20.500.12556/RUL-186504 Vrednotenje stabilnosti tridimenzionalno tiskanih nosilcev biomase v komunalni odpadni vodi Stability Assessment of three dimensional printed biomass carriers in municipal wastewater Reaktorji s premičnimi nosilci biomase (angl. Moving Bed Biofilm Reactor – MBBR) se za čiščenje komunalne odpadne vode uporabljajo majhni, lahki plastični nosilci, ki omogočajo pritrditev in rast aktivne biomase. V diplomskem delu smo uporabili 3-D natisnjene nosilce biomase iz materiala Fun To Do Nano Clear. Namen diplomskega dela je bil ovrednotiti stabilnost 3-D natisnjenih plastičnih nosilcev biomase v komunalni odpadni vodi. V prvem delu smo izvedli dva eksperimenta, ki sta se razlikovala v času trajanja izpostavljenosti 3-D natisnjenih nosilcev v komunalni odpadni vodi in v razmerju med volumnom nosilcev biomase in volumnom reaktorja. V drugem delu smo z vzorci, pridobljenimi med eksperimentom izluževanja 3-D nosilcev, izvedli tudi strupenostni test z malo vodno lečo Lemna minor, kjer smo določili toksičen vpliv izlužkov nosilcev na rast in produkcijo fotosintetskih pigmentov v členih male vodne leče. Rezultati so pokazali, da je pri večji napolnjenosti reaktorja prišlo do izluževanja organskih snovi in nosilcev v odpadno vodo. Izluževanja fosforja nismo zabeležili. Izlužki nosilcev so pokazali tudi zelo toksičen učinek na hitrost rasti, rast korenin male vodne leče in na inhibicijo sinteze fotosintetskih pigmentov (klorofila) znotraj členov male vodne leče. In MBBR systems (moving bed biofilm reactors), small and lightweight plastic carriers are used to support the attachment and growth of active biomass during the treatment of municipal wastewater. In this thesis, 3D-printed biomass carriers made from Fun To Do Nano Clear resin were used. The aim was to evaluate the stability of 3D-printed plastic biomass carriers in municipal wastewater. In the first part, two experiments were conducted, differing in the duration of exposure of the 3D-printed carriers to municipal wastewater and in the ratio between the volume of biomass carriers and the reactor volume. In the second part, samples obtained during the leaching experiment were used to perform a toxicity test with the aquatic plant Lemna minor (duckweed), in which we determined the toxic effects of the carrier leachates on growth and the production of photosynthetic pigments in the fronds of duckweed. The results showed that at higher reactor filling ratios, organic compounds were leached from the carriers into the wastewater. No phosphorus leaching was observed. The leachates exhibited a strong toxic effect on growth rate, root development, and the inhibition of photosynthetic pigment (chlorophyll) synthesis in the fronds of duckweed. MBBR reaktor komunalna odpadna voda razgradnja plastike strupenost MBBR reactor municipal wastewater plastic decomposition toxicity true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-09-02 13:45:28 2026-09-02 13:45:40 2026-09-18 10:14:25 0000-00-00 00:00:00 2026 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 26082 291569667 Tisaj_Patricija_-_Vrednotenje_stabilnosti_tridimenzionalno_tiskanih_nosilcev_biomase_v_komunalni.pdf Tisaj_Patricija_-_Vrednotenje_stabilnosti_tridimenzionalno_tiskanih_nosilcev_biomase_v_komunalni.pdf 1 F8DE0DE622AE161EAA79AB3DE9C12733 3986c77fe671fbe67bb09553b31e31bbf90e4d99c950472e6b3cdd1844a220f0 66f2584d-a6c3-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=245772 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0