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Title:Optimizacija čiščenja realne industrijske odpadne vode : diplomsko delo
Authors:Vouk, Primož (Author)
Lobnik, Aleksandra (Mentor) More about this mentor... New window
Bauman, Maja (Co-mentor)
Files:.pdf UN_Vouk_Primoz_2018.pdf (3,31 MB)
MD5: A898325ACC278A7FDA8A7CFBEF838AC3
 
Language:Slovenian
Work type:Bachelor thesis/paper (mb11)
Typology:2.11 - Undergraduate Thesis
Organization:FS - Faculty of Mechanical Engineering
Abstract:Vse ostrejši zakonodajni predpisi zahtevajo primerno in učinkovito predobdelavo in čiščenje industrijske odpadne vode. V ta namen je bila izvedena optimizacija čiščenja realne industrijske odpadne vode iz kovinsko predelovalne industrije tako, da je voda po postopku čiščenja primerna za ponovno uporabo v industrijskem procesu in ali vsaj za izpust v javno kanalizacijo. Cilj raziskave je bil iz industrijske odpadne vode odstraniti ione težkih kovin (aluminijeve-Al3+, bakrove-Cu2+ in železove Fe3+ ione). V raziskavi smo vzorcem industrijske odpadne vode analizirali fizikalno-kemijske parametre (temperaturo, pH vrednost, električno prevodnost, neraztopljene snovi, usedljive snovi, motnost, kemijsko potrebo po kisiku-KPK, biokemijsko potrebo po kisiku-BPK5 in koncentracijo Al3+, Cu2+ in Fe3+ ionov). Na vzorcih odpadne vode smo najprej preverili vpliv variiranja pH vrednosti, učinkovitost postopka nanofiltracije in flokulacije, ter na podlagi primerjave rezultatov pred in po čiščenju definirali optimalni postopek čiščenja. Eksperimenti so pokazali, da s postopkom nanofiltracije pri delovnem tlaku 10 bar, tangencialnem pretoku 1,6 L/min in izbrano NF2 membrano ter s predčiščenjem (7-12 µm filter) in variiranjem pH vrednosti s 5M HCl učinkovito odstranimo do 97% ionov Al3+, Cu2+ in Fe3+. Kot učinkovita metoda za čiščenje industrijske odpadne vode se je izkazala tudi flokulacija s flokulacijskim sredstvom CWL40 pri 160 obr/min in s 5 min končnim usedanjem. S postopkom flokulacije smo ione Al3+, Cu2+ in Fe3+ odstranil med 90-98%. Na podlagi rezultatov znižanja vrednosti fizikalno-kemijskih parametrov pod MDK za izpust v kanalizacijo, se je kot bolj zanesljiv proces čiščenja realne industrijske odpadne vode izkazal postopek nanofiltracije, s predčiščenjem in variiranjem pH vrednosti.
Keywords:industrijska odpadna voda, nanofiltracija, variiranje pH vrednosti, flokulacija, ioni težkih kovin, aluminij, baker, železo
Year of publishing:2018
Place of performance:Maribor
Publisher:[P. Vouk]
Number of pages:XVI, 91 str.
Source:Maribor
UDC:628.316.12(043.2)
COBISS_ID:22253590 New window
NUK URN:URN:SI:UM:DK:AFSGTPCN
Views:1076
Downloads:127
Metadata:XML RDF-CHPDL DC-XML DC-RDF
Categories:KTFMB - FS
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:23.08.2018

Secondary language

Language:English
Title:Optimization of real industrial wastewater treatment process
Abstract:Stricter legislative demands require proper and efficient pre-treatment and cleaning of industrial wastewater. In this work the optimization of real industrial wastewater treatment from a metal processing industry has been carried out in order to reuse the cleaned water in an industrial process or at least to be suitable for discharge directly into the sewage. The aim of this study was to remove heavy metal ions (Al3+, Cu2+, Fe3+) from real industrial wastewater. The physico-chemical parameters (temperature, pH value, electrical conductivity, undissolved substances, sedentary substances, opacity, chemical oxygen demand-COD, biochemical oxygen demand-BOD and concentration of Al3+, Cu2+ in Fe3+ ions) of industrial wastewater were analyzed. Firstly efficiency pH variation was tested, followed by nanofiltration and flocculation process. Based on a comparison of the results before and after the wastewater treatment an optimal cleaning procedure was established. Results have shown that nanofiltration process (with selected NF2 membrane) at a working pressure 10 bar, crossflow 1,6 L/min, applying pre-filtering (7-12 µm) and initial variation of the pH value with 5M HCl, effectively removes aluminium, copper and iron ions up to 97%. Flocculation process using the flocculant agent CWL40 at 160 rpm and after 5 min of settling proved to be an effective method for cleaning the industrial wastewater. Al3+, Cu2+ and Fe3+ ions were removed between 90-98%. Nanofiltration process with initial pH variation and pre-cleaning was defined as the optimal process for purification of real industrial wastewater, because of physico-chmemical parameters which values were suitable for discharge directly into the sewage.
Keywords:industrial wastewater, nanofiltration, pH adjustment, flocculation, heavy metal ions, aluminium, copper, iron


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