Membrane development for oil contaminated water treatments: Master's thesis

Jutta Tiitinen

Research output: ThesisMaster's thesisTheses

Abstract

The aim of this Master's thesis study was to develop a membrane for oil contaminated water treatments. Oily wastewaters are a big problem to environment and therefore it is important to find an efficient method for their treatment. There are several treatment methods, but one of the most promising methods is membrane filtration. In the theoretical part of this study the membrane technology and polymeric membrane preparation with phase inversion and membrane modification methods was discussed. It was also told about the most important properties of the membranes. Oily waters, their treatment methods and oily wastewater sources were discussed more specifically. In the experimental part membranes from cellulose acetate were prepared and membranes were modified with two different methods. Modification methods were surface modification and polymer mixing. The modification purpose was to make membranes more hydrophilic and increase surface charge, which can reduce fouling. Membranes were characterized by determining zeta potential, contact angle, oil retention, pure water permeability, pressure-normalized flux and fouling. It were used both synthetic and real spent oil-water emulsion in membrane filtration. Surface modification resulted membranes, which had better properties than unmodified membrane. The amount of substance used in surface modification affected a lot to membrane properties, so it would be necessary to try different amounts of substance to develop the best membrane for oil-water emulsion treatment.
Original languageEnglish
QualificationMaster Degree
Awarding Institution
  • Lappeenranta University of Technology
Supervisors/Advisors
  • Pihlajamäki, Arto, Supervisor, External person
Place of PublicationEspoo
Publisher
Print ISBNs978-951-38-8167-2
Electronic ISBNs978-951-38-8168-9
Publication statusPublished - 2014
MoE publication typeG2 Master's thesis, polytechnic Master's thesis

Fingerprint

Water treatment
Oils
Membranes
Surface treatment
Fouling
Emulsions
Water
Wastewater
Polymeric membranes
Membrane technology
Zeta potential
Surface charge
Contact angle
Polymers
Fluxes

Keywords

  • ultrafiltration
  • membrane modification
  • cellulose acetate
  • fouling
  • oilwater emulsion

Cite this

Tiitinen, J. (2014). Membrane development for oil contaminated water treatments: Master's thesis. Espoo: VTT Technical Research Centre of Finland.
Tiitinen, Jutta. / Membrane development for oil contaminated water treatments : Master's thesis. Espoo : VTT Technical Research Centre of Finland, 2014. 72 p.
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author = "Jutta Tiitinen",
year = "2014",
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Tiitinen, J 2014, 'Membrane development for oil contaminated water treatments: Master's thesis', Master Degree, Lappeenranta University of Technology , Espoo.

Membrane development for oil contaminated water treatments : Master's thesis. / Tiitinen, Jutta.

Espoo : VTT Technical Research Centre of Finland, 2014. 72 p.

Research output: ThesisMaster's thesisTheses

TY - THES

T1 - Membrane development for oil contaminated water treatments

T2 - Master's thesis

AU - Tiitinen, Jutta

PY - 2014

Y1 - 2014

N2 - The aim of this Master's thesis study was to develop a membrane for oil contaminated water treatments. Oily wastewaters are a big problem to environment and therefore it is important to find an efficient method for their treatment. There are several treatment methods, but one of the most promising methods is membrane filtration. In the theoretical part of this study the membrane technology and polymeric membrane preparation with phase inversion and membrane modification methods was discussed. It was also told about the most important properties of the membranes. Oily waters, their treatment methods and oily wastewater sources were discussed more specifically. In the experimental part membranes from cellulose acetate were prepared and membranes were modified with two different methods. Modification methods were surface modification and polymer mixing. The modification purpose was to make membranes more hydrophilic and increase surface charge, which can reduce fouling. Membranes were characterized by determining zeta potential, contact angle, oil retention, pure water permeability, pressure-normalized flux and fouling. It were used both synthetic and real spent oil-water emulsion in membrane filtration. Surface modification resulted membranes, which had better properties than unmodified membrane. The amount of substance used in surface modification affected a lot to membrane properties, so it would be necessary to try different amounts of substance to develop the best membrane for oil-water emulsion treatment.

AB - The aim of this Master's thesis study was to develop a membrane for oil contaminated water treatments. Oily wastewaters are a big problem to environment and therefore it is important to find an efficient method for their treatment. There are several treatment methods, but one of the most promising methods is membrane filtration. In the theoretical part of this study the membrane technology and polymeric membrane preparation with phase inversion and membrane modification methods was discussed. It was also told about the most important properties of the membranes. Oily waters, their treatment methods and oily wastewater sources were discussed more specifically. In the experimental part membranes from cellulose acetate were prepared and membranes were modified with two different methods. Modification methods were surface modification and polymer mixing. The modification purpose was to make membranes more hydrophilic and increase surface charge, which can reduce fouling. Membranes were characterized by determining zeta potential, contact angle, oil retention, pure water permeability, pressure-normalized flux and fouling. It were used both synthetic and real spent oil-water emulsion in membrane filtration. Surface modification resulted membranes, which had better properties than unmodified membrane. The amount of substance used in surface modification affected a lot to membrane properties, so it would be necessary to try different amounts of substance to develop the best membrane for oil-water emulsion treatment.

KW - ultrafiltration

KW - membrane modification

KW - cellulose acetate

KW - fouling

KW - oilwater emulsion

M3 - Master's thesis

SN - 978-951-38-8167-2

T3 - VTT Technology

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Tiitinen J. Membrane development for oil contaminated water treatments: Master's thesis. Espoo: VTT Technical Research Centre of Finland, 2014. 72 p.