Fractionation of oily sludges produced in the treatment of hydrocarbon wastes

Oliveira, Ana Paula de; Gonçalves, Margarida; Nobre, Crisiana de Andrade; Mendes, Benilde Simões; Vilarinho, Cândida; Castro, F.

doi:10.1201/b18853-33

WASTES 2015 – Solutions, Treatments and Opportunities 2015

DOI: 10.1201/b18853-33

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Fractionation of oily sludges produced in the treatment of hydrocarbon wastes

Ana Paula de Oliveira¹,

Margarida Gonçalves²,

Crisiana de Andrade Nobre³

et al.

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2019

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“…This is not surprising since each oil sludge composition is unique, and depends on the origin of the oil sludge (Viana et al, 2015). Consequently, the physicochemical characteristics vary according to the nature of the oil (Oliveira et al, 2015) and the formation process and storage of the oil sludge (Kadiev et al, 2015). Generally, the sediment content is less than the oil and water contents.…”

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Characterisation of oil sludges from different sources before treatment: High-field nuclear magnetic resonance (NMR) in the determination of oil and water content

Ramírez

Kowalczyk

Collins

2019

Journal of Petroleum Science and Engineering

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potentially toxic elements (PTEs) are believed to come from oil additives (de Souza et al., 2014).da Silva et al. (2012) reported that the composition of oil sludge is about 30 to 90% water, 4 to 7% sediments, and to 60% oil. However, Saikia et al. (2003) stated that the typical composition of oil sludge is 30-50% water, 10-12% sediments and solids, 30-50% oil. Yang et al. (2005), Zhang et al. (2012), and Long et al. (2013 have agreed that oil sludge is usually composed of 30-70% water, 2 to 15% sediments and solids, and 30-90% oil. Moreover, Egazar'yants et al. (2015) mentioned that oil sludges can have approximately 10 to 56 wt.% organic materials, 30 to 85 wt.% water and 1 to 46 wt.% solids or sediments. This shows that there is no uniform agreement among authors on the detailed oil sludge composition. This is not surprising since each oil sludge composition is unique, and depends on the origin of the oil sludge (Viana et al., 2015). Consequently, the physicochemical characteristics vary according to the nature of the oil (Oliveira et al., 2015) and the formation process and storage of the oil sludge (Kadiev et al., 2015). Generally, the sediment content is less than the oil and water contents. The oil usually had higher aliphatic hydrocarbon percentages (40-60%) than the aromatic hydrocarbon percentages (25-40%) (Shie et al., 2004, Speight, 2006. This wide variation in the composition of oil sludges has significant implications on the characterisation of oil sludges because different procedures and methods have been applied to study different types of sludges (Heidarzadeh et al., 2010, Wang et al., 2010, Zhang et al., 2011, Jasmine and Mukherji, 2015. In turn, this is extremely relevant for quick decision-making purposes regarding the appropriate treatment of this waste. Currently, the treatment of oil sludges is aimed to either reduce the contaminants in the sludge or to recover the oil. The former includes some methods such as encapsulation (Johnson et al., 2015), bioremediation (Wang et al., 2016, Roy et al., 2018), and incineration (Gong et al., 2017 whereas the latter, the oil recovery methods, include freeze/thawing (Hu et al., 2015), solvent extraction (Hu et al., 2017, * These elements are potentially toxic elements (PTEs) (Shaheen et al., 2016).Values in bold are over the limit of the acceptable standards of landfilling of hazardous waste established by the European Union: As (25 µg•g -1 ), Cd (5), Cr (70), Cu (100), Ni (40), Pb (50), Zn (200) (Kriipsalu et al., 2008). The mean values with the standard deviation (in parentheses) are shown (n = 3).

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Characterisation of oil sludges from different sources before treatment: High-field nuclear magnetic resonance (NMR) in the determination of oil and water content

Ramírez

Kowalczyk

Collins

2019

Journal of Petroleum Science and Engineering

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Fractionation of oily sludges produced in the treatment of hydrocarbon wastes

Cited by 1 publication

References 12 publications

Characterisation of oil sludges from different sources before treatment: High-field nuclear magnetic resonance (NMR) in the determination of oil and water content

Characterisation of oil sludges from different sources before treatment: High-field nuclear magnetic resonance (NMR) in the determination of oil and water content

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