magistrsko delo
Laura Jug (Author), Julija Volmajer Valh (Mentor), Sandra Janežič (Mentor), Dejan Rob (Co-mentor)

Abstract

Velika količina sedimenta, ki nastane pri čiščenju odpadnih voda iz mlečno predelovalne industrije, skupaj z okoljskimi vplivi in strogimi zakonskimi predpisi predstavlja problematičen segment in postavlja vprašanje glede njegovega trajnostnega upravljanja. V magistrski nalogi smo z namenom raziskanja ponovne uporabe sedimenta po čiščenju odpadnih voda iz mlečno predelovalne industrije preučili primernost štirih organskih polielektrolitov kot alternativnih reagentov klasičnim anorganskim koagulacijskim sredstvom. Z izvedbo JAR testa in uporabo nizko molekularnega hitozana, natrijeve karboksimetil celuloze, polietilenimina in kolagena smo preverili učinkovitost čiščenja odpadnih voda iz mlečno predelovalne industrije ter pri tem analizirali karakteristike nastalega sedimenta. Rezultati so pokazali, da z izbrano metodo in uporabljenimi koaglacijsko/flokulacijskimi sredstvi pri preiskovanih pogojih nismo uspeli zadostno odstraniti v vodi prisotne nečistoče in s tem prečistiti vode tako, da bi ustrezala zakonsko določenim mejnim parametrom. Z vidika nastalega sedimenta smo najboljše rezultate obarjanja dosegli z uporabo nizko molekularnega hitozana in s spreminjanjem vrednosti pH po končanem JAR testu. Na podlagi dobljenih rezultatov IR spektroskopije smo v nastalem sedimentu zaznali signale, ki nakazujejo na prisotnost organskih kislin in vezi ogljikovodikov oborjenih iz odpadne vode. Končna analiza sestave mikrobne združbe je pokazala, da v pridobljenem sedimentu primarno ni prisotnih patogenih mikroorganizmov oziroma bakterij.

Keywords

sediment;odpadna voda;mlečno predelovalna industrija;polielektroliti;krožno gospodarstvo;magistrske naloge;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UM FS - Faculty of Mechanical Engineering
Publisher: [L. Jug]
UDC: 628.334.5(043.2)
COBISS: 27353603 Link will open in a new window
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Downloads: 58
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Other data

Secondary language: English
Secondary title: Potential re-use of sediment after dairy industry waste water treatment
Secondary abstract: A large amount of sediment is, produced as a product of the dairy industry wastewater treatment process, and coupled with environmental impacts and strict legal regulations, a problematic segment of the sustainable development of dairy industry. The aim of the master´s thesis was to explore the possibility of sediment reuse by means of the dairy industry wastewater treatment. We studied the suitability of four organic polyelectrolytes as alternative reagents to classic inorganic coagulants. By means of the jar test, we analyzed the efficiency of dairy industry wastewater treatment using low molecular weight chitosan, sodium carboxymethyl cellulose, polyethyleneimine and collagen. After the test had been carried out, we analyzed the characteristics of the resulting sediment. The results have shown that the measured water quality parameters do not comply with the legal parameter values; therefore, the method used has proved to be ineffective at removing the water pollutants. According to the formed sediment, the best precipitations results were achieved through the use of low molecular weight chitosan, and through the change of pH values that was performed at the end of the jar test. Based on the results from IR spectroscopy, vibrations of the sediment were detected, which indicate the presence of organic acids and hydrocarbon bonds precipitated from wastewater. The final analysis of the microbial community structure suggested that no pathogenic microorganisms or bacteria were present in the sediment.
Secondary keywords: sediment;waste water;dairy industry;polyelectrolytes;circular economy;
Type (COBISS): Master's thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za strojništvo, Tehniško varstvo okolja
Pages: XII, 68 str.
ID: 11788246