Effect of ultrasonic pretreatment on the oil removal of ASP flooding produced water

The objective of this study was to investigate the effect of polymer (GLP-100) and surfactant (MFOMAX) towards the efficiency of oil removal in a flotation column by using the Response Surface Methodology (RSM). Various concentrations of surfactant (250, 372 and 500 ppm) and polymer (450, 670, and 900 ppm) produced water were prepared. Dulang crude oil was used in the experiments. Flotation operating parameters such as gas flow rate (1–3 L/min) and duration of flotation (2–10 min) were also investigated. The efficiency of oil removal was calculated based on the difference between the initial concentration of oil and the final concentration of oil after the flotation process. From the ANOVA analysis, it was found that the gas flow rate, surfactant concentration, and polymer concentration contributed significantly to the efficiency of oil removal. Extra experiments were conducted to verify the developed equation at a randomly selected point using 450 ppm of polymer concentration, 250 ppm of surfactant concentration, 3 L/min gas flowrate and duration of 10 min. From these extra experiments, a low standard deviation of 1.96 was discovered. From this value, it indicates that the equation can be used to predict the efficiency of oil removal in the presence of surfactant and polymer (SP) by using a laboratory flotation column.

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Treatment of Synthetic Produced Water using Hybrid Membrane Processes

Journal of Applied Membrane Science & Technology ◽

10.11113/amst.v22n2.145 ◽

2018 ◽

Vol 22 (2) ◽

Author(s):

N. Chin ◽

S. O. Lai ◽

K. C. Chong ◽

S. S. Lee ◽

C. H. Koo ◽

...

Keyword(s):

Tio2 Nanoparticles ◽

Produced Water ◽

Removal Rate ◽

Pure Water ◽

Water Flux ◽

Transmembrane Pressure ◽

Oil Removal ◽

Permeate Flux ◽

Uf Membranes ◽

Pes Membrane

The study was concerned with the treatment of tank dewatering produced water using hybrid microfiltration (MF) and ultrafiltration (UF) processes. The pre-treatment MF membrane was fabricated with polyethersulfone (PES), n-methyl-2-pyrrolidone (NMP) and polyvinylpyrrolidone (PVP). The UF membranes meanwhile contained additional component, i.e., titanium dioxide (TiO2) nanoparticles in the range of zero to 1.0 wt.%. The membrane performances were analysed with respect to permeate flux, oil removal and flux recovery ratio. An increase in TiO2 nanoparticles enhanced the pore formation, porosity and pure water permeability due to improved hydrophilicity. The permeate flux of UF membranes increased with the increase of TiO2 nanoparticles and pressure. The oil removal rate by MF process was only 52.35%, whereas the oil rejection efficiency was between 82.34% and 95.71% for UF process. It should be highlighted that the overall oil removal rate could achieve as high as 97.96%. Based on the results, the PES membrane incorporated with 1.0 wt.% TiO2 was proved to be the most promising membrane at a transmembrane pressure of 3 bar. Although 1.0 M NaOH solution could be used as cleaning agent to recover membrane water flux, it is not capable of achieving good results as only 52.18% recovery rate was obtained.

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Oil Removal from Oilfield Produced Water, North Rumaila by Combination CoagulationFlocculation and Microfiltration Technique

Engineering and Technology Journal ◽

10.30684/etj.37.2c.1 ◽

2019 ◽

Vol 37 (2C) ◽

pp. 204-208

Author(s):

Thamer Mohammed ◽

Eman Awad ◽

Thabit Ahmed

Keyword(s):

Produced Water ◽

Oil Removal ◽

Oilfield Produced Water

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Asymmetric membranes for destabilization of oil droplets in produced water from alkaline-surfactant-polymer (ASP) flooding

10.1063/1.5034535 ◽

2018 ◽

Cited By ~ 1

Author(s):

Azierah Ramlee ◽

Chel-Ken Chiam ◽

Rosalam Sarbatly

Keyword(s):

Produced Water ◽

Oil Droplets ◽

Asymmetric Membranes ◽

Asp Flooding ◽

Alkaline Surfactant Polymer

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Oil removal of oilfield-produced water by induced air flotation using nonionic surfactants

Desalination and Water Treatment ◽

10.1080/19443994.2014.958103 ◽

2014 ◽

Vol 56 (7) ◽

pp. 1802-1808 ◽

Cited By ~ 7

Author(s):

Syllos Santos da Silva ◽

Osvaldo Chiavone-Filho ◽

Eduardo Lins de Barros Neto ◽

Edson Luiz Foletto

Keyword(s):

Nonionic Surfactants ◽

Produced Water ◽

Oil Removal ◽

Oilfield Produced Water ◽

Air Flotation

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Study on Demulsification-Flocculation Mechanism of Oil-Water Emulsion in Produced Water from Alkali/Surfactant/Polymer Flooding

Polymers ◽

10.3390/polym11030395 ◽

2019 ◽

Vol 11 (3) ◽

pp. 395 ◽

Cited By ~ 9

Author(s):

Bin Huang ◽

Xiaohui Li ◽

Wei Zhang ◽

Cheng Fu ◽

Ying Wang ◽

...

Keyword(s):

Interfacial Tension ◽

Produced Water ◽

Negative Charge ◽

Oil Droplets ◽

Water Separation ◽

Water Emulsion ◽

Flocculation Mechanism ◽

Asp Flooding ◽

Oil Water Separation ◽

Oil Water

The issue of pipeline scaling and oil-water separation caused by treating produced water in Alkali/Surfactant/Polymer (ASP) flooding greatly limits the wide use of ASP flooding technology. Therefore, this study of the demulsification-flocculation mechanism of oil-water emulsion in ASP flooding produced water is of great importance for ASP produced water treatment and its application. In this paper, the demulsification-flocculation mechanism of produced water is studied by simulating the changes in oil-water interfacial tension, Zeta potential and the size of oil droplets of produced water with an added demulsifier or flocculent by laboratory experiments. The results show that the demulsifier molecules can be adsorbed onto the oil droplets and replace the surfactant absorbed on the surface of oil droplets, reducing interfacial tension and weakening interfacial film strength, resulting in decreased stability of the oil droplets. The demulsifier can also neutralize the negative charge on the surface of oil droplets and reduce the electrostatic repulsion between them which will be beneficial for the accumulation of oil droplets. The flocculent after demulsification of oil droplets by charge neutralization, adsorption bridging, and sweeping all functions together. Thus, the oil droplets form aggregates and the synthetic action by the demulsifier and the flocculent causes the oil drop film to break up and oil droplet coalescence occurs to separate oil water.

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