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Title:NAČRTOVANJE EKSPERIMENTOV ULTRAFILTRACIJE RAZTOPINE HLADILNO-MAZALNEGA SREDSTVA
Authors:Petek, Monika (Author)
Simonič, Marjana (Mentor) More about this mentor... New window
Goršek, Andreja (Co-mentor)
Files:.pdf UNI_Petek_Monika_2012.pdf (1,50 MB)
 
Language:Slovenian
Work type:Undergraduate thesis (m5)
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Diplomsko delo povzema rezultate raziskave, ki je temeljila na optimizaciji procesa ultrafiltracije oljno-vodnih emulzij iz kovinsko-predelovalne industrije s polimerno membrano. Namen dela je bil proučiti medsebojni vpliv štirih različnih procesnih parametrov (tlaka, koncentracije olja v emulziji, pH in temperature) na treh različnih nivojih (nizkem, srednjem in visokem). Prav tako smo želeli določiti kombinacijo obratovalnih pogojev, pri katerih bi gostota volumskega toka bila čim večja. Poskuse smo načrtovali s Taguchijevo metodo, ki zmanjša število potrebnih eksperimentov, z analizo variance (ANOVA) pa smo ocenili delež vpliva posameznega procesnega parametra na gostoto volumskega toka. Namen raziskave je bil tudi določiti prevladujoči mehanizem mašenja polimerne membrane s študijo modelov po Hermi-ji. Na podlagi kemijskih analiz modelne raztopine in permeata, s katerimi smo določali kemijsko potrebo po kisiku (KPK) in koncentracijo olj, smo ovrednotili učinkovitost odstranjevanja omenjenih komponent. Najvišjo gostoto volumskega toka smo dosegli pri najvišjem obratovalnem tlaku, p = 4,5 bar, najnižji koncentraciji olja v modelni raztopini, φ = 0,5 % (v/v), alkalnem pH, pH = 9, in srednji temperaturi, T = 35 °C. Prevladujoči mehanizem mašenja membrane je bil filtrni kolač. Učinkovitost odstranjevanja KPK je bila najvišja pri najnižjem tlaku, koncentraciji 1,5 % (v/v), alkalnem pH in najvišji temperaturi, učinkovitost odstranjevanja olj pa prav tako pri najnižjem tlaku, vendar najvišji koncentraciji, neutralnem pH in srednji temperaturi.
Keywords:Ultrafiltracija, polimerna membrana, oljno-vodne emulzije, Taguchijeva metoda, modeli mašenja membran po Hermi-ji.
Year of publishing:2012
Publisher:[M. Petek]
Source:Maribor
UDC:542.816(043.2)
COBISS_ID:16689174 Link is opened in a new window
NUK URN:URN:SI:UM:DK:AB0DS3AT
Views:1688
Downloads:166
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Categories:KTFMB - FKKT
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Secondary language

Language:English
Title:ULTRAFILTRATION OF LUBRICANTS' SOLUTION USING EXPERIMENTAL DESIGN
Abstract:The thesis summarizes the results of the research, based on the optimization of ultrafiltration of oil-in-water emulsions from the metal-working industry with polymer membrane. The aim of this work was to study the interactions of four different process parameters (transmembrane pressure (TMP), feed oil concentration, pH and temperature) at three different levels (low, medium and high). We also wanted to define a combination of operating conditions in order to maximize the flux. Experiments were planned with Taguchi experimental design, which reduces the number of required experiments. Using the analysis of variance (ANOVA), we evaluated importance of each process parameter on flux. The purpose of this work was also to determine the dominant fouling mechanism of polymer membrane using Hermia models. We measured chemical oxygen demand (COD) and oil concentration in feed and permeate solutions. Based on the results of the analysis the retention of individual component was determined. The highest flux was observed at the highest operating pressure, p = 4,5 bar, the lowest feed concentration, φ = 0,5 % (v/v), highest pH, pH = 9, and medium temperature, T = 35 °C. The dominant fouling mechanism was the cake layer formation. The highest retention of COD was observed at the lowest pressure, concentration 1,5 % (v/v), alkaline pH and the highest temperature. On the other hand the highest retention of oil was also observed at the lowest pressure, but at the highest concentration, neutral pH and medium temperature.
Keywords:Ultrafiltration, polymer membrane, oil-in-water emulsions, Taguchi experimental design, membrane fouling Hermia models.


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