Methods for Determination of Oil and Grease Contents in Wastewater from the Petroleum Industry

Cirne, Ilma; Boaventura, Jaime Soares; Guedes, Yuri; Lucas, Elizabete F.

doi:10.23939/chcht10.04.437

Cited by 16 publications

(10 citation statements)

References 7 publications

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“…The oil content in the samples was determined using a spectrophotometer following the methods described by Cirne et al [ 25 ]. For such, a calibration curve was created for different concentrations of oil in n-hexane.…”

Section: Methodsmentioning

confidence: 99%

Oily water treatment in a multistage tower operated under a novel induced pre-saturation process in the presence of a biosurfactant as collector

Santos

Silva

Brasileiro

et al. 2021

Biotechnology Reports

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Section: Methodsmentioning

confidence: 99%

Oily water treatment in a multistage tower operated under a novel induced pre-saturation process in the presence of a biosurfactant as collector

Santos

Silva

Brasileiro

et al. 2021

Biotechnology Reports

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“…Parameters such as chemical oxygen demand, total suspended solid (TSS), and volatile suspended solid (VSS) were analyzed according to the standard method for the Examination of Water and Wastewater APHA [25]. Fats, oil, and grease content were analyzed following the procedure reported by Cirne et al [26]. However, TSS samples were filtered through a 0.47 µm filter paper placed on a vacuum pump before the examination.…”

Section: Methodsmentioning

confidence: 99%

Performance Comparison of Conventional and Modified Upflow Anaerobic Sludge Blanket (UASB) Reactors Treating High-Strength Cattle Slaughterhouse Wastewater

Musa

Idrus

Man

et al. 2019

Water

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Cattle slaughterhouse wastewater (CSWW) with an average chemical oxygen demand (COD) and biochemical oxygen demand of 32,000 mg/L and 17,000 mg/L, respectively, can cause a severe environmental hazard if discharged untreated. Conventional upflow anaerobic sludge blanket (UASB) reactor is used in the treatment of slaughterhouse wastewater to meet the discharge standard limit of wastewater discharge set by the Department of Environment Malaysia (DOE). However, at higher loading rates the conventional systems are characterized by slow-growing microorganism resulting in long startup period, surface scum formation, and sludge washout. In this work, the performance of two laboratory scale (12 L) conventional (R1) and modified (R2) UASB reactors treating CSWW at mesophilic (36 ± 1 °C) condition were investigated. Both reactors were subjected to increasing organic loading rate (OLR) from 1.75 to 32 g L−1 day−1. The average COD, BOD5, and TSS removal efficiencies were ˃90%, at an OLR between 1.75 to 5 g L−1 day−1. The study revealed that R1 drastically reduced to 50, 53, and 43% with increasing OLR until 16 g L−1 day−1, whereas R2 maintained 76, 77, and 88% respectively, under the same OLR. Sign of reactor instability was very much pronounced in R1, showing poorly active Methanosaeta spp., whereas R2 showed a predominantly active Methanosarcina spp.

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“…50−54 Nevertheless, it must be considered that the emission intensity of samples with complex composition, such as crude oils, will depend on the amount of molecules that can be excited, for example, aromatics, alkyl-aromatics, and polyacromatic hydrocarbons (PAHs), requiring calibration curves for each kind of oil. 32 A previous work 55 demonstrated that different techniques to determine TOG provide different results which depends on the type of oil and the oil concentration in water. Although the work has used a wide spectrum of methods (fluorimetry, gravimetry, colorimetry, and infrared spectrometry), only two theoretical oil concentrations were evaluated (40 and 120 ppm), and the differences in the three crude oils studied were not reported.…”

Section: T H Imentioning

confidence: 99%

Correlation between Methods to Determine Total Oil and Grease in Synthetic Oily Water Using Heavy Oil: Gravimetry vs Fluorimetry

Silva

Melchuna³

et al. 2022

Ind. Eng. Chem. Res.

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The determination of total oil and grease (TOG) in water is important mainly for the petroleum industry due to the high amount of water coproduced with oil. Many countries establish regulations determining a maximum limit of TOG. In Brazil, for example, TOG should be measured by gravimetric methods. Other methodologies may be accepted when providing statistical correlation with the gravimetric method, which is extremely laborious, takes a long time to be performed, provokes great losses of material, produces relatively large standard deviations, and cannot be used in offshore oil platforms. Spectroscopy methods, such as fluorimetry, can be used as a simpler alternative to determine TOG. However, consent of the regulation agency to use other methods requires an accurate statistical correlation between their results. In this work, TOG values determined by the gravimetric method (using two different extraction solvents: n-hexane and xylene) and fluorimetry (using n-hexane as the extraction solvent) were compared for oily water in the theoretical oil concentration range of 10 to 100 ppm, using a heavy oil to prepare the oily water. Good correlations were obtained for both gravimetry vs fluorimetry, both using n-hexane (R 2 = 0.9630), and gravimetry using xylene vs fluorimetry using n-hexane (R 2 = 0.9857). Moreover, TOG measured by fluorimetry was closer to the real oil concentrations. Therefore, although a specific correlation must be obtained for each kind of crude oil, fluorimetry is a simple, fast, and accurate method, and the correlation is relatively simple to obtain.

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Methods for Determination of Oil and Grease Contents in Wastewater from the Petroleum Industry

Cited by 16 publications

References 7 publications

Oily water treatment in a multistage tower operated under a novel induced pre-saturation process in the presence of a biosurfactant as collector

Oily water treatment in a multistage tower operated under a novel induced pre-saturation process in the presence of a biosurfactant as collector

Performance Comparison of Conventional and Modified Upflow Anaerobic Sludge Blanket (UASB) Reactors Treating High-Strength Cattle Slaughterhouse Wastewater

Correlation between Methods to Determine Total Oil and Grease in Synthetic Oily Water Using Heavy Oil: Gravimetry vs Fluorimetry

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