Bioremediation of petroleum‐impacted soils from investigation‐derived wastes

Sylva, Traci Y.; Kinoshita, C.M.; Romano, Rowena T.; Toma, Marisa; Tsang, Shu Ki; Chang, Katherine

doi:10.1002/rem.10085

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…In situ bioremediation is generally easier to be carried out but, in the case of low permeability or particularly heterogeneous soils, it is not always effective . As an alternative, ex situ bioremediation processes resulted in efficient removal of pesticides, polycyclic aromatic hydrocarbons (PAHs), petroleum hydrocarbons, solvents, and so forth from polluted soils. − …”

Section: Introductionmentioning

confidence: 99%

On the Reduction of Power Consumption in Vortexing Unbaffled Bioslurry Reactors

Scargiali

Brucato

Micale

et al. 2020

Ind. Eng. Chem. Res.

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Bioremediation of polluted soils via bioslurry reactors is an interesting option among those available nowadays, especially when recalcitrant pollutants are present. Vortexing unbaffled stirred tanks may be a valuable choice to this purpose as they were recently found to be more efficient than baffled vessels for solid suspension processes where mixing time is not a controlling factor. When operated at sufficiently high agitation speeds, the central vortex bottom reaches the impeller and air bubbles start to be distributed throughout the system, thus avoiding any sparger and related clogging issues. In the present work, a vortexing unbaffled stirred tank with solid loadings ranging from 2.5% w/w (weight of the solid/weight of the liquid) up to the very high 160% w/w was studied. Different turbine types including Rushton turbine, up- and down-pumping pitched blade turbines, and A310 were investigated. The minimum impeller speeds for complete particles’ suspension (N js) and system aeration (N cr) along with the relevant power (P js , P cr) and specific power (per mass unit) consumptions (εjs, εcr) were assessed, in order to identify the geometrical configuration and operating condition providing the lowest power consumption. Results showed that the Rushton turbine and a solid concentration B of about 30% may be the most economically convenient arrangement to achieve system aeration and complete particles’ suspension at the same time inside the reactor.

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Section: Introductionmentioning

confidence: 99%

On the Reduction of Power Consumption in Vortexing Unbaffled Bioslurry Reactors

Scargiali

Brucato

Micale

et al. 2020

Ind. Eng. Chem. Res.

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“…Кількість виділеного СО2 характеризує процес повної мінералізації і максимальної утилізації вуглеводнів ґрунтовими мікроорганізмами [31]. Відомо, що у початковий період забруднення нафтою у ґрунті відбувається масове відмирання мікроорганізмів через токсичну дію легких фракцій, але поступово відбувається збільшення їх чисельності [32,33]. У нашому досліді встановлено, що емісія на забруднених ділянках чорнозему через добу після забруднення нафтою була у середньому на 40 % нижче, ніж на контролі (рис.…”

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Effect of oil contamination on the course of changes in chernozem properties and phytotoxicity

Krainiukov

Miroshnychenko

Sіabruk

et al. 2022

Visnyk of V.N. Karazin Kharkiv National University, Series Geology. Geography. Ecology

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Introduction. The consumption of hydrocarbons in the world is steadily growing with the response to the progress of civilization. It is accompanied by the continuous flow of hydrocarbon pollutants into the environment. Soil pollution with oil attracts special attention, because the soil is a key element in the trophic chain of toxicants in the human body. Purpose. Investigate changes in the properties (physicochemical, agrochemical and biological) of chernozem soils and its phytotoxicity at different levels of oil pollution for further use of the parameters of these indicators during soil monitoring. Research methods. The research was conducted during 2019-2021 in the conditions of the Left-Bank Forest-Steppe of Ukraine in a field small-plot experiment on Chernozem Luvic with the frequency of observations on diagnostic indicators at 1 month, 6, 12 and 24 months. The scheme of the experiment provided for soil contamination with oil in the amount of 0.4 l/m2, 1.6 l/m2, 6.4 l/m2, 25.6 l/m2. Results. The rate of biodegradation of oil products for different levels of pollution of Chernozem Luvic was determined - with insignificant pollution, self-purification of the soil is characterized by a faster course than with medium and strong, within 24 months the content of hydrocarbons decreased by 85-87% and 60-64%, respectively. One of the important mechanisms for the loss of hydrocarbons from the soil surface is microbiological decomposition, studies have shown that in the oil concentration range of 6.4-24.6 l/m2, there was a significant increase in the intensity of carbon dioxide release from the soil, which is 60% higher than in the control option, this indicates the intensification of the processes of its biodegradation. Studies of changes in such diagnostic indicators as soil pH, the content of water-soluble potassium and sodium show a less significant influence of the factor of soil pollution with oil compared to the influence of the time factor. However, these indicators are of great diagnostic value in the process of monitoring oil-contaminated soils and remediation, since the most optimal parameters of these indicators determine the suitability of soils for plant growth and microbial life. Studies of phytotoxicity of oil-contaminated soil have shown the negative impact of oil on seed germination in the field condition. Conclusions. The research results indicate a gradual self-purification of the soil from petroleum hydrocarbons during the observation period. The obtained regularities of the dynamics of changes in the studied parameters will be used to improve the scientific and methodological support for monitoring soils affected by oil pollution.

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Bioremediation of Coal Contaminated Soil under Sulfate-Reducing Condition

Kuwano

Shimizu²

2006

Environmental Technology

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The objective of this study was to investigate the biodegradation of coal-derived hydrocarbons, especially high molecular weight (HMW) components, under anaerobic conditions. For this purpose biodegradation experiments were performed, using specifically designed soil column bioreactors. For the experiment, coal-contaminated soil was prepared, which contains high molecular weight hydrocarbons at high concentration (approx. 55.5 mgC g-drysoil(-1)). The experiment was carried out in two different conditions: sulfate reducing (SR) condition (SO4(2-) = 10 mmol l(-1) in the liquid medium) and control condition (SO4(2-)<0.5 mmol l(-1)). Although no degradation was observed under the control condition, the resin fraction decreased to half (from 6,541 to 3,386 mgC g-soil(-1)) under SR condition, with the concomitant increase of two PAHs (phenanthrene and fluoranthene, 9 and 2.5 times, respectively). From these results, we could conclude that high molecular hydrocarbons were biodegradable and transformed to low molecular weight PAHs under the sulfate-reducing condition. Since these PAHs are known to be biologically degraded under aerobic condition, a serial combination of anaerobic (sulfate reducing) and then aerobic bioremediations could be effective and useful for the soil pollution by petroleum and/or coal derived hydrocarbons.

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Bioremediation of petroleum‐impacted soils from investigation‐derived wastes

Abstract: soils (PIS

Cited by 3 publications

References 10 publications

On the Reduction of Power Consumption in Vortexing Unbaffled Bioslurry Reactors

On the Reduction of Power Consumption in Vortexing Unbaffled Bioslurry Reactors

Effect of oil contamination on the course of changes in chernozem properties and phytotoxicity

Bioremediation of Coal Contaminated Soil under Sulfate-Reducing Condition

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