Hydrophylicity Enhancement of Modified Cellulose Acetate Membrane to Improve the Membrane Performance in Produced Water Treatment

Tutuk Djoko Kusworo,Tyas Dwi Payanti,Dani Puji Utomo,Danny Soetrisnanto,Cynthia Santoso,A.C Kumoro,L Yung,P.T.S Nam,M.A Hussain,W.R.W Daud,X Rong,Hadiyanto Hadiyanto,M.T Phong,S.A Roces,A.W Lothongkum

doi:10.1051/matecconf/201815608003

Abstract

Produced water is a wastewater generated from petroleum industry with high concentration of pollutants such as Total Dissolved Solid, Organic content, and Oil and grease. Membrane technology has been currently applied for produced water treatment due to its efficiency, compact, mild and clean process. The main problem of produced water using membrane is fouling on the membrane surface which causes on low permeate productivity. This paper is majority focused on the improvement of anti-fouling performance through several modifications to increase CA membrane hydrophilicity. The membrane was prepared by formulating the dope solution consists of 18 wt-% CA polymer, acetone, and PEG additive (3 wt-%, 5 wt-%, and 7 wt-%). The membranes are casted using NIPS method and being irradiated under UV light exposure. The SEM images show that parepared membrane has asymmetric structure consist of dense layer, intermediete layer, and finger-like support layer. The filtration test shows that PEG addition increase the membrane hydrophilicity and the permeate flux increases. UV light exposure on the membrane improves the membrane stability and hydrophilicity. The imrpovement of membrane anti-fouling performance is essential to achieve the higher productivity without lowering its pollutants rejection.

Highlights

Produced water is a by-product of the petroleum industry, where during production every barrel of obtained oil produces 3 barrels of produced water and will increase with the age of the oil well [1]
The materials used in this research include: produced water from Pertamina Oil and Gas Company, Cirebon, cellulose acetate (CA) from MKR Chemicals, poly ethylene glycol additives (PEG) 1000 and PEG 4000 from Sigma-Aldrich Chemie GmbH Steinheim Germany, 99.75% Acetone from Mallinckrodt Chemicals, and distilled from UPT Diponegoro University Integrated Laboratory
3.1 The effect of PEG Molecular Weight on membrane performance The performance of cellulose acetate membranes can be known from the membrane flux profile

Summary

Introduction

Produced water is a by-product of the petroleum industry, where during production every barrel of obtained oil produces 3 barrels of produced water and will increase with the age of the oil well [1]. Produced water contains organic and inorganic materials such as Total Dissolved Solid (TDS) of 4380-49.987 mg/L, Magnesium 396.1-678 mg/L, Sulfate 6.2-621.3 mg/L, Calcium 987-2669 mg/L [2]. Membrane technology is widely used for manufactured water treatment. Membrane technology is a beneficial technology because of its high separation efficiency and the addition of a small chemical [4]. The design of membrane equipment is simple with low initial investment costs, low operational energy, and easy maintenance. The nanofiltration membrane is a type of membrane filtrations which effectively reduces the chemical content such as inorganic salts and small organic microsolutes present in produced water, and has a higher flux yield than the reverse osmosis membrane [5]. The nanofiltration membrane is a membrane having a pore size

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Conclusion