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Title:
MIKROFILTRACIJA MODELNIH OLJNO VODNIH EMULZIJ
Authors:
ID
Novak, Liljana
(Author)
ID
Simonič, Marjana
(Mentor)
More about this mentor...
Files:
VS_Novak_Liljana_2013.pdf
(2,32 MB)
MD5: 7A8F1657D03B203468D47F143B2F1A0C
Language:
Slovenian
Work type:
Bachelor thesis/paper
Typology:
2.11 - Undergraduate Thesis
Organization:
FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:
Cilj diplomskega dela je bil raziskati učinkovitost membrane s steklenimi vlakni in polisulfonske membrane pri procesu odstranjevanja olj z mikrofiltracijo iz oljno vodnih emulzij kovinsko-predelovalne industrije. Z različno kombinacijo obratovalnih pogojev, predvsem pH vrednosti (pH = 5, 7 in 9), koncentracije olj (0,5, 1,5 in 3 %) in dodatka soli (0,1 in 5 g) CaCl2 smo želeli doseči čim večjo gostoto volumskega toka. Kot predčiščenje smo uporabili elektrokoagulacijo. Rezultati kažejo, da je pri filtriranju skozi membrano s steklenimi vlakni veliko višja gostota volumskega toka, če jo primerjamo s polisulfonsko membrano. Najvišjo gostoto volumskega toka smo dosegli pri najnižji koncentraciji olja (φ = 0,5 %), pH = 9 in sobni temperaturi (t = ~20±3 ˚C). Prevladujoči mehanizem mašenja membrane s steklenimi vlakni je bil nastanek filtrnega kolača na površini membrane, posledično pa se zniža gostota volumskega toka permeata. Opravili smo fizikalno-kemijske analize modelne oljno vodne emulzije in permeata. Ugotovili smo, da se motnost in vrednost kemijske potrebe po kisiku znižata po mikrofiltraciji. Elektrokoagulacija ne zniža mašenja membran.
Keywords:
mikrofiltracija
,
olja
,
emulzija
,
mašitev
,
stekleni filter
Place of publishing:
Maribor
Publisher:
[L. Novak]
Year of publishing:
2013
PID:
20.500.12556/DKUM-40741
UDC:
544.773.32:66.081.6(043.2)
COBISS.SI-ID:
17477142
NUK URN:
URN:SI:UM:DK:NP6NRUL4
Publication date in DKUM:
19.06.2013
Views:
1736
Downloads:
211
Metadata:
Categories:
KTFMB - FKKT
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:
NOVAK, Liljana, 2013,
MIKROFILTRACIJA MODELNIH OLJNO VODNIH EMULZIJ
[online]. Bachelor’s thesis. Maribor : L. Novak. [Accessed 16 March 2025]. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=40741
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Secondary language
Language:
English
Title:
MICROFILTRATION OF MODEL OIL-IN-WATER EMULSION
Abstract:
The aim of this thesis was to explore the efficiency of glass microfibre membrane and polysulphide membrane for microfiltration in the process of removing oil from oil-in-water emulsions in metal-processing industry. The aim was to achieve the maximum flux with combinations of operating conditions, such as pH values (pH at 5, 7 and 9), oil concentration (0,5, 1,5 and 3 %) and salt addition (0,1 and 5 g) CaCl2. Electrocoagulation was used as a pretreatment method. The results show that at the filtration, the glass microfibre filters proved to be more efficient because the polysulfide membrane enabled much lower fluxes. The highest density of the volume flow was achieved at the lowest concentration of oil, φ = 0,5 %, alkaline pH (pH = 9) and room temperature (t = ~20±3 ˚C). The dominant mechanism of membrane fouling with glass microfibre filters was cake formation on the surface of the membrane during microfiltration, and consequently decreased the flux. We performed phisico-chemical analyses of the model oil-in-water emulsions and permeate. The turbidity and value of chemical oxygen demand decreased during microfiltration. Electrocoagulation is inefficient as a pretreatment method.
Keywords:
microfiltration
,
oils
,
emulsion
,
fouling
,
glass membrane
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