Current Status of the Degradation of Aliphatic and Aromatic Petroleum Hydrocarbons by Thermophilic Microbes and Future Perspectives

Nzila, Alexis

doi:10.20944/preprints201811.0166.v1

Cited by 12 publications

(2 citation statements)

References 58 publications

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“…According to the literature, the majority of microorganisms associated with thermophilic n‐ alkane degradation consist of the genera Geobacillus , Aeribacillus and Bacillus 46 . Likewise, in this study >50% of bacterial consortium were of the Bacillales order.…”

Section: Resultssupporting

confidence: 56%

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Thermophilic waste air treatment of n‐alkanes in a two‐phase bubble column reactor: the effect of silicone oil addition

Chalupa

Novák

Halecky

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND Thermophilic waste air biofiltration was developed to overcome the often observed drop in pollutant removal efficiency caused by classical reactor overheating above the mesophilic temperature range. To date, only a few studies have been reported on thermophilic biofiltration of airborne hydrophobic pollutants. In this work, a bubble column reactor (BCR) operated at 50 °C was used to treat waste air contaminated by a mixture of gasoline/kerosene range n‐alkanes with a microbial consortium acquired from burning coal dumps. RESULTS Several strategies were used to increase the low pollutant removal efficiency initially observed. Of these, only the addition of NAP (silicone oil) to the reactor led to increased removal efficiency, due to formation of water‐in‐oil emulsion. Analysis of the microbial consortium revealed bacteria from the Paenibacilaceae family (FN667384) and unidentified thermophilic fungi (HQ693517.1) to be the dominant organisms within the analyzed category, with 48% and 99% abundance, respectively. In the presence of NAP, longer‐chain n‐alkanes (C10–C12) were degraded efficiently, unlike their shorter‐chain homologs. After 7–10 days, the degradation of shorter‐chain C7–C8 n‐alkanes was observed at the expense of their longer‐chain homologs. CONCLUSION A two‐phase thermophilic BCR proved successful in treating an airborne n‐alkane mixture. With the NAP addition, the apparent mass transfer limitations were overcome, creating a suitable environment for thermophilic hydrocarbon biodegradation. As a result, efficient degradation of longer‐chain n‐alkanes was enabled upon emulsification, whereas the removal of shorter‐chain C7–C8 hydrocarbons occurred later, most likely as a consequence of the biomass adaptation. © 2021 Society of Chemical Industry

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Section: Resultssupporting

confidence: 56%

“…Thermophiles, however, do possess the AlkB enzymatic system, similar to mesophiles, based on integral membrane non‐heme diiron monooxygenases 46 . Within this system, two types of specific alkane hydrolases (pAHs) are known.…”

Section: Resultsmentioning

confidence: 99%

Thermophilic waste air treatment of n‐alkanes in a two‐phase bubble column reactor: the effect of silicone oil addition

Chalupa

Novák

Halecky

et al. 2021

J of Chemical Tech & Biotech

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Potential Utilization of Bacterial Consortium of Symbionts Marine Sponges in Removing Polyaromatic Hydrocarbons and Heavy Metals, Review

Marzuki

Rosmiati²,

Mustafa³

et al. 2023

Biology

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Toxic materials in waste generally contain several components of the global trending pollutant category, especially PAHs and heavy metals. Bioremediation technology for waste management that utilizes microorganisms (bacteria) has not been fully capable of breaking down these toxic materials into simple and environmentally friendly chemical products. This review paper examines the potential application of a consortium of marine sponge symbionts with high performance and efficiency in removing PAHs and heavy metal contaminants. The method was carried out through a review of several related research articles by the author and published by other researchers. The results of the study conclude that the development of global trending pollutant (GTP) bioremediation technology could be carried out to increase the efficiency of remediation. Several types of marine sponge symbiont bacteria, hydrocarbonoclastic (R-1), metalloclastic (R-2), and metallo-hydro-carbonoclastic (R-3), have the potential to be applied to improve waste removal performance. A consortium of crystalline bacterial preparations is required to mobilize into GTP-exposed sites rapidly. Bacterial symbionts of marine sponges can be traced mainly to sea sponges, whose body surface is covered with mucus.

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Contribution of Yeast Extract, Activated Carbon, and an Electrostatic Field to Interspecies Electron Transfer for the Bioelectrochemical Conversion of Coal to Methane

Piao

Song

et al. 2019

Energies

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The bioelectrochemical conversion of coal to methane was investigated in an anaerobic batch reactor containing yeast extract and activated carbon. In anaerobic degradation of coal, yeast extract was a good stimulant for the growth of anaerobic microorganisms, and activated carbon played a positive role. An electrostatic field of 0.67 V/cm significantly improved methane production from coal by promoting direct and mediated interspecies electron transfers between exoelectrogenic bacteria and electrotrophic methanogenic archaea. However, the accumulation of coal degradation intermediates gradually repressed the conversion of coal to methane, and the methane yield of coal was only 31.2 mL/g lignite, indicating that the intermediates were not completely converted to methane. By supplementing yeast extract and seed sludge into the anaerobic reactor, the intermediate residue could be further converted to methane under an electrostatic field of 0.67 V/cm, and the total methane yield of coal increased to 98.0 mL/g lignite. The repression of the intermediates to the conversion of coal to methane was a kind of irreversible substrate inhibition. The irreversible substrate inhibition in the conversion of coal to methane could be attenuated under the electrostatic field of 0.67 V/cm by ensuring sufficient biomass through biostimulation or bioaugmentation.

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Current Status of the Degradation of Aliphatic and Aromatic Petroleum Hydrocarbons by Thermophilic Microbes and Future Perspectives

Cited by 12 publications

References 58 publications

Thermophilic waste air treatment of n‐alkanes in a two‐phase bubble column reactor: the effect of silicone oil addition

Thermophilic waste air treatment of n‐alkanes in a two‐phase bubble column reactor: the effect of silicone oil addition

Potential Utilization of Bacterial Consortium of Symbionts Marine Sponges in Removing Polyaromatic Hydrocarbons and Heavy Metals, Review

Contribution of Yeast Extract, Activated Carbon, and an Electrostatic Field to Interspecies Electron Transfer for the Bioelectrochemical Conversion of Coal to Methane

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