Batch and continuous of oil removal using organoclay and low-cost ceramic membrane

Ana Beatriz De França Silva Araújo,Tellys Lins Almeida Barbosa,Meiry Gláucia Freire Rodrigues,Rochelia Silva Souza Cunha,Francisco Alex De Sousa Silva,Edilânia Silva Do Carmo

doi:10.33448/rsd-v10i15.22542

Ana Beatriz De França Silva Araújo, Tellys Lins Almeida Barbosa + Show 4 more

Open Access

https://doi.org/10.33448/rsd-v10i15.22542

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Abstract

The objective of this work was to compare two oily effluent treatment systems, batch process and membrane separation process (PSM). In the batch process an organophilic clay was used and in the PSM a low cost ceramic membrane was used. A bofe clay was used as raw material for the preparation of organophilic clay prepared with surfactant, via direct method and characterized by X-ray diffraction. The sorption properties of this organoclay were evaluated to remove oil. The low-cost, disc-shaped ceramic membrane was obtained from natural bofe clay from Boa-Vista, Paraíba, Brazil. The uniaxial dry compaction method and sintering at 650 °C was used. The membrane was characterized by XRD and water permeability and its performance was evaluated by oil/water emulsion separation tests from a synthetic effluent, using a stainless steel module under the conditions of initial concentration of the emulsion 125 mg.L-1, temperature of 25 °C and pressure of 2.0 bar. It is concluded that the two processes (PSM and batch system using bofe organophilic clay as adsorbent) can be used and are promising for the treatment of oily water.

Highlights

Water emulsions are the main pollutants emitted into water by industry and domestic sewage and are the major pollution problem because oilfield produced water has distinctive characteristics due to organic and inorganic matter
The value obtained from the cation exchange capacity for bofe clay
In comparison with the results found in the literature, the ceramic membrane results produced in this work were satisfactory

Summary

Introduction

Water emulsions are the main pollutants emitted into water by industry and domestic sewage and are the major pollution problem because oilfield produced water has distinctive characteristics due to organic and inorganic matter. It includes salt and hydrocarbons, which may be toxic to the environment (Tummons et al, 2020; Alzahrani, & Mohammad, 2014; Ebrahimi et al, 2017). The gravity settling separation (Le et al, 2013) and mechanical coalescence methods (Hazlett, 1969; Sutherl, 2008) are the well-known traditional treatment processes, the efficiency of which depends on the size of the oil droplets in wastewater (Abuhasel et al, 2021)

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