Investigations of the effect of pore size of ceramic membranes on the pilot-scale removal of oil from oil-water emulsion

Almojjly, Abdullah; Johnson, Daniel J.; Hilal, Nidal

doi:10.1016/j.jwpe.2019.100868

Cited by 29 publications

(10 citation statements)

References 43 publications

(61 reference statements)

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“…When the oil concentration in the oilwater emulsion is less or equal to 50 mg l −1 , it can be treated with a sand filter for satisfactory drinking water requirements. [188] The tubular configuration is the most frequently used membrane for the treatment of waste oil-in-water emulsion. A cellulose filter paper modified with PVA (cellulose-PVA) membrane is produced recently and applied for such separation.…”

Section: Economics Of Membrane Separation Of Oil In Water Emulsionsmentioning

confidence: 99%

Recent Aspects in Membrane Separation for Oil/Water Emulsion

Shalaby

Sołowski

Abbas

2021

Adv Materials Inter

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found with other insoluble matter, presenting relevant problems with safe and convenient separation. The legal discharge of oil-water emulsions is a complex process. [4] Thus, environmental authorities have established stringent regulations to cope with it. [5] Depending on countries, the oil limits are concentrations below 40 ppm as in Vietnam, [6] and in other countries like Korea, the maximum is only five ppm of oil in discharge. [7] Generally, the oil phase in water has three forms, based on oil droplets, size of more than 150 micrometers is called free oil, but that size found from 50 to 150 micrometers is the dispersed oil, [8] finally, the emulsified oil less than 20 µm. There is an increasing interest in employing membrane technology for filtering smaller size oil droplets. In this review, oil-water emulsion problems are highlighted with oil-water separation techniques selection and their performance with varied oil concentration and composition of other immiscible or miscible components. [9] Membrane technology is known formerly to economically advantageous for oily wastewater (OWW) treatment compared with other conventional technologies. [9] Based on the literature, the membranebased treatment cost estimation was about 1 and 3 $ m −3 , [10] lower than for dissolved air floatation (DAF) treatment (cost was 3.65 $ m −3 ). Generally, the treatment cost depends on OWW sources, as each industry has its specific blends for oil and grease jointly with other membrane foulants. [11] For example, oil-water emulsions treatment from the fatty acid industry has a total capital cost (costs of membranes, electricity, labor, cleaning, and maintenance) of 2.65 $ m −3 , compared with the railroad industry (it was ranged from 1.03 to 1.48 $ m −3 ). These costs for the metalworking OWW using UF were 2.8 $ m −3 . In microfiltration (MF) membrane, the OWW membrane-based treatment for oil concentration of 50 ppm annual cost was estimated as 0.098 $ m −3 with a feed rate of 100 m 3 day −1 . [9] The cost of membrane-based treatment of OWW is generally varying but is lower than conventional technologies. [12] 1.1. Oil-Water Emulsions Sources, Environmental Hazard, and Discharge Limits An oil-water emulsion is either a waste stream product, or secondary product. These effluents are generated from different areas and industrial sectors like the petroleum& gas sector, food processing, shipping facilities and maritime, and many others Oily wastewater is generated by various industries in extraordinary growing volumes, such as oil refineries, petrochemicals, metallurgical, food & beverages, and dairy industries, which need oil removal for safe discharge to the environment. Lower cost of production with high oil removal and efficient performance compared to classical methods for treating oil-water emulsions attributed to the alleviation of operation. That emphasizes membrane modification to enhance wettability, hydrophilicity with the antifouling property such as membranes dealing with tiny oil emulsions to be the key parameters to im...

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Section: Economics Of Membrane Separation Of Oil In Water Emulsionsmentioning

confidence: 99%

Recent Aspects in Membrane Separation for Oil/Water Emulsion

Shalaby

Sołowski

Abbas

2021

Adv Materials Inter

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“…Almojjly, Johnson, and Hilal (2019) revealed that hybrid coagulation/sand filtration and ceramic microfiltration were the optimal condition for oil–water emulsion treatment. Based on a pilot study, the oil–water emulsion interacted with the surface of the ceramic membrane surface size, which indicated that the optimal pore size was depended on the concentration of oil in the emulsion and droplet size.…”

Section: Physical Processesmentioning

confidence: 99%

“…Almojjly, Johnson, and Hilal (2019) studied the impact of ceramic membrane pore size for the removal of oil–water emulsion, which was a major pollutant in wastewater industries. They used a hybrid coagulation/sand filter with microfiltration (MF) pretreatment process to investigate the pore size effect and oil removal efficiency.…”

Section: Chemical Processesmentioning

confidence: 99%

Physico‐chemical processes

Yu¹,

Yao²,

Pan³

et al. 2020

Water Environment Research

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By summarizing 187 relevant research articles published in 2019, the review is focused on the research progress of physicochemical processes for wastewater treatment. This review divides into two sections, physical processes and chemical processes. The physical processes section includes three subsections , that is, adsorption, granular filtration, and dissolved air flotation, whereas the chemical processes section has five subsections , that is, coagulation/flocculation, advanced oxidation processes, electrochemical, capacitive deionization, and ion exchange.

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“…Currently, there are different technologies and methods for treating water polluted with oil, which takes into account the physical, physical–chemical, chemical, and biological principles that occur in the processes [ 4 , 6 ]. Among these methods are flotation [ 7 , 8 , 9 ], coagulation [ 6 , 10 , 11 , 12 , 13 ], the use of hydrocyclones [ 14 , 15 , 16 , 17 ], biological treatment [ 18 , 19 , 20 , 21 ] and membrane separation technologies [ 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

“…Membrane separation processes can be classified into four categories according to the pore size: microfiltration, ultrafiltration, nanofiltration, and reverse osmosis [ 24 , 25 , 26 ]. The pore size of the membrane determines the filtration properties of water/oil emulsions, which can also vary, depending on the concentration of the oil in the emulsion and, consequently, on the size of the oil drop [ 13 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic and Performance Evaluation of a Porous Ceramic Membrane Module Used on the Water–Oil Separation Process: An Investigation by CFD

et al. 2021

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Wastewater from the oil industry can be considered a dangerous contaminant for the environment and needs to be treated before disposal or re-use. Currently, membrane separation is one of the most used technologies for the treatment of produced water. Therefore, the present work aims to study the process of separating oily water in a module equipped with a ceramic membrane, based on the Eulerian–Eulerian approach and the Shear-Stress Transport (SST k-ω) turbulence model, using the Ansys Fluent® 15.0. The hydrodynamic behavior of the water/oil mixture in the filtration module was evaluated under different conditions of the mass flow rate of the fluid mixture and oil concentration at the entrance, the diameter of the oil particles, and membrane permeability and porosity. It was found that an increase in the feed mass flow rate from 0.5 to 1.5 kg/s significantly influenced transmembrane pressure, that varied from 33.00 to 221.32 kPa. Besides, it was observed that the particle diameter and porosity of the membranes did not influence the performance of the filtration module; it was also verified that increasing the permeability of the membranes, from 3 × 10−15 to 3 × 10−13 m2, caused transmembrane pressure reduction of 22.77%. The greater the average oil concentration at the permeate (from 0.021 to 0.037 kg/m3) and concentrate (from 1.00 to 1.154 kg/m3) outlets, the higher the average flow rate of oil at the permeate outlets. These results showed that the filter separator has good potential for water/oil separation.

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Investigations of the effect of pore size of ceramic membranes on the pilot-scale removal of oil from oil-water emulsion

Cited by 29 publications

References 43 publications

Recent Aspects in Membrane Separation for Oil/Water Emulsion

Recent Aspects in Membrane Separation for Oil/Water Emulsion

Physico‐chemical processes

Hydrodynamic and Performance Evaluation of a Porous Ceramic Membrane Module Used on the Water–Oil Separation Process: An Investigation by CFD

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