— Total petroleum hydrocarbons contained in the oily sludge were measured as described by Tahhan et al. (2011) with slight modification. Briefly, 6 g of oily sludge were air-dried to a constant …
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— Sludge-based adsorbent (S-AB) converted by oily sludge can make full use of the precious resource. In this paper, oily sludge and discarded sawdust are used to prepare adsorbent through chemical activation. The …
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— A laboratory-scale study was conducted to investigate the effect of bioaugmentation (BA) and biostimulation (BS) on the remediation of oily sludge with high total petroleum hydrocarbon (TPH) content (269,000 mg/kg d.w. sludge). TPH concentration significantly decreased by 30.4% (P < 0.05) in the BS treatment after 13-week …
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Oily sludge is a byproduct of petroleum processing during oil exploitation, transportation, and refinery operations. It usually contains petroleum hydrocarbons, water, and solid particles. This means that oily sludge specimens have characteristics of both oil resources and hazardous waste (Chen et al. 2022). The hazardous substances include ...
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— Baiji oil refineries produce 3000–3500 m 3 /year of oily sludge. This sludge is hard to be biodegraded, contains large quantities of crude oil, and hard to be transported into landfill sites. The aim of the present work is to treat this oily sludge by solvent extraction in order to separate this sludge to many components that are easy to deal ...
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As a resource treatment method, pyrolysis realizes the recovery of oil and immobilization of heavy metals in oily sludge (OS). The results showed that the composition of OS had little effect on the trend of the whole pyrolysis process, but it had different effects on the mass loss and maximum weight loss rate at each pyrolysis stage. SEM–EDS results showed …
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— Oily sludge is a hazardous waste stream of oil refineries that requires an effective process and an environment-friendly route to convert and recover valuable products. In this study, the pyrolytic conversion of the wet waste oil sludge was implemented in an autoclave pyrolyzer and a thermogravimetric analyzer (TGA) at …
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— In the petroleum sector, the generation of oily sludge is an unavoidable byproduct, necessitating the development of efficient treatment strategies for both economic gain and the mitigation of negative environmental impacts. The intricate composition of oily sludge poses a formidable challenge, as existing treatment methodologies frequently fall …
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— The obtained OTU was searched and sorted by the Classifier program in the RDP database (https://rdp.cme.msu.edu/). According to the method published in 24, the microbial community ACE, Chao1, Shannon, Simpson diversity indices, ... The oily sludge was degraded by SMFC in 21 days, and the TPH degradation efficiency was 10.1 times …
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— Solvent extraction is a technology that completely mixes the oily sludge with the extraction solvent in a certain proportion, removes solid particles, water and other impurities in the mixture, distills the mixture, and separates and recovers the crude oil in the sludge from the extractant (Fig. 5).This method is based on the similar phase solution …
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— 1. Introduction. Upstream oily sludge is the most significant solid waste generated in the oil production industry, and is mainly discharged from the crude oil storage process [1,2].Ordinarily, crude oil is housed in oil tanks prior to being refined to petroleum products, and the heavier species are separated and settled at the bottom of the storage …
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— A very promising direction in the development of new technologies for the processing of oily sludge is the combination of physicochemical, mechanical, magnetic and other methods of desludging with ...
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— 1. Introduction. Oily sludge is widely present in the petroleum industry, e.g. drilling mud, soil contaminated by oil spill, and sediment in crude oil storage tanks (Antes et al., 2015; Ablieieva and Leonid, 2016).Oily sludge is generally composed of petroleum hydrocarbons (PHCs), solids, water, and metal impurities (Biswal et al., 2009), posing a …
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— This paper provides an introduction to the origin, properties, and hazards of oil sludge while summarizing various treatment methods focused on reduction, recycling, …
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— Currently, the mechanical separation is widely employed to treat oily sludge in China. We use a reported operation at an oil generation plant in Heilongjiang as an example (Liu and Wang, 2016) and establish a material flow diagram for this microlevel.Through original data collection and estimations of the generation, primary treatment, further …
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and Rosenfeld 2010;Lodungietal.2016). The oily sludge produced during the storage of crude oil is one of the most significant and unavoidable waste prod-ucts of oil production (Hu2016;Reis1996). Indeed, disposal of the oily sludge comprises of a significant cost in storage tank maintenance for producers, re-finers, and transporters of petroleum ...
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— Based on the analysis of the properties of oily sludge samples, the effect of modification parameters, such as liquid to solid (L/S) ratio, agitation temperature, agitation intensity, agitation time and pH on the modification of oily sludge was investigated with the content of oil remnants in dry sludge as a reference index. Remixing experiments were …
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— Oily sludge has been included to China's National Hazardous Waste Inventory due to its ignitability and toxicity [3]. Oily sludge typically comprises 15–50% petroleum hydrocarbons, 30–85% water, and 5–46% solid particles [4], giving it the dual characteristics of environmental risk and resource recovery potential.
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— Table 1 also compiles the physical compositions of oily sludge and the saturates, aromatics, resins and asphaltenes (SARA) analysis of its oil phase from different sources. Clearly, the water, oil and solid contents of oily sludge have a wide range of variations. Oily sludge is generally composed of 18.10–57.30 wt% water, 14.30–65.21 …
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— Oily sludge, as a critical hazardous waste, requires appropriate treatment for resource recovery and harmfulness reduction. Here, fast microwave-assisted pyrolysis (MAP) of oily sludge was conducted for oil removal and fuel production. The results indicated the priority of the fast MAP compared with the MAP under premixing mode, …
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— Total petroleum hydrocarbons contained in the oily sludge were measured as described by Tahhan et al. (2011) with slight modification. Briefly, 6 g of oily sludge were air-dried to a constant weight and triplicate 1 g samples of the air-dried oily sludge were consecutively extracted with 100 mL each of hexane, dichloromethane, and chloroform.
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— The oily sludge generated during these operations is a recalcitrant residue characterized by being a stable water-oil emulsion of water, solids, petroleum …
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— Oily sludge is a complex mixture of organic compounds and inorganic metalloids, of which the structure and bioavailability of these compounds resist natural degradation. ... that passed the screening process were then classified using the Ribosomal Database Project naïve Bayesian rRNA classifier at a confidence of 80%. The proportion …
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— Oily sludge contains high concentrations of total petroleum hydrocarbons and heavy metals, which seriously impact the environment and human health. How to dispose of and use the oily sludge has attracted an increasing amount of attention. This study introduces harmless and resource-based oily sludge treatment technologies. It …
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— A correct analysis of oily sludge characteristics is crucial for assessing its environmental impact and selecting appropriate treatment methods. Common indicators used to characterize oily sludge include oil content, water content, chemical oxygen …
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— The oily sludge is a semi-solid waste, typically consisting of 15–50% petroleum hydrocarbons, 30–85% water, and 5–46% solid particles. It contains various …
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— Oily sludge (OS) was extracted with petroleum ether (PE), methanol, carbon disulfide (CDS), acetone, and isometric CDS/acetone mixture (IMCDSAM), respectively, to obtain soluble species (E1–E5) and extraction residues (R1–R5). The soluble species were analyzed by gas chromatography/mass spectrometry (GC/MS), and the extraction …
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— The formation of oily sludge can be categorized into three types, i.e., landing sludge, refinery sludge, and tank bottom sludge (Chen et al. 2019; Wu et al. 2019). …
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