Removal Efficiency and the Mineralization Mechanism During Enhanced Bioventing Remediation of Oil-Contaminated Soils

Jia, Jianli; Zhao, Shenwei; Hu, Lei; Wang, Yapeng; Yao, Linying; Liu, Ying; Yuan, Zhipo

doi:10.15244/pjoes/63411

Cited by 7 publications

(4 citation statements)

References 21 publications

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“…To further reaffirm the above-stated, Jia et al (2016) noted that the removal of crude oil in soils in the sets of treatments was caused by volatilization and biodegradation. Still, biodegradation was the most effective removal process, accounting for more than 58% of the total removal and reached the highest removal efficiency with nutrient adjustment, as reported by Jia et al (2016). The non-responsive nature of some hydrocarbons to biological degradation accounts for the low removal efficiency of this recalcitrant group of hydrocarbons, which occurs at difficult intervals in the same treatment environment, hence reducing the TPH removal efficiency.…”

Section: Resultsmentioning

confidence: 75%

“…Also, volatilization was not considered in the process because the contaminant has less volatile components and considering low operating temperature and low flow intensities, these components have a negligible effect, according to the findings of Fingas (2004) and Ma et al (2014). To further reaffirm the above-stated, Jia et al (2016) noted that the removal of crude oil in soils in the sets of treatments was caused by volatilization and biodegradation. Still, biodegradation was the most effective removal process, accounting for more than 58% of the total removal and reached the highest removal efficiency with nutrient adjustment, as reported by Jia et al (2016).…”

Section: Resultsmentioning

confidence: 97%

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Application of biostimulation and bioventing system as bioremediation strategy for the treatment of crude oil contaminated soils

Anekwe,

Isa

2024

Soil Water Res.

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The purpose of this study was to evaluate the application of biostimulation and bioventing for the treatment of crude oil-contaminated soils. The research needed to check how various industrial biostimulants will perform in the treatment of contaminated soils and whether or not there is a synergetic effect that has to do with the stimulant composition. Soil samples used for this study were collected from South Africa. The soil samples were air-dried for 24 h and subsequently passed through a standard sieve of 2 mm screen. The soil consists of 79.32% sand (2.00-0.02 mm), 14.71% silt (0.02-0.002 mm) and 5.97% clay (< 0.002 mm). A microcosm system containing 1 kg of soil contaminated with crude oil (5% w/w) for biostimulation (BSTc) treatment was amended with varying ratios of municipal wastewater (MWW) and brewery wastewater (BWW) to investigate the possible synergy. The bioventing (BVTc) treatment involves the supply of atmospheric air to the bioreactors through the vadose zone for 30mins flow duration every 48 h intervals at ambient condition for 28 days. The BSTc and BVTc treatments recorded 48-58% and 54-75% total petroleum hydrocarbon (TPH) removal efficiencies, respectively, as the BWW amendment noted appreciable removal compared to MWW, while the control treatment recorded 35%. The result showed that the attempt to boost the TPH removal efficiency using the bioventing with the wastewater amendment was effective, as the presence of enough oxygen in the system resuscitated the activities of the microbial community for enhanced TPH biodegradation. This study inferred that combined bioventing and biostimulation techniques proved to be an effective bioremediation strategy for the treatment of crude oil contaminated soils and could serve as a vital tool towards the mitigation of pollution aftermath faced by communities involved in oil production and/or processing activities.

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Section: Resultsmentioning

confidence: 75%

Section: Resultsmentioning

confidence: 97%

Application of biostimulation and bioventing system as bioremediation strategy for the treatment of crude oil contaminated soils

Anekwe,

Isa

2024

Soil Water Res.

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“…However, the results of the current BVT study with 54.93% (BVT) and 65.41% (BVT and wastewater amendment) average TPH removal efficiencies correspond to the studies by [34] and [7] which reported 64.2% and 61.7% TPH removal efficiencies with bioventing after 12month and 28 days treatment period respectively while and appreciable removal efficiency of >75% was recorded with bioventing and organic amendment according to [7] after 28 days. Similarly, [13], [14] and [15] recorded >70% TPH removal with bioventing and nutrient amendment technique after 112, 210 and 120days treatment period accordingly while [35] and [36] reported an average of 60% and 65% TPH removal efficiencies with bioventing and nutrient supplement after 91 and 40-50days study period respectively. The study showed that wastewater can serve an effective organic stimulant while air-injection adequately provides an aerobic environment for appreciable TPH reduction and treatment of crude oil contaminated soils.…”

Section: B Discussionmentioning

confidence: 88%

Evaluation of the Application of Wastewater and Bioventing System for the Treatment of Crude Oil Contaminated Soils

2020

SETWM-20, ACBES-20 &Amp; EEHSS-20 Nov. 16-17, 2020 Johannesburg (SA)

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Environmental pollution is a form of land degradation which has contributed immensely to the reduction of available arable lands and could lead to the total annihilation of the ecosystem if not effectively mitigated. Bioremediation technology offers a biological means which provide an eco-friendly and cost-effective approach for soil remediation in contrast to physicochemical methods. This study aims to evaluate the application of wastewaters and air-injection for the treatment of crude oil contaminated soils. The treatment involves the amendment of crude oil contaminated soils with wastewaters at different ratios and the injection of atmospheric air. The results showed that the combined application of wastewater and air-injection was effective with 60-75% TPH removal efficiency while single application recorded 48-59% and 55% for wastewater and air-injection respectively. The study showed that the application of wastewater and air-injection can serve as a promising strategy for the remediation of crude oil contaminated soils..

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“…The soil permeability and humidity control the petroleum degradation by regulating vapour propagation, while the existence of air disturbance compounds disrupts the air injection fluency, and lastly, the oxygen availability regulates the aerobic biodegradation. These constraints can be overcome by adding nutrients and manipulating the soil moisture or applying ozonation [ 78 , 94 ]. Nutrients are essential energy for microbes to grow and degrade hydrocarbons, while ozonation is used to accelerate partial oxidation of recalcitrant pollutants into volatile vapours.…”

Section: Enhanced Bioremediation Studies In Cold Regionsmentioning

confidence: 99%

Bibliometric Analysis of Hydrocarbon Bioremediation in Cold Regions and a Review on Enhanced Soil Bioremediation

Yap

Zakaria

Zulkharnain

et al. 2021

Biology

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The increased usage of petroleum oils in cold regions has led to widespread oil pollutants in soils. The harsh environmental conditions in cold environments allow the persistence of these oil pollutants in soils for more than 20 years, raising adverse threats to the ecosystem. Microbial bioremediation was proposed and employed as a cost-effective tool to remediate petroleum hydrocarbons present in soils without significantly posing harmful side effects. However, the conventional hydrocarbon bioremediation requires a longer time to achieve the clean-up standard due to various environmental factors in cold regions. Recent biotechnological improvements using biostimulation and/or bioaugmentation strategies are reported and implemented to enhance the hydrocarbon removal efficiency under cold conditions. Thus, this review focuses on the enhanced bioremediation for hydrocarbon-polluted soils in cold regions, highlighting in situ and ex situ approaches and few potential enhancements via the exploitation of molecular and microbial technology in response to the cold condition. The bibliometric analysis of the hydrocarbon bioremediation research in cold regions is also presented.

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Removal Efficiency and the Mineralization Mechanism During Enhanced Bioventing Remediation of Oil-Contaminated Soils

Cited by 7 publications

References 21 publications

Application of biostimulation and bioventing system as bioremediation strategy for the treatment of crude oil contaminated soils

Application of biostimulation and bioventing system as bioremediation strategy for the treatment of crude oil contaminated soils

Evaluation of the Application of Wastewater and Bioventing System for the Treatment of Crude Oil Contaminated Soils

Bibliometric Analysis of Hydrocarbon Bioremediation in Cold Regions and a Review on Enhanced Soil Bioremediation

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