An Overview of the Current State and Prospects for Oil Recovery from Oily Sludge

Chinakulova Aigerim Nurlankyzy(1*), Niyazbekova Rimma Kalmanbayevna(2), Khaldun Mohammad Al Azzam(3), Mukhambetov Gabit Mukhambetovich(4), Aimagambetova Raushan Zhanatovna(5), El-Sayed Negim(6), Serekpayeva Mira(7)

(1) S. Seifullin Kazakh Agro Technical University, Nur-Sultan, Zhengis Ave 62, 010000, Kazakhstan
(2) S. Seifullin Kazakh Agro Technical University, Nur-Sultan, Zhengis Ave 62, 010000, Kazakhstan
(3) Pharmacological and Diagnostic Research Center (PDRC), Department of Pharmaceutical Sciences, Faculty of Pharmacy, Al-Ahliyya Amman University, Amman 19328, Jordan
(4) Economics, Kazakhstan Institute of Standardization and Metrology, Nur-Sultan, Prospekt Mangilik Yel. 11, 010016, Kazakhstan
(5) Department of Strategic Development and Science of the Kazakhstan Institute of Metrology and Standardization, Nur-Sultan, Astana, 010000, Kazakhstan
(6) School of Petroleum Engineering, Satbayev University, 22 Satpayev Street, 050013 Almaty, Kazakhstan
(7) S. Seifullin Kazakh Agro Technical University, Nur-Sultan, Zhengis Ave 62, 010000, Kazakhstan
(*) Corresponding Author


Oily sludge is a solid emulsified waste created by the petroleum industry. Solid particles, crude oil, and water comprise most of their composition. Because it contains high concentrations of cycloalkanes, benzene series, polycyclic aromatic hydrocarbons, and other harmful and hazardous substances, it poses a severe risk to human health and the environment. It must be treated to reduce its toxicity. However, crude oil is a significant component of oily sludge and has a high recycling value. As a result, numerous procedures for extracting crude oil from oily sludge have been developed, including solvent extraction, pyrolysis, centrifugation, ultrasonic treatment, electronic treatment, flotation, supercritical treatment, and combination processes. The primary purpose of this review is to describe the evolution of various recycling technologies and to compare their benefits, drawbacks, and ways of action. This concept is expected to be the cornerstone for future recycling technology development.


oily sludge; petroleum industry; hazardous; crude oil; toxicity

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