Solid inoculants as a practice for bioaugmentation to enhance bioremediation of hydrocarbon contaminated areas

Li, Haoshuai; Li, Yang; Bao, Mutai; Li, Shudong

doi:10.1016/j.chemosphere.2020.128175

Cited by 15 publications

(8 citation statements)

References 48 publications

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“…Laboratory tests demonstrated that the bacterial strains remained viable after the lyophilization process, without losing their biodegradation potential. In accordance, Li et al [51] observed that the lyophilization process of a Bacillus strain kept the bacterial cells viable and had little effect on crude oil degradation capacity. In the present study, lyophilized strains displayed potential for hydrocarbon degradation either alone or combined in a consortium.…”

Section: Discussionsupporting

confidence: 59%

“…Nonetheless, the introduction of the lyophilized consortium accelerated the degradation of petroleum, a feature observed in some other studies. For instance, Li et al [51] observed a degradation of 44.2% of total saturated hydrocarbons after 30 days of applying freeze-dried cells of a Bacillus strain to remediate petroleum. The authors refer to the potential for applying this solid inoculum in ex-situ bioremediation techniques.…”

Section: Discussionmentioning

confidence: 99%

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Bioremediation of Petroleum Hydrocarbons in Seawater: Prospects of Using Lyophilized Native Hydrocarbon-Degrading Bacteria

et al. 2021

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This work aimed to develop a bioremediation product of lyophilized native bacteria to respond to marine oil spills. Three oil-degrading bacterial strains (two strains of Rhodococcus erythropolis and one Pseudomonas sp.), isolated from the NW Portuguese coast, were selected for lyophilization after biomass growth optimization (tested with alternative carbon sources). Results indicated that the bacterial strains remained viable after the lyophilization process, without losing their biodegradation potential. The biomass/petroleum ratio was optimized, and the bioremediation efficiency of the lyophilized bacterial consortium was tested in microcosms with natural seawater and petroleum. An acceleration of the natural oil degradation process was observed, with an increased abundance of oil-degraders after 24 h, an emulsion of the oil/water layer after 7 days, and an increased removal of total petroleum hydrocarbons (47%) after 15 days. This study provides an insight into the formulation and optimization of lyophilized bacterial agents for application in autochthonous oil bioremediation.

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Section: Discussionsupporting

confidence: 59%

Section: Discussionmentioning

confidence: 99%

Bioremediation of Petroleum Hydrocarbons in Seawater: Prospects of Using Lyophilized Native Hydrocarbon-Degrading Bacteria

et al. 2021

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“…Field mesocosm experiments conducted in coastal seawater showed that most of the petroleum hydrocarbons (>98%) were removed from the surface of seawater in 24 h [ 128 ]. Similarly, the addition of solid inoculants of freeze dried Bacillus subtilis LZ-2 bacteria enhanced the degradation rate of crude oil by 44.2% and 21.6% for total saturate and aromatic hydrocarbons, respectively [ 129 ]. These results highlight the potential of these approaches for bioremediation of hydrocarbons contained within the crude oil.…”

Section: Bacterial-mediated Degradation Of Petroleum Hydrocarbonsmentioning

confidence: 99%

Bacteria, Fungi and Microalgae for the Bioremediation of Marine Sediments Contaminated by Petroleum Hydrocarbons in the Omics Era

et al. 2021

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Petroleum hydrocarbons (PHCs) are one of the most widespread and heterogeneous organic contaminants affecting marine ecosystems. The contamination of marine sediments or coastal areas by PHCs represents a major threat for the ecosystem and human health, calling for urgent, effective, and sustainable remediation solutions. Aside from some physical and chemical treatments that have been established over the years for marine sediment reclamation, bioremediation approaches based on the use of microorganisms are gaining increasing attention for their eco-compatibility, and lower costs. In this work, we review current knowledge concerning the bioremediation of PHCs in marine systems, presenting a synthesis of the most effective microbial taxa (i.e., bacteria, fungi, and microalgae) identified so far for hydrocarbon removal. We also discuss the challenges offered by innovative molecular approaches for the design of effective reclamation strategies based on these three microbial components of marine sediments contaminated by hydrocarbons.

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“…This is a proven integrated approach to remediation (Adeola and Forbes 2021a , b ). Solid inoculants of LZ-2 bacteria were found to degrade hydrocarbons found in crude oil (Li et al 2021 ). Bioaugmentation was also the rationale behind the use of bacterial strains Rhodococcus rhodochrous and Nocardia farcinia to successfully break down crude oil in water bodies (Rodrigues et al, 2020 ).…”

Section: Existing and Emerging Remediation Approach For Crude Oil Pollutionmentioning

confidence: 99%

Crude oil exploration in Africa: socio-economic implications, environmental impacts, and mitigation strategies

et al. 2021

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Crude oil exploration is a source of significant revenue in Africa via trade and investment since its discovery in the mid-19th Century. Crude oil has bolstered the continent’s economy and improved the wellbeing of the citizenry. Historically, Africa has suffered from conflicts due to uneven redistribution of crude oil revenue and severe environmental pollution. Advancements in geophysical survey techniques, such as magnetic and gravity methods, to seismic methods, have made the commercial exploration of crude oil possible for some other countries in Africa apart from Nigeria, Angola, Algeria, Libya, and Egypt. The occurrence of organic-rich, oil-prone Type I, II, and mixed II/III kerogens in sedimentary basins and entrapment within reservoir rocks with intrinsic petrophysical properties are majorly responsible for the large deposits of hydrocarbon in Africa. The unethical practices by some multinational oil corporations have resulted in social movements against them by host communities and human rights groups. The unscrupulous diversion of public funds, award of oil blocks, and production rights to certain individuals have impaired economic growth in Africa. The over-dependence on crude oil revenues has caused the economic recession in oil-producing countries due to plummeting oil prices and global pandemic. Most host communities of crude oil deposits suffer from a lack of infrastructure, arable soils, clean water, and their functioning capabilities are violated by crude oil exploratory activities, without adequate compensations and remedial actions taken by oil companies and the government. Thus, this review examines crude oil exploration in Africa and provides insight into the environmental and socio-economic implications of crude oil exploration in Africa. Furthermore, this report highlights some recommendations that may ensure ethical and sustainable practices toward minimizing negative impacts and improving the quality of life in affected communities.

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Solid inoculants as a practice for bioaugmentation to enhance bioremediation of hydrocarbon contaminated areas

Cited by 15 publications

References 48 publications

Bioremediation of Petroleum Hydrocarbons in Seawater: Prospects of Using Lyophilized Native Hydrocarbon-Degrading Bacteria

Bioremediation of Petroleum Hydrocarbons in Seawater: Prospects of Using Lyophilized Native Hydrocarbon-Degrading Bacteria

Bacteria, Fungi and Microalgae for the Bioremediation of Marine Sediments Contaminated by Petroleum Hydrocarbons in the Omics Era

Crude oil exploration in Africa: socio-economic implications, environmental impacts, and mitigation strategies

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