scholarly journals Oily sludge degrading potentials of single and consortium of autochthonous bacterial species

2021 ◽  
Vol 8 (3) ◽  
pp. 093-101
Author(s):  
Nsikak A. Abraham ◽  
Lucky O. Odokuma ◽  
Gideon C. Okpokwasili
Keyword(s):  
Bacterial Population ◽  
Oil And Gas ◽  
Saturated Hydrocarbon ◽  
Bacterial Species ◽  
Oil And Gas Industry ◽  
Oily Sludge ◽  
Gas Industry ◽  
Emulsification Index ◽  
Single Culture ◽  
Sludge Waste

Oily sludge (OS) degrading potentials of single and consortium autochthonous bacterial population was carried out using standard analytical procedures. Three autochthonous bacterial species; Pseudomonas aeruginosa, Bacillus cibi and Bacillus subtilis were associated with the OS. The isolates exhibited varying OS utilizing and biosurfactant producing potentials. P. aeruginosa was the best OS utilizer while B. subtilis was the best biosurfactant producer (emulsification index of 15.6%). Degradation of the OS with single culture of the best OS utilizer (P. aeruginosa) and consortium of the best OS utilizer and best biosurfactant producer (B. subtilis) revealed that the consortium exhibited a remarkable potential to reduce the total petroleum concentration in the OS from 100.73 ppm to 41.39 ppm (58.91% degradation) as compared to 51.74 ppm (48.7% degradation) achieved by the single culture. The saturated fraction of the OS was the most susceptible to degradation followed by the aromatic faction while the NSO and asphaltene fraction were the least degraded. P. aeruginosa was able to reduce the saturated hydrocarbon content in the OS by 87.4% while a 95.5% reduction was recorded for the consortium. Similarly, the concentration of PAH in the OS was reduced from 27.94 ppm to 16.74 ppm by the single culture and 12.75 by the consortium. The potentials of these bacterial communities can be explored for broader use in remediating oily sludge contaminated soil as well as managing oily sludge waste in the oil and gas industry.

scholarly journals Toxicity of raw and bio slurry treated oily sludge on Nitrobacter species and Tilapia guineensis

2021 ◽  
Vol 8 (3) ◽  
pp. 087-092
Author(s):  
Nsikak A. Abraham ◽  
Lucky O. Odokuma ◽  
Gideon C. Okpokwasilli
Keyword(s):  
Bacterial Population ◽  
Oil And Gas ◽  
Bacterial Species ◽  
Cost Effective ◽  
Oil And Gas Industry ◽  
Bacterial Consortium ◽  
Oily Sludge ◽  
Gas Industry ◽  
Cost Effective Method ◽  
Sludge Waste

Toxicity of raw and bio-slurry treated oily sludge (OS) on Nitrobacter species was determined using standard analytical procedures. The total petroleum content of the OS was 116.44 ± 3.57 g/kg. The TPH was rich with Saturate (40.46 ± 0.73 %). This was followed by Aromatics (27.94 ± 0.50 %) and Asphaltenes (26.58 ± 0.90 %), while NSO fraction had the least proportion (5.75 ± 0.47 %). Contamination of coastal soil with the OS increased the residual TPH concentration in the soil from 5.0561 ppm to 24.2305 ppm. The OS-ladened soil were subjected to biodegradation using 1.5-litter borosilicate glass bioreactors bioaugmented with single population of known OS utilizer (Pseudomonas aeruginosa) and consortium of known OS utilizer and biosurfactant producing bacterial species (Bacillus subtilis). Findings revealed that he bioslurry augmented with the bacterial consortium reduced the concentration of the residual TPH in the soil to 6.313 ppm (73.95% reduction) while 11.5751 ppm (52.23%) was recorded for the single bacterial population. Findings also revealed that the consortium were able to remarkable reduce the toxicity of the raw OS (LC50 = 20.94 ppt) on Nitrobacter species. The LC50 for the consortium treated OS was 104.64 ppt while that of single bacterial population treatment was 36.25 ppt. The reduction in the toxicity of the OS treated with the bacterial consortium indicates the potentials of the synergistic action between the biosurfactant producer and OS utilizer to reduce OS toxicity. The findings of this study can be explored as a cost-effective method for oily sludge waste management in the Oil and Gas industry.

scholarly journals ESTIMATION OF PREVALENCE OF MAIN PERIODONTAL PATHOGENS AT WORKERS OF PETROCHEMICAL PRODUCTION WITH CHRONIC PERIODONTAL DISEASES

2018 ◽  
Vol 14 (2) ◽  
pp. 19-24
Author(s):  
Искандер Зайдуллин ◽  
Iskander Zaydullin ◽  
Денис Каримов ◽  
Denis Karimov ◽  
Миляуша Кабирова ◽  
...  
Keyword(s):  
Chronic Periodontitis ◽  
Oil And Gas ◽  
Periodontal Diseases ◽  
Bacterial Species ◽  
Clinical Signs ◽  
Oil And Gas Industry ◽  
Periodontal Pocket ◽  
Tooth Surface ◽  
Gas Industry ◽  
Production Factors

Background. Periodontitis is a complex, multifactorial inflammatory disease. The prevalence in the adult population is 80-98%. The onset of the disease and the progression of the inflammatory process is associated with the colonization of the subgingival tooth surface with parodontopathogenic microorganisms. Objectives. The purpose is to study the prevalence of five oral microbes in subgingival plaque samples: Aggregatibacter actinomycetemcomitans (Aa), Porphyromonas gingivalis (Pg), Tannerella forsythia (Tf), Treponema denticola (Td), Prevotella intermedia (Pi) in oil and gas industry employees with chronic periodontitis and identify the presence connection between the clinical manifestations of periodontitis and the microbial profile of periodontal pockets. Methods. The study of periodontal microbiota was carried out in 32 workers in oil and gas industry employees with chronic periodontitis and in 32 patients with chronic periodontitis diagnosed not working in this field. Genomic DNA was extracted and 5 bacterial species were detected using the polymerase chain reaction. Results. Oil and gas industry employees with chronic periodontitis have their own flow peculiarities associated with the systematic influence of production factors. The most prevalent microorganism is Pg (77%), the presence of which is significantly associated with an increase in the depth of the periodontal pocket (PPD), clinical attachment loss (CAL), and an increase in the bleeding on probing (BOP). The pathogenic effect was manifested in the presence of the following microorganisms - the formation of the periodontal pocket in combination of Tf and Td, Tf and Pi, CAL level - Tf and Td, increased BOP index - Pg and Tf. Conclusions. As a result of the study, a connection was established between the red and orange complex bacteria with the clinical signs of chronic periodontitis. There was no significant association between age, smoking and the clinic of chronic periodontitis. Significant impact on the development of inflammatory periodontal diseases in oil and gas industry employees have harmful production factors.

Deployment of Digital NDT Solutions in the Oil and Gas Industry

2020 ◽  
Vol 78 (7) ◽  
pp. 861-868
Author(s):  
Casper Wassink ◽  
Marc Grenier ◽  
Oliver Roy ◽  
Neil Pearson
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Gas Industry

What Does Rent Give to Federal Budget (on the Russia's Budget Dependence upon "Oil Dollars")

2004 ◽  
pp. 51-69 ◽  
Author(s):  
E. Sharipova ◽  
I. Tcherkashin
Keyword(s):  
Oil And Gas ◽  
Strong Dependence ◽  
Oil Prices ◽  
Federal Budget ◽  
Oil And Gas Industry ◽  
Gas Industry ◽  
Resource Rent ◽  
Tax Legislation ◽  
Russian Economy ◽  
The Government

Federal tax revenues from the main sectors of the Russian economy after the 1998 crisis are examined in the article. Authors present the structure of revenues from these sectors by main taxes for 1999-2003 and prospects for 2004. Emphasis is given to an increasing dependence of budget on revenues from oil and gas industries. The share of proceeds from these sectors has reached 1/3 of total federal revenues. To explain this fact world oil prices dynamics and changes in tax legislation in Russia are considered. Empirical results show strong dependence of budget revenues on oil prices. The analysis of changes in tax legislation in oil and gas industry shows that the government has managed to redistribute resource rent in favor of the state.

The Political Economy of Power: Approaches to the Analysis of Relationships between the State and Business in Russia

2011 ◽  
pp. 19-33
Author(s):  
A. Oleinik
Keyword(s):  
Oil And Gas ◽  
Road Construction ◽  
Oil And Gas Industry ◽  
Retail Trade ◽  
Business Community ◽  
The Political ◽  
Economic Power ◽  
Gas Industry ◽  
The Road ◽  
Ruling Elites

The article deals with the issues of political and economic power as well as their constellation on the market. The theory of public choice and the theory of public contract are confronted with an approach centered on the power triad. If structured in the power triad, interactions among states representatives, businesses with structural advantages and businesses without structural advantages allow capturing administrative rents. The political power of the ruling elites coexists with economic power of certain members of the business community. The situation in the oil and gas industry, the retail trade and the road construction and operation industry in Russia illustrates key moments in the proposed analysis.

Consideration of Geopolitical Challenges within the Analysis of Geoenvironmental Risks for Oil and Gas Development of the Russian Arctic

2019 ◽  
Vol 16 (6) ◽  
pp. 50-59
Author(s):  
O. P. Trubitsina ◽  
V. N. Bashkin
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Optimal Operation ◽  
The Arctic ◽  
Stage Model ◽  
Oil And Gas Development ◽  
Gas Industry ◽  
The Impact ◽  
Further Development ◽  
Geopolitical Risks

The article is devoted to the consideration of geopolitical challenges for the analysis of geoenvironmental risks (GERs) in the hydrocarbon development of the Arctic territory. Geopolitical risks (GPRs), like GERs, can be transformed into opposite external environment factors of oil and gas industry facilities in the form of additional opportunities or threats, which the authors identify in detail for each type of risk. This is necessary for further development of methodological base of expert methods for GER management in the context of the implementational proposed two-stage model of the GER analysis taking to account GPR for the improvement of effectiveness making decisions to ensure optimal operation of the facility oil and gas industry and minimize the impact on the environment in the geopolitical conditions of the Arctic.The authors declare no conflict of interest

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