Treatment of Oily Wastewater by Membrane Hybrid Processes

Coca-Prados, José; Gutiérrez, Gemma; Benito, José M.

doi:10.1007/978-94-007-5079-1_3

Cited by 13 publications

(6 citation statements)

References 81 publications

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“…The aqueous and oil phases were emulsified in a VWR (VDI 25) high shear mixer at 24,000 rpm for 1 min which corresponds to an energy density of 162 J/mL (see the Supporting Information for calculation). Under these conditions, an average oil drop size (D [4,3]) of 20 μm was formed and corresponds to the diameter of drops that are difficult to separate via physical methods. 5,6 2.2.…”

Section: Emulsion Preparationmentioning

confidence: 99%

“…During these procedures, cleaning products containing surfactants are used to remove compounds onboard like hydrocarbons (e.g., engine oil, diesel fuel, and lubricants) and particulates. 3,4 During cleaning operations, scrubbing and agitation can aid in the formation of O/W emulsions. The liquids and compounds are pumped through a series of pipes and tanks before collection in the bilge.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Dynamic Ageing on the Stability of Oil-in-Water Emulsions with Anionic and Nonionic Surfactants in High-Salinity Water

et al. 2023

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Oily wastewater in the bilge of ocean vessels (i.e., bilge water) makes oil removal difficult due to the generation of oil-in-water (O/W) emulsions. A ship’s motion can promote emulsification or coalescence, depending on the surfactant type and concentration. This study investigates the effects of motion on model bilge water O/W emulsions, which has yet to be published in the literature. Mineral oil, 0.42 M NaCl DI-water, and a nonionic surfactant (Triton X-100) or an anionic surfactant (sodium lauryl ether sulfate, SLES) served as a model bilge water emulsion. The stability was characterized under static and dynamic conditions via optical microscopy and light diffraction. Ship motion was mimicked using a three-dimensional rocker. Under static conditions, the surfactant-to-oil ratio (S/O) needed to stabilize the emulsions for up to 20 days was 0.2 for SLES and 0.1 for Triton X-100. During dynamic ageing at 12 rpm, the S/O to promote emulsification was 0.1 for SLES and 0.2 for Triton X-100. At 30 rpm, the S/O to promote emulsification was 0.02 for SLES and 0.1 for Triton X-100, suggesting a complex interplay between surfactant concentration and energy input. These results expand on existing knowledge of bilge water and potentially reducing ocean pollution.

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Section: Emulsion Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Dynamic Ageing on the Stability of Oil-in-Water Emulsions with Anionic and Nonionic Surfactants in High-Salinity Water

et al. 2023

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“…The formation of hybrid separation membranes/layers is similar to the preparation of the coating, but unlike the coating, the separation membrane/layer itself has the function of filtration and it is usually thicker than the coating. 129,130 TA can hybridize with tube-like substances like CNTs, or nanowire-like substances or nanosheet-like substances such as GO/MXene sheets, to form a hybrid membrane or a separation layer by self-assembly. 131 In this process, TA usually plays the role of binders or functional components, such as TA-ZIF-8@MXene metal–organic framework (MOF) composite membranes reported by Pu et al 132 The authors inserted TA-treated ZIF-8 into the space between the MXene layers, which can generate certain interlayer spacing (Fig.…”

Section: Surface Engineering Of Membranes By the Ta-based Coating For...mentioning

confidence: 99%

Tannic acid-based functional coating: surface engineering of membranes for oil-in-water emulsion separation

et al. 2022

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“…There are various methods for treating oily wastewater, such as electro sedimentation, supersonic demulsification, centrifugation, and chemical demulsification . Chemical demulsification plays a major role in treating of oily wastewater.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and performances for treating oily wastewater of polyether copolymers based on polyethyleneimine

Luo

Sun

2017

Polymers for Advanced Techs

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The demulsification of the oily wastewater generated in the oil recovery process is very important in the crude oil exploitation. In present work, 10 block copolymers based on polyethyleneimine were synthesized, and their performances for treating oily wastewater were studied. The evaluation of demulsification efficiency, the effects of temperature, and the dosage on the treatment of oily wastewater by prepared copolymers were also investigated. To explore the causes of the differences, the interface activity of prepared copolymer molecules at water-oil interface was investigated by the interfacial tension, and a mechanism diagram of demulsification of wastewater by the prepared copolymers was proposed. The demulsification of wastewater could be divided into 3 processes that were (1) adsorption, (2) congestion, and (3) coalescence. The prepared copolymer molecule acted as a hand in the oily wastewater to achieve the demulsification.

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Treatment of Oily Wastewater by Membrane Hybrid Processes

Cited by 13 publications

References 81 publications

Effect of Dynamic Ageing on the Stability of Oil-in-Water Emulsions with Anionic and Nonionic Surfactants in High-Salinity Water

Effect of Dynamic Ageing on the Stability of Oil-in-Water Emulsions with Anionic and Nonionic Surfactants in High-Salinity Water

Tannic acid-based functional coating: surface engineering of membranes for oil-in-water emulsion separation

Synthesis and performances for treating oily wastewater of polyether copolymers based on polyethyleneimine

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