Abstract
Abstract The present paper deals with the ultrafiltration (UF) of produced water using a polysulfone membrane. Membranes were prepared by the phase inversion technique using polysulfone (PSf) polymer base, poly vinyl pyrrolidone (PVP) additive and N-methyl-2-pyrrolidone (NMP) solvent. Prepared UF membranes were characterized by determining the surface morphology by scannaing electron microscopy (SEM), atomic force microscopy (AFM), porosity, (iii) water contact angle, equilibrium water content and pure water flux, whereas membrane performance was determined by measuring permeate flux and oil rejection using oily synthetic produced water. With the increase in trans-membrane pressure in the cell, the permeate flux increased significantly, but oil rejection showed a decreasing trend. The best UF membrane performance under different trans-membrane pressures was obtained by maintaining (90% oil rejection using an UF membrane with the following composition: PSf- 15%, PVP - 5% and NMP - 80%.
Highlights
A large volume of water is usually produced as a byproduct during oil and gas production, which is mixed with dispersed oil, grease, dissolved solids and suspended solids (Chakrabarty et al, 2010)
We reported the use of polysulfone based membrane for the separation of oil from oily produced water with varying oil concentration (< 400 mg.L-1) to meet the environmental requirements
The surface morphology of the membrane was analyzed by Field Emission Scanning Electron Microscopy (FE-scannaing electron microscopy (SEM)), Atomic Force Microscopy (AFM), pore size distribution, Porosity and pure water flux
Summary
A large volume of water (called produced water) is usually produced as a byproduct during oil and gas production, which is mixed with dispersed oil, grease, dissolved solids and suspended solids (Chakrabarty et al, 2010). The surface morphology of the membrane was analyzed by Field Emission Scanning Electron Microscopy (FE-SEM), Atomic Force Microscopy (AFM), pore size distribution, Porosity and pure water flux. The oil droplet size distribution of produced water was measured to evaluate the membrane performance.
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