Ultrafiltration membrane process for produced water treatment: experimental and modeling

Badrnezhad, Ramin; Beni, Ali Heydari

doi:10.2166/wrd.2013.092

Cited by 20 publications

(16 citation statements)

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“…The assumption that fouling is linearly proportional to the concentration still needs to be validated for an OiWM before any conclusion can be made with respect to the model accuracy. Even though models have been explicitly developed to describe fouling for CF filtration, and to incorporate concentration into the models, recent studies for PWT continuously insist to use the original models developed for dead-end filtration [37,136]. If the extended models could be validated for PW, it would improve the accuracy of the models across different concentration levels, and thereby reduce the need to re-estimate the model for different concentration levels.…”

Section: Structurementioning

confidence: 99%

Membrane Fouling for Produced Water Treatment: A Review Study From a Process Control Perspective

Jepsen

Bram

Pedersen

et al. 2018

Water

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The offshore oil and gas industry is experiencing increasing water cuts as the reservoirs mature. The increase in produced water stresses the currently deployed deoiling technologies, resulting in more oil in the discharged water. Deploying membrane filtration to reduce the hydrocarbon concentration inherits additional complications related to fouling of the membranes: A process where the accumulation of material within and on the membrane surface adds additional flow resistance. This paper reviews and analyses the fouling detection, removal, prevention, dynamical and static modeling, with emphasis on how the membrane process can be manipulated from a process control perspective. The majority of the models rely on static descriptions or are limited to a narrow range of operating conditions which limits the usability of the models. This paper concludes that although the membrane filtration has been successfully applied and matured in many other industrial areas, challenges regarding cost-effective mitigation of fouling in the offshore deoiling applications, still exist. Fouling-based modeling combined with online parameter identification could potentially expand the operating range of the models and facilitate advanced control design to address transient performance and scheduling of fouling removal methods, resulting in cost-effective operation of membrane filtration systems. With the benefits of membrane filtration, it is predicted that membrane technology will be incorporated in produced water treatment, if the zero-discharge policies are enforced globally.

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Section: Structurementioning

confidence: 99%

Membrane Fouling for Produced Water Treatment: A Review Study From a Process Control Perspective

Jepsen

Bram

Pedersen

et al. 2018

Water

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“…where In aerobic process, an uptake of oxygen is necessary for the survival of the biomass and products uniformity, thus the rate of oxygen transfer [10] can be evaluated using the mass transfer equation expressed as:…”

Section: Materials Balance On Mbrmentioning

confidence: 99%

“…The saturated oxygen concentration can be evaluated using equation: L K a can be evaluated for non-coalescing fluid [10] as:…”

Section: Height Of Mbrmentioning

confidence: 99%

Computer-Aided Design and Simulation of a Membrane Bioreactor for Produced Water Treatment

Dagde¹,

Nwidadaa²

2018

ACES

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Membrane Bio Reactor (MBR) has been designed and simulation for the treatment of Chemical Oxygen Demand (COD), Total Suspended Solids (TSS), Total Organic Carbon (TOC), Total Dissolved Solid (TDS) and Oil/ Grease in produced water at a capacity of 54.1778 kg/hr for removal of 95%-99% contaminants. The MBR design equations were developed using the law of conservation of mass to determine the dimensions and functional parameters. The developed performance equations were integrated numerically using fourth-order Runge-Kutta embedded in MATLAB computer program to determine the optimum range of values of the reactor functional dimensions and functional parameters. The effect of rate of energy supply per reactor volume and substrate specific rate constant on the capacity of the membrane bioreactor were investigated. Also, the effect of initial loading of substrate on Solid Retention Time (SRT) was also investigated. Results showed that kinetic parameters influenced the percentage removal of contaminants as Hydraulic Retention Time (HRT) and size of MBR decreased with increase in specific rate constant at fixed conversion of contaminants. Also, HRT and MBR size increased as the conversion of Chemical Oxygen Demand (COD) was increased, while increased in the ratio of energy supplied per volume resulted in decreased of MBR volume. The effect of initial loading of substrate on SRT showed that increased in substrate loading increased the retention time of the solid at fixed substrate conversion, while the conversion of substrate to microorganism increased as the solid retention time was increased. The increased in initial loading of substrate concentration increased the production of Mixed Liquor Suspended Solids (MLSS). Thus, the size of MBR required for the conversion of the investigated contaminants at the design percentage removal increased in the following order: oil/grease < TSS < TOC < TDS. The MBR volume, height and HRT were 1.10 and 5.

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“…These models were originally developed for frontal filtration at constant pressure [6][7][8][9]. However, it has been demonstrated that, under specific conditions, Hermia models could be applied in tangential filtration [10][11][12][13][14][15][16][17][18][19][20][21]. Hong et al [22] showed during tangential filtration of colloidal suspensions that the filtration process before the "pseudo stationary state" is similar to the frontal filtration.…”

Section: Introductionmentioning

confidence: 99%

Fouling mechanism and screening of backwash parameters: Seawater ultrafiltration case

Slimane

Ellouze

Amar

2018

Environmental Engineering Research

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This work deals with the membrane fouling mode and the unclogging in seawater ultrafiltration process. The identification of the fouling mechanism by modeling the experimental flux decline was performed using both the classical models of Hermia and the combined models of Bolton. The results show that Bolton models did not bring more precise information than the Hermia's and the flux decline can be described by one of the four Hermia's models since the backwash interval is ≤ 60 min. An experimental screening study has been then conducted to choose among 5 parameters (backwash interval, duration, pulses and the flow-rate or injected hypochlorite concentration) those that are the most influential on the fouling and the net water production. It has emerged that fouling is mainly affected by the backwash interval; its prolongation from 30 to 60 min engenders an increase in the reversible fouling and a decrease in the irreversible fouling. This later is also significantly reduced when the hypochlorite concentration increases from 4.5 to 10 ppm. Moreover, the net water production significantly increases with increasing the filtration duration up to 60 min and decreases with decreasing the backwash duration and backwash flow-rate from 10 to 40 s and from 15 to ≥ 20 L.min -1 , respectively.

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Ultrafiltration membrane process for produced water treatment: experimental and modeling

Cited by 20 publications

References 0 publications

Membrane Fouling for Produced Water Treatment: A Review Study From a Process Control Perspective

Membrane Fouling for Produced Water Treatment: A Review Study From a Process Control Perspective

Computer-Aided Design and Simulation of a Membrane Bioreactor for Produced Water Treatment

Fouling mechanism and screening of backwash parameters: Seawater ultrafiltration case

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