Acute Toxicity Test of Oilfield Wastewater on Bacterial Community of a Soil in Nigeria

Wemedo, S. A.; Obire, O.

doi:10.3923/rjet.2012.25.32

Cited by 6 publications

(5 citation statements)

References 5 publications

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“…Increased Petroleum activities, particularly in the Niger Delta has led to pollution stress on soil and surface water, due to the discharging of large quantities of oilfield wastewater without adequate treatment techniques [3,4]. Oilfield wastewater containing high organic and inorganic chemicals poses environmental problems.…”

Section: Introductionmentioning

confidence: 99%

Response of Soil Microorganisms to Oilfield Wastewater

Owhonka

Obire

2019

JAMB

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Environmental pollution resulting from oil exploitation and exploration has impacted negatively on the biodiversity of the affected areas. Therefore, this study investigated the response of soil microorganisms to oilfield wastewater. The oilfield wastewater and soil samples were collected from an onshore oil producing platform fortnightly for a period of three months and microbiological analyses were performed using standard methods. Soil around pond average counts for THB and HUB (Log10 CFU/g) were 7.32 to 7.35 and 4.16 to 4.22 respectively. Soil 80 m away from pond average range for THB and HUB were 7.38 to 7.40 and 3.32 to 3.34 respectively. For TF and HUF, Soil around the pond mean recorded 4.65 to 4.85 and 4.12 to 4.16 (Log10 CFU/g) respectively. Mean monthly counts for soil 80m away TF and HUF (Log10 CFU/g) were 5.03 to 5.05 and 3.26 to 3.34 respectively. Soil around the pond recorded lower total heterotrophic bacteria count and total fungi count but higher hydrocarbon utilizing bacteria and hydrocarbon utilizing fungi than soil 80 m away. There was significant difference (P<0.05) between the THB and HUB in the various samples. For the fungi count there was no significant difference (P>0.05) between TF and HUF in all the samples except in sample obtained from soil 80 m away from pond. Bacteria species isolated from the study include: Bacillus, Aeromonas, Micrococcus, Staphylococcus, Chryseomonas, Proteus, Pseudomonas, Klebsiella. Apart from Aeromonas and Chryseomonas the rest of the isolate were identified also as hydrocarbon utilizing bacteria. While fungi species isolated includes: Aspergillus fumigates, Aspergillus niger, Aspergillus flavus, Saccharomyces cerevisiae, Geotricum, Trichoderma, Fusarium and Penicillium. Hydrocarbon utilizing fungi that occurred includes: Aspergillus niger, Aspergillus flavus, Fusarium, Penicillium and Saccharomyces cerevisiae. The response of these microorganisms in the oil polluted environment suggests that the isolated bacteria and fungi could utilize the oil as energy and carbon source and could be effective in the cleanup of the polluted sites.

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Section: Introductionmentioning

confidence: 99%

Response of Soil Microorganisms to Oilfield Wastewater

Owhonka

Obire

2019

JAMB

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“…The results showed that the downstream had a higher heterotrophic bacteria count than the control, which was followed by the deck drainage, which had the lowest count. This is likely because less oilfield wastewater was dumped there than in the deck drainage [26][27][28][29]. The control point had the highest fungus count, which was followed by the upstream and downstream regions, respectively.…”

Section: Discussionmentioning

confidence: 99%

Impact of Oilfield Wastewaters from Soku Swamp Rig on the Population and Diversity of Microbes in Soku River in Niger Delta

Ntongha

Omokaro²

2023

JAMB

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Oilfield wastewater contains poisonous and dangerous compounds that harm microorganisms and the quality of the water. An ongoing environmental concern in the Niger Delta is the rapid deterioration of water quality brought on by oilfield wastewater discharged from Nigerian oil industry operations. For a period of two months, biweekly studies were conducted to evaluate the microbiological effects of oilfield effluent from the Soku swamp oil rig on the Soku River in Rivers State in the Niger Delta. A total heterotrophic bacterial count, a hydrocarbon-utilizing bacterial count, a total fungal count, a hydrocarbon-using fungal count, and a microflora count were all determined using water samples obtained from upstream, downstream, drilling points, Deck drainage, and a control point. Total heterotrophic bacteria (THB) counts ranged from 0.2 to 2.4 (log10cfu/ml), total fungal (TF) count ranged from 0.1 to 0.95 (log10cfu /ml), while the total hydrocarbon utilizing bacterial (THUB) count ranged from 0.01 to 0.25 (log10cfu/ml), and the total hydrocarbon utilizing fungal (THUF) count ranged from 0.01 to 0.85 (log10cfu/ml). A statistical study revealed no appreciable difference in THB between the sampling stations and the controls. Streptococcus spp., Bacillus spp., Pediococcus spp., Kurthia, Staphylococcus, and Micrococcus spp. were among the bacteria species isolated for the study. Aspergillus flavus, Penicillium adamatzii, Rhizopus oligosporus, and Penicillium spp. were among the fungi that were isolated. The study's bacterial and fungal counts showed how oilfield effluent affected aquatic microorganisms. The abundance of microorganisms that use hydrocarbons demonstrated that the water body under study had active native hydrocarbon utilizers that can be used in the bioremediation process.

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“…The Total Petroleum Hydrocarbon (TPH) content of the samples was assessed using Toluene extraction method as described by [21]. Five gram of the oily waste sample was measured into a beaker and 10 mL of toluene (Analar grade) was added to it.…”

Section: Physicochemical Analysis Of Samplesmentioning

confidence: 99%

Remediation of Oily Waste using Soil Organic Nutrient Stimulant

John

Eduok

Nwaugo

et al. 2021

JSRR

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Aims: This present study aim at assessing the efficacy of soil-organic nutrient stimulant in the remediation of oily waste. Study design: Preparation of Soil-goat dung mix was used as stimulant for the remediation of oily waste. Place and duration of study: The study was carried out at the Department of Microbiology University of Uyo, Uyo, Akwa Ibom state, Nigeria in the dry season months of January - March Methodology: Remediation of oily waste using soil - organic (goat dung) nutrient stimulant was assessed for 12 weeks using standard culture-dependent microbiological, chemical and enzyme activity assay procedures. Results: The results indicate increased counts of hydrocarbon utilizing bacteria, fungi and actinomycetes with remediation time. Microorganisms belonging to the genera Bacillus, Pseudomonas, Acinetobacter, Alcaligenes, Serratia, Penicillium, Aspergillus, Cladosporium, Rhodococcus, Nocardia and Streptomyces were recovered from the remediated waste. The pH of the soil-goat dung treatment ranged from 6.5 ± 0.02 to 7.1 ± 0.05. Enzyme activity by dehydrogenase and urease were higher than phenol oxidase with time. PAHs were below detectable limits (< 0.01) and reduction in total petroleum hydrocarbon was 99.3% for the remediated waste. Conclusion: Overall, enhanced microbial activities correlated positively with reduction in Total Petroleum Hydrocarbon and PAH composition which resulted in ecofriendly waste product. Soil-goat dung stimulant can therefore serve as a cheap alternative in the management of oily waste.

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Acute Toxicity Test of Oilfield Wastewater on Bacterial Community of a Soil in Nigeria

Cited by 6 publications

References 5 publications

Response of Soil Microorganisms to Oilfield Wastewater

Response of Soil Microorganisms to Oilfield Wastewater

Impact of Oilfield Wastewaters from Soku Swamp Rig on the Population and Diversity of Microbes in Soku River in Niger Delta

Remediation of Oily Waste using Soil Organic Nutrient Stimulant

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