Computer Simulation of Chemical Coagulation and Sedimentation of Suspended Solids

Wardzyńska, R.; Smoczyński, L.; Załęska-Chróst, B.

doi:10.1515/eces-2018-0008

Cited by 2 publications

(2 citation statements)

References 21 publications

(18 reference statements)

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“…[18] El proceso de sedimentación química, tiene como principio fundamental la remoción de los sólidos presentes en el agua de formación, mediante la acción química de agentes coagulante y floculante dosificados idóneamente en el proceso, con el fin de acelerar la precipitación gravitacional de los sólidos presentes. [19] La diferencia de densidades entre las partículas sólidas suspendidas y el líquido, hace que las partículas sólidas sedimenten siempre y cuando se domine la fuerza de rozamiento dependiente de la viscosidad del líquido. Los sólidos sedimentados se depositan en el fondo, de donde son eliminados en forma de residuos sólidos llamados lodos.…”

Section: Procesos Físicos Y Químicos Para El Tratamiento De Agua De F...unclassified

The Effect of Removal of Oil and Suspended Solids in the Production Water by Gravimetric Separation and Chemical Treatment Using Adequate Dosage of Coagulating and Flocculating Agents

Monteiro

Rivera

Vinueza

et al. 2022

espoch

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The aim of this study was to determine the removal effect of oil and suspended solids present in the production water from the oil and gas industry. Two treatment processes were proposed – oil skimming and chemical sedimentation. In both cases, experimental tests were developed to characterize each process. In the oil skimming process, a time of 0.22 hrs was obtained experimentally for the separation of oily-aqueous phases. The average size of the oil droplet in the formation water was 300 microns, obtained by Gaussian distribution. The chemical sedimentation process was designed by dosing coagulant and flocculant, selected through experimental jar tests. The selected chemicals were tannic resin as coagulant and a latex emulsion as flocculant in concentrations of 4 mg/L and 6 mg/L, respectively. The sizing of the settling equipment was carried out based on the solid settlement curve. The designed processes removed 96% of residual oils and 98% of the suspended solids present in the formation water, generating an effluent suitable for the secondary recovery of oil. Keywords: Production water, Oil skimming, Floculation, Coagulation, Chemical precipitation. Resumen En este trabajo de investigación se exploró el efecto de la remoción de aceites y solidos presentes en el agua de formación proveniente de la extracción de hidrocarburos de un campo petrolero de la cuenca Oriente ecuatoriana. En cuestión a procesos de tratamiento, se plantearon dos procesos unitarios, el desnatado de petróleo y la sedimentación química. En ambos casos, se ejecutaron campañas experimentales para la caracterización de las variables y resultados de cada proceso. En el proceso de desnatado, se alcanzó experimentalmente, mediante separación gravimétrica, un tiempo de 0.22 horas para la efectiva división de las fases oleosa y acuosa. Por otro lado, el tamaño promedio de la gota de aceite en el agua de formación fue 300 micrones, esté tamaño promedio se consiguió mediante microscopía óptica y posteriormente cálculos estadísticos mediante distribución Gaussiana. El proceso unitario de sedimentación química fue diseñado mediante la dosificación de compuestos químicos coagulante y floculante; los seleccionados mediante ensayos experimentales conocidos como prueba de jarras fueron una resina tánica como coagulante y una emulsión de látex como floculante, en concentraciones idóneas de 4 mg/L y 6 mg/L respectivamente. El dimensionamiento del equipo sedimentador se realizó con base en la curva de asentamiento de sólidos. Esta investigación concluyó en que los procesos diseñados alcanzan una remoción de aproximadamente el 96% de petróleo residual (aceites) y de cerca del 98% de los sólidos suspendidos presentes en el agua de formación. Estos valores de remoción permiten generar un efluente de reutilización del agua de formación. Palabras Clave: Agua de formación, Desnatado, Floculación, Coagulación, Sedimentación química.

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Section: Procesos Físicos Y Químicos Para El Tratamiento De Agua De F...unclassified

The Effect of Removal of Oil and Suspended Solids in the Production Water by Gravimetric Separation and Chemical Treatment Using Adequate Dosage of Coagulating and Flocculating Agents

Monteiro

Rivera

Vinueza

et al. 2022

espoch

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“…6. The concentration number of colloidal aggregates [49] (N 1 , N 2 , N 3 , and ƩNi) formed per cubic meter [22] was evaluated by substituting the values of C 0 = 520 mg/L and k t = 3.2 × 10 −3 L/mg.min obtained from the predicted rate constant of the RF algorithm into Eqs. 12, 13, 14, 15, 16.…”

Section: Colloidal Particle Aggregation Kinetics and Distribution Ana...mentioning

confidence: 99%

Machine learning model for the optimization and kinetics of petroleum industry effluent treatment using aluminum sulfate

Ugonabo

Ovuoraye

Chowdhury³

et al. 2022

J. Eng. Appl. Sci.

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Small-scale preliminary studies are necessary to determine the feasibility of the machine learning (ML) algorithm and time-evolution kinetics to meet the design specification of the treatment unit. The train and test datasets were obtained from jar test experimentation on the petroleum industry effluent (PIE) sample using aluminum sulfate (AS) as the coagulant. The ML algorithm from scikit-learn was employed to determine the optimum operating condition for the removal of colloidal particles, causing turbidity in the PIE. The predictive capacity of four ML models was compared based on their statistical metrics for clean discharge. The predicted optimum condition corresponds to pH (10), dosage (0.1 g/L), and settling time (30 min) which transcends to residual turbidity ≤ 10 NTU and translates to 95% removal efficiency. The second-order AS-sweep flocculation kinetic showed that at the predicted optimum conditions, modeled rate constant of 1.33 × 10−3 L/g.min and flocculation period of 1.2 min reduced the combination of the monomer, dimmer, and trimmer class colloids from an initial 570 mg/L concentration to the residual counts of 24 mg/L corresponding to residual turbidity ≤ 10 NTU under the mixing regime 14 s−1 ≤ G ≤ 164 s−1 satisfied the EPA standard for clean effluent discharge. It incorporated the selected ML output with time-evolution and aggregation kinetics to define sedimentation tank geometry for cleaner discharge. The findings from the design-driven optimization recommended a flow rate (1000 m3s−1), coefficient of kinematic viscosity (0.841 mm/s), and the required detention time (30–60 min) to define the sedimentation tank geometry.

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Computer Simulation of Chemical Coagulation and Sedimentation of Suspended Solids

Cited by 2 publications

References 21 publications

The Effect of Removal of Oil and Suspended Solids in the Production Water by Gravimetric Separation and Chemical Treatment Using Adequate Dosage of Coagulating and Flocculating Agents

The Effect of Removal of Oil and Suspended Solids in the Production Water by Gravimetric Separation and Chemical Treatment Using Adequate Dosage of Coagulating and Flocculating Agents

Machine learning model for the optimization and kinetics of petroleum industry effluent treatment using aluminum sulfate

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