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Title:Zniževanje vsebnosti snovi v mlekarski odpadni vodi
Authors:ID Meničanin, Urška (Author)
ID Simonič, Marjana (Mentor) More about this mentor... New window
ID Janežič, Sandra (Comentor)
Files:.pdf MAG_Menicanin_Urska_2017.pdf (1,94 MB)
MD5: 5EC19B21772A7EC9FFC47D74C815C80D
PID: 20.500.12556/dkum/161e1066-cc92-4f87-a6e8-86896579d2c7
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Namen magistrskega dela je bil ugotoviti, ali je koagulacija z uporabo naravnih koagulantov, ki nimajo neželenih učinkov na okolje, konkurenčna koagulaciji s sintetičnimi koagulanti, ki so prisotni na trgu. Želeli smo ugotoviti, ali je sama koagulacija v kombinaciji z nadaljnjo nanofiltracijo dovolj dobra metoda čiščenja za možno ponovno uporabo očiščene mlekarske odpadne vodo iz podjetja Pomurske mlekarne, d. d. Poleg očiščenja odpadne vode smo želeli ugotoviti morebitno uporabnost sedimenta, nastalega v procesu koagulacije. Želeli smo najti optimalno koncentracijo naravnega koagulanta in optimalni začetni pH koagulacije. Opravili smo naslednje fizikalno-kemijske meritve: motnost, pH, spektralni absorbijski koeficient, vsebnost suspendiranih delcev, vsebnost raztopljenih delcev in vsebnost organskih snovi, izraženih kot kemijska potreba po kisiku – KPK. Na podlagi dobljenih rezultatov fizikalno-kemijskih parametrov smo ugotovili znižanje suspendiranih delcev, ki je v skladu z znižanjem motnosti po opravljeni koagulaciji in po opravljeni nanofiltraciji. Dosegli smo zadostno znižanje KPK, ki zadošča mejnim vrednostim Republike Slovenije za izpust v kanalizacijo ali okolje. Znižanje KPK je bilo po nanofiltraciji 98,5 %. Opazili smo trend povišanja amonijevih ionov po koagulaciji s hitozanom pri pH 4, kar smo pripisali delovanju funkcionalnih spojin hitozana v kislem območju, ko se tvorijo skupine NH3+, ki prispevajo k zaznavi amonijevih ionov. Zaključimo lahko, da je uporaba kombinacije koagulacije z naravnim koagulantom hitozanom in nanofiltracijo za čiščenje odpadne mlekarske vode v podjetju Pomurske mlekarne, d. d., za namene ponovne uporabe smiselna.
Keywords:koagulacija, nanofiltracija, hitozan, odpadna voda, KPK, mulj
Place of publishing:Maribor
Publisher:[U. Meničanin]
Year of publishing:2017
PID:20.500.12556/DKUM-67714 New window
UDC:628.316:637.1(043.2)
COBISS.SI-ID:21048854 New window
NUK URN:URN:SI:UM:DK:BBN0C1QM
Publication date in DKUM:18.09.2017
Views:1580
Downloads:207
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
:
MENIČANIN, Urška, 2017, Zniževanje vsebnosti snovi v mlekarski odpadni vodi [online]. Master’s thesis. Maribor : U. Meničanin. [Accessed 25 April 2025]. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=67714
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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:28.08.2017

Secondary language

Language:English
Title:Lowering the levels of the substances in dairy wastewater
Abstract:The purpose of the master's work was to determine whether coagulation using natural coagulants that do not have adverse effects on the environment, can compete with coagulation with synthetic commercial coagulants. We wanted to determine whether water quality from the dairy company Pomurske Mlekarne d. d. after coagulation in combination with further nanofiltration meet the standards for reuse of treated waste water. In addition, we wanted to determine the potential usefulness of the sediment formed in the coagulation process. We wanted to find the optimal dose of the natural coagulant, as well as the optimal initial pH of the coagulation. We conducted the following physico - chemical measurements: turbidity, pH, spectral absorption coefficient, content of suspended particles, content of dissolved particles and organic matter content, expressed as a chemical oxygen demand - COD. Based on the results of physico - chemical parameters, we found a reduction of suspended particles, which is in line with the reduction of turbidity after the coagulation, as well as after the nanofiltration. We have reached a sufficient reduction of COD, which satisfy the limit values of the Republic of Slovenia for release into the sewage system or into the environment. The reduction in COD was 98,5 % after nanofiltration. We observed a trend of increase of ammonium ions after coagulation with chitosan at a pH of 4, which we assigned to the functional compounds of chitosan in the acidic range as of NH3+ groups are formed, which contribute to the detection of the ammonium ions. It can be concluded that the use of combination of coagulation with the natural coagulant chitosan and nanofiltration for purification of waste water in the dairy company Pomurske Mlekarne d. d. with purpose of reuse is reasonable.
Keywords:coagulation, nanofiltration, chitosan, waste water, COD, sludge


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