Biodegradation of pyrene by a novel strain of Castellaniella sp. under denitrifying condition

Deng, Liujie; Ren, Yuan; Wei, Chaohai; Wang, Jianlong

doi:10.1016/j.jece.2020.104970

Cited by 19 publications

(6 citation statements)

References 87 publications

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“…Most of them belonged to the Firmicutes. Castellaniella , which is a member of the Proteobacteria group, has the capacity to improve oil extraction by producing gas ( Deng et al, 2020 ).…”

Section: Resultsmentioning

confidence: 99%

“…On the second day following nutrient injection (approximately 0.4 PV), there was a shift in the community structure of sampling sites 2 and 3 ( Figures 4A , B ). Exiguobacterium , which belongs to the hydrocarbon oxidizing bacteria and has the capacity for alkane degradation ( Deng et al, 2020 ), experienced significant activation. Exiguobacterium was the first to be activated after the injection of nutrients, which aligned with the anticipated ecological “food chain” succession in the reservoir ( Ma and Chen, 2018 ).…”

Section: Resultsmentioning

confidence: 99%

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Effects of nutrient injection on the Xinjiang oil field microbial community studied in a long core flooding simulation device

Cheng,

Fan,

Yun

et al. 2023

Front. Microbiol.

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Microbial Enhanced Oil Recovery (MEOR) is an option for recovering oil from depleted reservoirs. Numerous field trials of MEOR have confirmed distinct microbial community structure in diverse production wells within the same block. The variance in the reservoir microbial communities, however, remains ambiguously documented. In this study, an 8 m long core microbial flooding simulation device was built on a laboratory scale to study the dynamic changes of the indigenous microbial community structure in the Qizhong Block, Xinjiang oil field. During the MEOR, there was an approximate 34% upswing in oil extraction. Based on the 16S rRNA gene high-throughput sequencing, our results indicated that nutrition was one of the factors affecting the microbial communities in oil reservoirs. After the introduction of nutrients, hydrocarbon oxidizing bacteria became active, followed by the sequential activation of facultative anaerobes and anaerobic fermenting bacteria. This was consistent with the hypothesized succession of a microbial ecological “food chain” in the reservoir, which preliminarily supported the two-step activation theory for reservoir microbes transitioning from aerobic to anaerobic states. Furthermore, metagenomic results indicated that reservoir microorganisms had potential functions of hydrocarbon degradation, gas production and surfactant production. Understanding reservoir microbial communities and improving oil recovery are both aided by this work.

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“…Most of them belonged to the Firmicutes. Castellaniella , which is a member of the Proteobacteria group, has the capacity to improve oil extraction by producing gas ( Deng et al, 2020 ).…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Effects of nutrient injection on the Xinjiang oil field microbial community studied in a long core flooding simulation device

Cheng,

Fan,

Yun

et al. 2023

Front. Microbiol.

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“…Bacteria from Castellaniella were also identified as key denitrifying bacteria in this study. Denitrification by strains of Castellaniella has been widely reported (Pang and Liu, 2007; Spain and Krumholz, 2011; Deng et al, 2021). For example, the Castellaniella bacterium effectively reduces nitrate to gaseous nitrogen, thus reducing the nitrate concentration in sewage (Pang and Liu, 2007).…”

Section: Discussionmentioning

confidence: 99%

Distinct denitrifying phenotypes of predominant bacteria mould nitrous oxide metabolism in upland agricultural soils

et al. 2022

Preprint

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Denitrifying nitrous oxide (N2O) emissions in agroecosystems result from variations in microbial composition and soil properties. However, the microbial mechanisms of differential N2O emissions in agricultural soils are less understood. Microcosm experiments of two types of Chinese farmland soil were conducted with nitrate (250 mg/kg) and a combination of glucose (1000 mg/kg) and nitrate, and a case with no addition was used as the control. The results show that N2O accumulation in black soil (BF) was significantly higher than that in fluvo-aquic soil (FF) independent of carbon and nitrogen supply. The abundance of denitrifying genes was significantly higher in FF, but the ratios of genes responsible for N2O production (narG, nirS, and nirK) to the gene for N2O reduction (nosZ) did not significantly differ between the two soils. However, the soils showed obvious discrepancies in denitrifying bacterial communities. High accumulation of N2O was verified by the isolates of Rhodanobacter, which is predominant in BF due to its truncated denitrifying genes and lack of N2O reduction capacity. The dominance of complete denitrifiers such as Castellaniella in FF led to a rapid reduction in N2O and reduced N2O accumulation, as demonstrated when its corresponding isolate was inoculated into both studied soils. Therefore, the different phenotypes of N2O metabolism of the distinct denitrifiers maintained in the two soils caused their differing N2O accumulation. This knowledge could guide the regulation of the denitrifying bacterial community and the phenotypes of N2O metabolism in agricultural soils to reduce N2O emissions.

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“…They may have one (benzene, toluene, xylene, phenol), two (naphthalene) or several (anthracene, phenanthrene, pyrene) benzene rings. A number of current works report the degradation of aromatics in different media [124][125][126][127].…”

Section: Aromatic Hydrocarbonsmentioning

confidence: 99%

Bioremediation of Soil from Petroleum Contamination

et al. 2022

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Petroleum is the most common global fossil fuel. It is a complex multi-component system mainly composed of various hydrocarbons such as alkanes, cycloalkanes, mono-, bi- and polyaromatic compounds, resins and asphaltenes. In spite of humanity’s need for petroleum, it negatively affects the environment due to its toxicity. The ecological problem is especially serious at petroleum mining sites or during petroleum transportation. Since it is not possible to replace petroleum with less toxic fuel, ways to reduce the toxic impact of petroleum hydrocarbons on the environment need to be developed. This review addresses bioremediation, a biological approach to petroleum degradation, which is mainly performed by microbes. The pathways of degradation of alkanes, alkenes and aromatic hydrocarbons are presented in detail. The effects of temperature, aeration and the presence of biogenic elements on microbial degradation of petroleum are discussed. Plant–microbe interactions involved with the bioremediation of petroleum-polluted soils are specifically addressed. The data presented in this review point to the great potential of bioremediation practices for cleaning soils of petroleum.

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Biodegradation of pyrene by a novel strain of Castellaniella sp. under denitrifying condition

Cited by 19 publications

References 87 publications

Effects of nutrient injection on the Xinjiang oil field microbial community studied in a long core flooding simulation device

Effects of nutrient injection on the Xinjiang oil field microbial community studied in a long core flooding simulation device

Distinct denitrifying phenotypes of predominant bacteria mould nitrous oxide metabolism in upland agricultural soils

Bioremediation of Soil from Petroleum Contamination

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