Smart light responsive polypropylene membrane switching reversibly between hydrophobicity and hydrophilicity for oily water separation

ABSTRACT Slop tanks are the focal point of the Load-On-Top system used on crude oil tankers to prevent pollution of the sea. Design of these tanks and their operating procedures strongly affect the degree of oil-water separation achieved. This paper presents the results of an investigation undertaken to define designs and procedures for improving separation and minimizing oil discharge to sea. The program was funded in part by the U.S. Maritime Administration. Based on tanker experience and laboratory tests with tank models, guidelines on capacity, structure, inlets, outlets, system design, and wastewater handling, procedures were developed. The guidelines aim at assuring successful Load-On-Top operations by (1) providing tanker operational flexibility for handling oily water, (2) minimizing the degree of oil-water mixing, (3) avoiding re-dispersion of separated oil during feeding and discharging operations, and (4) eliminating the possibility of accidental oil contamination. This investigation provides a basis for future large-scale or shipboard studies to improve the performance of slop tanks on existing tankers as well as on future tankers.

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Oily Water Treatment Using Ceramic Membrane in Presence of Swirling Flow Induced by a Tangential Inlet via CFD

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.348.51 ◽

2014 ◽

Vol 348 ◽

pp. 51-57 ◽

Cited By ~ 2

Author(s):

Tássia Vieira Mota ◽

Helton Gomes Alves ◽

Severino Rodrigues Farias Neto ◽

Antônio Gilson Barbosa de Lima

Keyword(s):

Ceramic Membrane ◽

Volume Fraction ◽

Ceramic Membranes ◽

Particle Model ◽

Water Separation ◽

Significant Difference ◽

Oil Water Separation ◽

Oily Water ◽

Oil Water ◽

Tangential Inlet

In recent years, attention has been given to the processes controlling the emission of oily effluents and their environmental impact. Many industrial processes generate large volumes of water contaminated with oil, called oily waters. The oily water must be treated before its discard in order to meet the criteria established by environmental agencies (for example in Brazil, 20 mg/L). In present days, the process of separating oil/water with ceramic membranes has attracted the attention of many researchers [1,2]. In this sense, the aim of this study is to evaluate the influence of the tangential inlet shape in the oil/water separation via ceramic membranes. We use a mathematical multiphase flow model to describe the oil-water separation, based on the particle model. Here oil is the dispersed phase while water the continuous phase. To model the turbulence effect we use the RNGk-εmodel. All simulations were carried out using the Ansys CFX ® commercial code. Results of streamlines and velocity, pressure and volume fraction of phase fields are present and analyzed. The numerical results indicate that no significant difference when using a circular or rectangular pipe with the same cross-sectional area.

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Feasibility Study on Membrane Technology for Ship Oil-Water Separation in China

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1092-1093.856 ◽

2015 ◽

Vol 1092-1093 ◽

pp. 856-861

Author(s):

Ou Chen Cai ◽

Jun Feng Chen ◽

Wei Zhang

Keyword(s):

Membrane Filtration ◽

Membrane Technology ◽

Preliminary Treatment ◽

Water Separation ◽

Oil Water Separation ◽

Oil Concentration ◽

Oily Water ◽

Oil Water ◽

Oily Water Treatment ◽

Filtration Device

The case study of membrane technology applied in oily water treatment in petrochemical industry demonstrated that it is also technically feasible in ship oil-water separation in China. Based on the analysis of the membrane technological parameter selection, a practical ship oil-water separator has been designed, which consists of two-stage devices, a preliminary treatment device and a membrane filtration device for advanced treatment. The pore size and the hydrophilicity of the membrane should be decided by the influent oil content; the operating temperature could be the influent temperature; the TMP should be controlled at 0.1-0.2 MPa; the influent oil concentration and flux should be modified by the preliminary treatment device so they are appropriate for the membrane filtration device.

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Formation of Mg(OH)2 dynamic membranes for oily water separation: effects of operating conditions

Desalination ◽

10.1016/j.desal.2005.06.042 ◽

2006 ◽

Vol 191 (1-3) ◽

pp. 344-350 ◽

Cited By ~ 28

Author(s):

Yijiang Zhao ◽

Yi Tan ◽

Fook-Sin Wong ◽

A.G. Fane ◽

Nanping Xu

Keyword(s):

Operating Conditions ◽

Water Separation ◽

Dynamic Membranes ◽

Oily Water

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Prediction of oily water separation efficiency by fiber beds using a new filter media property

Hemijska industrija ◽

10.2298/hemind180327017s ◽

2018 ◽

Vol 72 (5) ◽

pp. 253-264

Author(s):

Dunja Sokolovic ◽

Milica Hadnadjev-Kostic ◽

Arpad Kiralj ◽

Radmila Secerov-Sokolovic

Keyword(s):

Pilot Plant ◽

Separation Efficiency ◽

Industrial Applications ◽

Polymer Fibers ◽

Filter Media ◽

Water Separation ◽

Mineral Oils ◽

Wetting Property ◽

Oily Water ◽

Selection Of

Bed coalescers are compact, easy to install, automate, and maintain with the ability to achieve high separation efficiencies. They have been increasingly applied in the industry even though their design often requires pilot plant experiments. In this paper, a new wetting property of polymer fibers regarding polar mineral oils was established. This property can be important for selection of filter media for liquid-liquid separation in many industrial applications. Medical oil was selected as the new reference liquid that does not wet the investigated polymers. The lipophilic/lyophobic ratio (LLR) reached values ranging from 3.28 to 18.81 and increased with the increase of the mineral oil polarity measured by the oil neutralization number. The LLR values were in an excellent agreement with the results obtained from the separation efficiency of a steady-state bed coalescer. Thus, simple, fast and inexpensive experiments can replace pilot plant or at least laboratory testing aiming at selecting a polymer for oil separation from wastewater.

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Technical requirements of the IMO international performance and test specifications for shipboard oil pollution instrumentation for oily water separation, monitoring and control

Pollution Control Instrumentation for Oil and Effluents ◽

10.1007/978-94-009-3233-3_3 ◽

1987 ◽

pp. 40-65

Author(s):

H. D. Parker ◽

G. D. Pitt

Keyword(s):

Oil Pollution ◽

Monitoring And Control ◽

Water Separation ◽

International Performance ◽

Test Specifications ◽

Technical Requirements ◽

Oily Water ◽

And Control

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Analytical Examination of Oil/Water Separation by Coalescence

International Oil Spill Conference Proceedings ◽

10.7901/2169-3358-1973-1-403 ◽

1973 ◽

Vol 1973 (1) ◽

pp. 403-408 ◽

Cited By ~ 1

Author(s):

Stanley M. Finger ◽

T. S. Yu

Keyword(s):

Separation System ◽

Oil Viscosity ◽

Water Separation ◽

Physical Separation ◽

Solids Concentration ◽

Water Feed ◽

Oil Water Separation ◽

Oil Concentration ◽

Oily Water ◽

Oil Water

ABSTRACT The physical separation process of coalescence has been studied analytically under controlled conditions in regard to the separation of oil from oily water mixtures. Variations in coalescer performance were studied as a function of the oily water feed to a three stage prototype separation system of which coalescence was the final stage. The data were analyzed statistically and it was shown that increasing suspended solids concentration, increasing oil viscosity, and increasing oil concentration decreased coalescer element lifetime, however, above a certain level increasing oil concentration had no effect. Variations in the total flow rate in the range of one to four gallons per minute per square foot did not have a significant effect on coalescer element life. Under all conditions studied, the effluent water contained less than 15 parts per million oil, only ten percent of the samples analyzed contained more than this amount. The results indicate that coalescence is useful as a final polishing step in an oil/water separation system.

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