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

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.

An Investigation of Wavy Flow Passages on the Performance of Oil-Water Separators

2001 ◽  
Author(s):  
Michael A. Langerman ◽  
Chenoa J. Jensen
Keyword(s):  
Separation Efficiency ◽  
Continuous Phase ◽  
Industrial Applications ◽  
Spatial Density ◽  
Dispersed Phase ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Phase Water ◽  
Oil Particles

Abstract The purpose of this research is to analyze flow fields within channels bounded by wavy plates and assess the effects of these flow passages on the efficiency of oil-water separators. Results from this study are used to analytically assess an industry accepted result that wavy plate channel surfaces promote a more effective oil-water separation process. For this investigation, an uncoupled, two-dimensional, dispersed-phase, simulation is implemented using a commercially available computational fluid dynamics code. First, the continuous phase (water) velocity field is calculated. For comparison purposes, both fiat and wavy passages are simulated. Next, buoyant oil particles (specific gravity of 0.70 and 0.95) are superimposed as the dispersed phase at the inlet to the channel. Oil droplet diameters of 100, 200, and 300 μm, which are typical droplet diameters encountered in industrial applications, are simulated. The particle trajectories are then determined and observations made of the particle behavior near the channel walls for both channel geometries. Results show that a percentage of the particles are captured in vortices generated in the fluid within the wavy plate corrugations. As more particles are captured within these vortices, the spatial density of oil particles increases thus promoting coalescence. The coalescence results in larger oil particle diameters that, in turn, enhance separation through increased buoyancy. These results appear to substantiate industry observations regarding an increased oil-water separation efficiency using wavy channel passages. Nevertheless, more research is needed to optimize the design of the passages and better understand the coalescence phenomena.

An Oily-Water Separator System

1974 ◽  
Vol 11 (01) ◽  
pp. 61-65
Author(s):  
Daniel C. Garber
Keyword(s):  
Pilot Plant ◽  
Complete Separation ◽  
Water Mixture ◽  
Separation System ◽  
Physical Processes ◽  
Water Separation ◽  
Water Separator ◽  
Oily Water

This paper will discuss a unique (patent applied for) oily-water separation system for shipboard use. One pilot plant has already been placed on board an 80,000-ton tanker, the SS America Sun. In general, the system processes any oily-water mixture through its various components to effect essentially the complete separation of the oil and water using only physical processes and without any recourse to heat or chemicals.

scholarly journals Separation of Water in Diesel Using Filter Media Containing Kapok Fibers

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2667
Author(s):  
Qiang Song ◽  
Jian Kang ◽  
Min Tang ◽  
Yun Liang
Keyword(s):  
Separation Efficiency ◽  
Filter Medium ◽  
Water Repellent ◽  
Separation Performance ◽  
Filter Media ◽  
Polybutylene Terephthalate ◽  
Fiber Layer ◽  
Water Separation ◽  
Kapok Fibers ◽  
Low Sulfur

Traditional water-repellent filter media for water separation in diesel fail to meet requirements due to the high content of surfactants in low sulfur diesel and ULSD (ultra low sulfur diesel). To improve the water separation performance of filter media, a novel dual-layer filter medium was prepared by hydrophilic fibers (glass microfibers) and hydrophobic fibers (kapok fibers and bi-component PET fibers). The results showed that the separation efficiency of a filter medium (sample #2) with the upstream layer containing 20 wt% kapok fibers was 89.5%, which was higher than that of filter samples with the upstream layer containing 0 wt%, 40 wt%, 60 wt% and 80 wt% kapok fibers. When the interfacial tension (IFT) of water in diesel was 21 mN/m, 17 mN/m and 13 mN/m, the separation efficiency of filter sample #2 was 99.5%, 89.5% and 30.5%, respectively, which was 23.9%, 57.4% and 17.8% higher than that of the commercial water-repellent filter samples composed of a polybutylene terephthalate (PBT) fiber layer and cellulose fiber layer.

scholarly journals A Research Study of Development of Oil Skimmer for Sugar Industry

2021 ◽  
Vol 9 (VI) ◽  
pp. 3815-3821
Author(s):  
Ganesh N Kadam
Keyword(s):  
Water Quality ◽  
Water Treatment ◽  
Research Study ◽  
Separation Efficiency ◽  
Sugar Industry ◽  
Industrial Applications ◽  
Water Treatment System ◽  
Oily Water ◽  
Oily Water Treatment ◽  
Sewer Water

: In this paper includes the study of the Development of Oil Skimmer for the Sugar Industry. The utilization of skimmers in industrial applications is often needed to remove oils, grease, and fats before more treatment for environmental discharge compliance. Placed before an oily water treatment system, an oil skimmer could give greater overall oil separation efficiency for improved discharge sewer water quality.

In-Line Testing of Novel Filter Media for Oil-Water Mixtures

2019 ◽  
Author(s):  
Anisha Mule ◽  
Ramin Dabirian ◽  
Srinivas Swaroop Kolla ◽  
Ram Mohan ◽  
Ovadia Shoham
Keyword(s):  
Pressure Drop ◽  
Flow Rate ◽  
Oil Content ◽  
Separation Efficiency ◽  
Permeate Flux ◽  
Filter Media ◽  
Water Separation ◽  
Fibrous Filter Media ◽  
Oil Water ◽  
High Separation

Abstract A novel non-fibrous filter media is evaluated for in-line oil-water separation. Outside-in-crossflow configuration incorporating the filter media is utilized in order to test the filter. All experiments are conducted with a hydrophilic-olephobic filter for water-continuous flow with low oil concentrations. The collected experimental data include permeate flow rate and purity as well as pressure drop. Values of permeate flow rate and pressure drop are averaged over the duration of the experiments, which is about 5 minutes, constituting the “initial average” of the permeate flow rate and the corresponding pressure drop. Totally twelve experimental runs are conducted for mixture velocities of 0.038 m/s, 0.055 m/s and 0.066 m/s, and oil concentrations of 0.6%, 0.83%, 1.1%, 7.9% and 9.1%. Permeate samples are analyzed for oil content, demonstrating a high separation efficiency of 98 ± 2%. The permeate flux across the filter cartridge ranges between 0.0739 (L/h)/cm2 to 0.216 (L/h)/cm2 owing to the low pressure drop across to filter. Oil concentration in to permeate water samples shows consistently increasing trend with an increase in inlet oil content, while maintaining high separation efficiency for all runs. The pressure drop across the membrane under flowing conditions ranges from 0.35 psid to 0.6 psid for flow rates between 0.1 L/min and 0.29 L/min, respectively. Also the data confirm that the filter membrane breakthrough pressure is 0.35 psid.

Preparation of Superhydrophobic Coatings on Filter Paper for Oil-Water Separation

2020 ◽  
Vol 978 ◽  
pp. 492-498
Author(s):  
Sangeetha Sriram ◽  
R.K. Singh ◽  
Aditya Kumar
Keyword(s):  
Filter Paper ◽  
Separation Efficiency ◽  
Impact Resistance ◽  
Industrial Applications ◽  
Water Separation ◽  
Casting Technique ◽  
Prime Concern ◽  
Oil Water Separation ◽  
Oil Water ◽  
Filter Papers

Oil-water separation has become the prime concern for fossil fuel exploration industries. In the present study, superhydrophobic coating on filter paper was prepared to repellent water while allowing oil to flow freely from its porous structures. Coating was generated by solution-casting technique on cellulosic filter paper using silica nanoparticles (SiO2) along with silane coupler hexadecyltrimethoxysilane (HDTMS). The contact angle was measured, and it has shown 175.1° ± 1.5°, and the tilting angle is 1.5° ± 0.2°. The surface topography of coated and treated samples was also examined. Furthermore, thermal stability of fabricated filter papers was evaluated by annealing at a different range of temperatures (20 °C-220 °C). The pH resistance of the coatings were inspected by immersing the specimens in acidic and alkali solutions (pH 2-13). The mechanical durability was examined by tape-peeling and abrasion tests. Moreover, these samples have shown waterjet impact resistance. Filtration study was performed on coated filter papers using various oil-water mixtures of kerosene-water and petroleum ether-water and results have shown the separation efficiency of 99% and 98.5%, respectively. Thus these filter papers can have potential practical and industrial applications.

Pilot-plant experiments for improvement of polluted canal/klong water by rock-bed filtration

1997 ◽  
Vol 35 (8) ◽  
pp. 83-90
Author(s):  
Shigeo Fujii ◽  
Chiaki Niwa ◽  
Mitsuo Mouri ◽  
Ranjna Jindal
Keyword(s):  
Organic Matter ◽  
Pilot Plant ◽  
Horizontal Flow ◽  
Removal Mechanism ◽  
Soluble Organic Matter ◽  
Filter Media ◽  
Canal Water ◽  
Rock Bed ◽  
One Year ◽  
Filtration Technique

Applicability of the rock-bed filtration technique was investigated through pilot-plant experiments in Bangkok, Thailand. Polluted canal water was used as horizontal flow influent to two reactor channels filled with rocks. During one year operation, HRT, filter media, and aeration mode, were changed in several runs. The results showed that 1) the rock-bed filtration with aeration and the HRT more than 6 h can successfully improve polluted klong water by reducing the pollutants (e.g. 60-120mg/L of SS to 20-40 mg/L and 15-30 mg/L of BOD to 5-20 mg/L); 2) main removal mechanism seems to be the sedimentation resulting from the settleability enhanced by aeration, and the biofilm attached onto rocks also works in the reduction of soluble organic matter; 3) a combination of three rock sizes arranged in descending order showed best results; 4) longer HRT (13 h) produces better effluent but is not so effective if it exceeds 9 hours; 5) 60-70% of sediment IL was decomposed in a year, and porosity in rock beds reduced approximately 16%.

scholarly journals Dodecyl Mercaptan Functionalized Copper Mesh for Water Repellence and Oil-water Separation

2021 ◽  
Vol 18 (4) ◽  
pp. 887-899
Author(s):  
Yanling Tian ◽  
Jiekai Feng ◽  
Zexin Cai ◽  
Jiaqi Chao ◽  
Dawei Zhang ◽  
...  
Keyword(s):  
Separation Efficiency ◽  
Synthesis Process ◽  
Water Separation ◽  
Oil Water Separation ◽  
One Step ◽  
Oil Water ◽  
Water Repellence ◽  
Copper Mesh ◽  
Dodecyl Mercaptan

AbstractReckless discharge of industrial wastewater and domestic sewage as well as frequent leakage of crude oil have caused serious environmental problems and posed severe threat to human survival. Various nature inspired superhy-drophobic surfaces have been successfully applied in oily water remediation. However, further improvements are still urgently needed for practical application in terms of facile synthesis process and long-term durability towards harsh environment. Herein, we propose a simple one-step dodecyl mercaptan functionalization method to fabricate Super-hydrophobic-Superoleophilic Copper Mesh (SSCM). The prepared SSCM possesses excellent water repellence and oil affinity, enabling it to successfully separate various oil-water mixtures with high separation efficiency (e.g., > 99% for hexadecane-water mixture). The SSCM retains high separating ability when hot water and strong corrosive aqueous solutions are used to simulate oil-water mixtures, indicating remarkable chemical durability of the dodecyl mercaptan functionalized copper mesh. Additionally, the efficiency can be well maintained during 50 cycles of separation, and the water repellence is even stable after storage in air for 120 days, demonstrating the reusability and long-term stability of the SSCM. Furthermore, the functionalized mesh also shows good mechanical robustness towards abrasion by sandpaper, and oil-water separation efficiency of > 96% can be obtained after 10 cycles of abrasion. The reported one-step dodecyl mercaptan functionalization could be a simple method for increasing the water repellence of copper mesh, and thereby be a great candidate for treating large-scale oily wastewater in harsh environments.

Cost-Efficient De-Bottlenecking of Produced Water Treatment Systems through the Application of a Single Technology, Eliminating the Need for Hydrocyclones and Degassing Drums

2021 ◽  
Author(s):  
Steinar Asdahl ◽  
Johann Jansen van Rensburg ◽  
Martin Einarson Waag ◽  
Rune Glenna Nilssen
Keyword(s):  
Water Treatment ◽  
Produced Water ◽  
Separation Efficiency ◽  
Water System ◽  
Treatment Technology ◽  
Two Stage ◽  
Water Separation ◽  
Design Capacity ◽  
New Process ◽  
Produced Water Treatment

Abstract Traditionally, produced water from production separators is handled by multiple steps and different technologies in order to meet the required quality for either discharge or reinjection of the water. The development of the latest Compact Flotation Unit (CFU) technology has unlocked the potential for savings on cost, complexity, footprint and weight for the produced water treatment system. The developed CFU technology has proven applicable through field testing as a single treatment technology for reducing Oil-in-Water (OiW) content directly from tie-in at separator and still meet stringent requirements for outlet OiW quality. Field tests were conducted with inlet OiW concentration ranging from 200-2000 ppm, achieving results in the range 2.5 to 21 ppm only with a two-stage latest generation CFU. Compared to a traditional produced water system setup consisting of de-oiling hydrocyclones and a horizontal degassing vessel, the savings in footprint and operational weight is estimated to 54 % and 53 % respectively utilizing a two-stage CFU for a system with a design capacity of 76.000 BWPD. Furthermore, the development of the latest generation CFU technology has enabled the retrofit concept, incorporating the developed CFU internals into existing gravity separation based produced water vessels, converting them to more efficient flotation vessels with increased capacity. For brownfield and debottlenecking applications, operators are challenged by increasing water cut from maturing wells, and as a result exceeding the facilities design capacity for produced water treatment. This challenge is often further reinforced by increasingly stricter environmental legislation for OiW content for discharge or re-injection. The retrofit concept will offer a highly cost-, footprint- and weight-efficient solutions to these challenges utilizing existing vessels. Benefits of the retrofit concept: Bring proven and unique performance of the technology to other produced water separation vessels helping the operators improve the separation efficiency and increase throughput while meeting discharge requirementsShort execution time compared to installation of new process equipmentLow cost compared to installation of new process equipmentUtilization of existing equipment saves valuable footprint.

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