Abstract :

Sludge oil is a by-product of crude oil processing that poses significant environmental and efficiency challenges in the oil and gas industry. This study aims to evaluate the effectiveness of using microbial consortia to address sludge oil, with a focus on the impact of agitation on oil recovery enhancement. An experimental and laboratory analysis approach was employed to implement bioremediation for cleaning sludge oil from crude oil tanks. Factors such as agitation conditions, types of microorganisms, environmental conditions, and handling time were evaluated to understand their effects on oil recovery efficiency. The experiment compared two conditions: microbial consortia in agitated and non-agitated systems. The results showed that the use of microbial consortia in an agitated system was significantly more effective in reducing sludge oil and enhancing oil recovery compared to the non-agitated system. Agitation was found to improve microbial circulation and nutrient distribution, contributing to an increase in sludge oil degradation by up to 17.1%. However, the success of this method was also influenced by the composition of the sludge oil and environmental conditions. This research contributes to the development of more effective solutions for managing sludge oil and improving oil recovery in the oil and gas industry. The results of this experiment can serve as a foundation for further research on optimizing bioremediation for different operational conditions and supporting environmental sustainability.

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Keywords :

Agitation, Bioremediation., Microbial consortium, oil recovery, Sludge oil.

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References :

1. Alfutaisi, A., Jamrah, A., Yaghi, B., and Taha, R. (2007): Assessment of alternative management techniques of tank bottom petroleum sludge in Oman, Journal of Hazardous Materials, 141(3), 557–564. https://doi.org/10.1016/j.jhazmat.2006.07.023
2. Atlas, R. M., and Bartha, R. (1992): Hydrocarbon Biodegradation and Oil Spill Bioremediation (Advances in Microbial Ecology), 287–338 in K. C. Marshall, ed., Advances in Microbial Ecology, Springer US, Boston, MA. https://doi.org/10.1007/978–1–4684–7609–5_6
3. Banat, I. M., Makkar, R. S., and Cameotra, S. S. (2000): Potential commercial applications of microbial surfactants, Applied Microbiology and Biotechnology, 53(5), 495–508. https://doi.org/10.1007/s002530051648

4. Cameotra, S. S., and Singh, P. (2008): Bioremediation of oil sludge using crude biosurfactants, International Biodeterioration & Biodegradation, 62(3), 274–280. https://doi.org/10.1016/j.ibiod.2007.11.009
5. Chen, H.-S., Zhang, Q.-M., Yang, Z.-J., and Liu, Y.-S. (2020): Research on Treatment of Oily Sludge from the Tank Bottom by Ball Milling Combined with Ozone-Catalyzed Oxidation, ACS Omega, 5(21), 12259–12269. https://doi.org/10.1021/acsomega.0c00958
6. Das, N., and Chandran, P. (2011): Microbial Degradation of Petroleum Hydrocarbon Contaminants: An Overview, Biotechnology Research International, 2011, 1–13. https://doi.org/10.4061/2011/941810
7. Ghazali, F. M., Rahman, R. N. Z. A., Salleh, A. B., and Basri, M. (2004): Biodegradation of hydrocarbons in soil by microbial consortium, International Biodeterioration & Biodegradation, 54(1), 61–67. https://doi.org/10.1016/j.ibiod.2004.02.002
8. Gomathi, T., Saranya, M., Radha, E., Vijayalakshmi, K., Prasad, P. S., and Sudha, P. N. (2020): Bioremediation: A Promising Xenobiotics Cleanup Technique (1st ed.), 3139–3172 in S. Kim, ed., Encyclopedia of Marine Biotechnology, Wiley. https://doi.org/10.1002/9781119143802.ch140

9. Hu, et al. 2013.Recent development in the treatment of oily sludge from petroleum industry: a review. Journal of Hazardous Materials. https://doi.org/10.1016/j.jhazmat.2013.07.069
10. Hasan, A. M. A., Kamal, R. S., Farag, R. K., and Abdel-raouf, M. E. (2024): Petroleum sludge formation and its treatment methodologies: a review, Environmental Science and Pollution Research, 31(6), 8369–8386. https://doi.org/10.1007/s11356–023–31674–3
11. Hu, G., Li, J., and Zeng, G. (2013): Recent development in the treatment of oily sludge from petroleum industry: A review, Journal of Hazardous Materials, 261, 470–490. https://doi.org/10.1016/j.jhazmat.2013.07.069
12. Huang, Q., Han, X., Mao, F., Chi, Y., and Yan, J. (2014): Effect of the Particle Surface on Oil Recovery from Petroleum Sludge, Energy & Fuels, 28(7), 4480–4485. https://doi.org/10.1021/ef500808x
13. Jiang, H., Wang, Y., Nie, C., Yan, F., Ouyang, X., and Gong, J. (2020): Oil Sludge Deposition in Storage Tanks: A Case Study for Russian Crude Oil in Mo-he Station, Applied Sciences, 11(1), 321. https://doi.org/10.3390/app11010321
14. Jing, G., Luan, M., and Chen, T. (2011): Prospects for development of oily sludge treatment, Chemistry and Technology of Fuels and Oils, 47(4), 312–326. https://doi.org/10.1007/s10553–011–0301–4
15. Kurniawan et al (2024). Dampak Modifikasi Inlet Pipa terhadap Pengurangan Akumulasi Sludge dalam Oil Storage Tank. Jurnal Ilmiah Universitas Batanghari Jambi. https://doi.org/10.33087/jiubj.v24i2.5293
16. Leahy, J. G., and Colwell, R. R. (1990): Microbial degradation of hydrocarbons in the environment, Microbiological Reviews, 54(3), 305–315. https://doi.org/10.1128/mr.54.3.305–315.1990

17. Hassanzadeh, et al (2018). Investigation of factors affecting on viscosity reduction of sludge from Iranian crude oil storage tanks. Petroleum Science. https://doi.org/10.1007/s12182–018–0247–9
18. Nugroho, A. (2010): BIODEGRADASI SLUDGE MINYAK BUMI DALAM SKALA MIKROKOSMOS: Simulasi Sederhana Sebagai Kajian Awal Bioremediasi Land Treatment, MAKARA of Technology Series, 10(2). https://doi.org/10.7454/mst.v10i2.427
19. Sabrina Yael Hochberg, B. Tansel, S. Laha. 2022. Materials and energy recovery from oily sludges removed from crude oil storage tanks (tank bottoms): A review of technologies. Journal of Environmental Management. https://doi.org/10.1016/j.jenvman.2022.114428
20. Sales Da Silva, I. G., Gomes De Almeida, F. C., Padilha Da Rocha E Silva, N. M., Casazza, A. A., Converti, A., and Asfora Sarubbo, L. (2020): Soil Bioremediation: Overview of Technologies and Trends, Energies, 13(18), 4664. https://doi.org/10.3390/en13184664
21. Shie, J.-L., Lin, J.-P., Chang, C.-Y., Wu, C.-H., Lee, D.-J., Chang, C.-F., and Chen, Y.-H. (2004): Oxidative Thermal Treatment of Oil Sludge at Low Heating Rates, Energy & Fuels, 18(5), 1272–1281. https://doi.org/10.1021/ef0301811

22. Shahsavari, E. et al. 2015. Bioremediation of Sludge Obtained from Oil/Biofuel Storage Tanks. Hydrocarbon and Lipid Microbiology Protocols. https://doi.org/10.1007/8623_2015_123
23. Suganthi, S. H., Murshid, S., Sriram, S., and Ramani, K. (2018): Enhanced biodegradation of hydrocarbons in petroleum tank bottom oil sludge and characterization of biocatalysts and biosurfactants, Journal of Environmental Management, 220, 87–95. https://doi.org/10.1016/j.jenvman.2018.04.120
24. Thong, O., Ibrahim, A., Abdul Rahim, H., Yong, W. J., and Ismail, N. (2021): Review of Crude Oil Extraction Methods from Petroleum Sludge, International Journal of Engineering Technology and Sciences, 8(1), 40–50. https://doi.org/10.15282/ijets.8.1.2021.1006
25. Tong Liu (2011): Isolation and characterization of a biosurfactant-producing bacterium from Daqing oilcontaminated sites, African Journal of Microbiology Research, 5(21). https://doi.org/10.5897/AJMR11.684
26. O, et al. 2013. Biological degradation of oil sludge: A review of the current state of development. African Journal of Biotechnology. https://doi.org/10.5897/AJB11.1139
27. Valentin-Paul Tudorache, N. Antonescu. (2024). Aspects Regarding of Oil Sludge Cleaning from Crude Storage Tanks Using Robots. Annals of the Academy of Romanian Scientists Series on Engineering Sciences. https://doi.org/10.56082/annalsarscieng.2024.1.88

28. Wang, et al. 2011. Potential Approaches to Improving Biodegradation of Hydrocarbons for Bioremediation of Crude Oil Pollution. Journal of Environmental Protection. https://doi.org/10.4236/JEP.2011.21005
29. Wang, S., Wang, X., Zhang, C., Li, F., and Guo, G. (2016): Bioremediation of oil sludge contaminated soil by landfarming with added cotton stalks, International Biodeterioration & Biodegradation, 106, 150–156. https://doi.org/10.1016/j.ibiod.2015.10.014

30. Xia, L., Gong, K., Wang, S., Li, J., and Yang, D. (2010): Microwave-Assisted Chemical Demulsification of Waterin-Crude-Oil Emulsions, Journal of Dispersion Science and Technology, 31(11), 1574–1578. https://doi.org/10.1080/01932690903269503
31. Zhang, J., Li, J., Thring, R. W., Hu, X., and Song, X. (2012): Oil recovery from refinery oily sludge via ultrasound and freeze/thaw, Journal of Hazardous Materials, 203–204, 195–203. https://doi.org/10.1016/j.jhazmat.2011.12.016