denmark under Sulfidogenic and Methanogenic Conditions. Microorganisms , 8(3 The phylogenetic diversity of Bacteria and Archaea was studied by modern molecular approaches of 16S rRNA gene amplicon pyrosequencing and by. The ability of anaerobic microorganisms to degrade a wide variety of crude oil components was investigated using chronically hydrocarbon-contaminated marine sediments as the source of inoculum. When sulfate reduction was the predominant electron-accepting process, gas chromatographic analysis revealed almost complete n-alkane removal (C15−C34) from a weathered oil within d of incubation.

    The metabolic potential of sulfate-reducing bacteria for degradation of alkylbenzenes is probably much wider than presently known; even benzene and naphthalene appear to be degraded in anaerobic sediments under sulfate-reducing conditions [35, 36]. In this study, carbon isotope fractionation during MTBE degradation under sulfate-reducing and methanogenic conditions was studied in anaerobic cultures enriched from two different sediments. Significant enrichment of 13 C in residual MTBE during anaerobic biotransformation was observed under both sulfate-reducing and methanogenic conditions.


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Microbial degradation of alkylbenzenes under sulfate-reducing and methanogenic conditions Download PDF EPUB FB2

EPA/// July MICROBIAL DEGRADATION OF ALKYLBENZENES UNDER SULFATE-REDUCING AND METHANOGENIC CONDITIONS by Harry R. Beller, Elizabeth A. Edwards, Dunja Grbic-Galic, Martin Reinhard Department of Civil Engineering Stanford University Stanford, California CR Project Officer Stephen R. Hutchins Processes and Systems Research.

United States Environmental Protection Agency Robert S. Kerr Environmental Research Laboratory Ada, OK Research and Development EPA//S/ Aug. vxEPA Project Summary Microbial Degradation of Alkylbenzenes under Sulfate- Reducing and Methanogenic Conditions Harry R.

Belter, Elizabeth A. Edwards, Dunja Grbi'c-Galic, Stephen R. Hutchins, and Martin Reinhard. Get this from a library. Microbial degradation of alkylbenzenes under sulfate-reducing and methanogenic conditions: project summary.

[Harry S Beller; Robert S. VOL,SULFIDOGENIC TOLUENE DEGRADATION MATERIALSANDMETHODS Construction of microcosms and enrichment cultures. Mi-crocosms and enrichment cultures were prepared under strictly anaerobic conditions in an anaerobic glove box(Coy Laboratory Products, Inc., AnnArbor, Mich.).

The micro-cosms and enrichment cultures were contained in amber glass, ml, Cited by: 42 Microbial Oil Degradation Under Methanogenic Conditions for bacteria and archaea consistent with the syntrophic oxidation of alkanes to methanogenic precursors (acetate and hydrogen). This degradation was inhibited by the addition of accessory electron acceptors (oxygen, nitrate, sulfate), indicating acclimation of the microbial community to methanogenic conditions.

Microbial degradation of toluene under sulfate-reducing conditions and the influence of iron on the process Microbial degradation of alkylbenzenes under sulfate-reducing and methanogenic. Methanogenic oil degradation, on the other hand, does not require external electron acceptors and leads to less overall souring of the oil reservoir.

Several studies have described in vitro methanogenic degradation of crude oil related compounds [19, 20] Jones et al., ), including n-alkanes [21, 20] and aromatic hydrocarbons. Microbial Degradation of Toluene Under Sulfate-Reducing Conditions--The Role of Iron EPA Grant Number: RC Subproject: this is subproject numberestablished and managed by the Center Director under grant R (EPA does not fund or establish subprojects; EPA awards and manages the overall grant for this center).

Methanomethylovorans were responsible for methanogenic degradation of TMAH in bioreactor. under sulfate reducing conditions, K. MomonoiInteraction between sulfate-reducing bacteria and methane-producing bacteria in UASB reactors fed with low strength wastes containing different levels of sulfate.

Water Res., 28 (), pp. However, oil degradation under sulfate-reducing conditions catalyzed by fermenting and syntrophic bacteria (reaction 1) and SRB using hydrogen or acetate as an electron donor for sulfate reduction (e.g., the genera Desulfovibrio and Desulfobacter) can also be.

Less soluble compounds, such as the alkanes have also been shown to be degraded under sulfate-reducing, nitrate-reducing, and methanogenic conditions (Widdel and Rabus, ). Cyclic alkanes have also been shown to be readily degraded under sulfate-reducing and methanogenic conditions (Townsend et al., ).

Other than that, little is known about the microbial populations involved in heavy oil degradation under methanogenic conditions (Bennett et al.,Xia et al.,Toth and Gieg, ).

In this study, we incubated and successively transferred a methanogenic enrichment culture capable of heavy oil degradation, obtained from the Shengli.

High abundance of single phylotypes has been found in other anaerobic, hydrocarbon-degrading enrichment cultures, for example with benzene under sulfate-reducing conditions (Musat and Widdel, ), or with alkylbenzenes and n-alkanes under denitrifying conditions (Rabus et al., ).

To test the ZVS production from sulfate reduction under different redox conditions, an anaerobic sequencing batch reactor (anSBR) was established and continuously operated for days in two stages, i.e., stage-I (from day 0 to day ) under sulfate reducing condition and stage-II (from day to day ) under methanogenic condition (Table S1).

The anaerobic hydrocarbon degradation has been reported to occur under nitrate-reducing, sulfate-reducing, iron-reducing and methanogenic conditions (for a. A microbial enrichment culture from marine sediment was able to grow on hexadecanone as the sole source of carbon and energy under sulfate-reducing conditions.

Oxidation of the ketone involved carboxylation reactions and was coupled to sulfide production. This enrichment culture also grew on 6,10,trimethylpentadecanone. Biodegradation was already reported under methanogenic conditions for micropollutants Trably et al.

;Barret et al. b), likewise under other anoxic conditions, i.e. sulfato-reducing or. Acetone degradation has been shown to occur in an enrichment culture under methanogenic conditions and also in pure cultures using nitrate (3, 24) or sulfate as the electron acceptor.

Higher ketones, such as butanone, pentanone, hexanone, and hexanone, were degraded anaerobically by pure cultures of denitrifying bacteria (24). Request PDF | Anaerobic Degradation of Paraffins by Thermophilic Actinobacteria under Methanogenic Conditions | Microbial anaerobic alkane degradation is a.

The reductive transformation of pentachloronitrobenzene (PCNB), an organochlorine fungicide, was investigated with a mixed, methanogenic culture developed from a contaminated estuarine sediment. Batch assays performed with this enrichment culture resulted in the biotransformation of PCNB to pentachloroaniline (PCA), which was then sequentially dechlorinated as follows: PCA →.

In addition to measurements of C 12 to C 26 n-alkanes in microcosms (), hydrocarbon degradation was also tracked using the ratio of nC 18 to phytane (2,6,10,tetramethylhexadecane) GC peak areas (Table 2; Fig.

4), where phytane is known to be more resistant to microbial degradation than straight chain sulfate-reducing microcosms approximately two thirds of total C 12 to C 26. A recent study on anaerobic ethylbenzene degradation under sulfate-reducing conditions resulted in the isolation of a novel organism, strain EbS7 (Kniemeyer et al.

). This strain is a member of the Deltaproteobacteria, most closely related to strain mXyS1, which can anaerobically oxidize toluene and m-xylene (Harms et al. b).