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- W2895978582 abstract "Worldwide the generation of oil sludges is approximately 160 million metric tonnes per annum. The washing of oil sludge with surfactant solutions can be used to recover the oil and reused as a feedstock for fuel production. There is a need to establish the influence of the surfactant type, concentration, and application (surfactant to oil sludge, S/OS) ratio to oil sludge for the maximisation of oil recovery. This study presented the oil recovery rates from the washing of an oil-water separator sludge using surfactants, Triton X-100, sodium dodecyl sulphate (SDS), Tween 80, rhamnolipid, and Triton X-114. The surfactants were characterised by critical micelle concentration (CMC), micelle size, and surface activity. A Taguchi experimental design was applied to reduce the number of experimental runs. In general, Triton X-100 and X-114, and rhamnolipid had higher micelle sizes and surfactant activities which resulted in higher oil recoveries. The key role of the surfactants in the washing was evidenced because the ORR values with the surfactants were significantly higher than the value with the control with no surfactant solution. The S/OS ratio was the factor with the largest effect on the Taguchi signal-to-noise ratio (an indicator of variation) of the oil recovery rate. The levels with the maximum recovery rate were 1:1 S/OS, 2CMC of surfactant concentration and Triton X-100 (32% ± 5), Triton X-114 (30% ± 7), and rhamnolipid (29% ± 8). In conclusion, less surfactant solution (1:1 S/OS) and low surfactant concentration (≤2CMC) provided the maximum oil recovery from this type of oil sludge. To our knowledge, no previous study with surfactants has reported low oil recovery values at high S/OS ratios in the oil sludge washing." @default.
- W2895978582 created "2018-10-26" @default.
- W2895978582 creator A5009106516 @default.
- W2895978582 creator A5046431848 @default.
- W2895978582 date "2018-12-01" @default.
- W2895978582 modified "2023-09-24" @default.
- W2895978582 title "Maximisation of oil recovery from an oil-water separator sludge: Influence of type, concentration, and application ratio of surfactants" @default.
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- W2895978582 doi "https://doi.org/10.1016/j.wasman.2018.10.016" @default.
- W2895978582 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30509571" @default.
- W2895978582 hasPublicationYear "2018" @default.