20.500.12556/DKUM-55254 MOŽNOST UPORABE OBDELANE KOMPOSTNE VODE KOT GNOJILO THE POSSIBILITY OF USING TREATED COMPOST WATER AS FERTILIZER Kompostna voda je stranski produkt razgradnje organskih odpadkov. Med procesom razgra-dnje organskih odpadkov se tvori voda, ki se počasi pretaka po kompostu, pri tem pa se bogati z nevarnimi snovmi, kot so težke kovine. Pri tem lahko povzroči veliko onesnaženje, če jo neobdelano izpustimo v vodotok. Bolje je, če se lahko ponovno uporabi, predvsem kot gnojilo, saj vsebuje visoke koncentracije hranil, ki jih rastline potrebujejo za svojo rast. V magistrskem delu smo v začetni fazi kompostno vodo mehansko očistili (centrifugiranje) ter izvedli analize, kot so: pH, κ, KPK, motnost, težke kovine in fosfor. Sledila je obdelava kompostne vode s hitozanom (v obliki nanodelcev) različnih koncentracij pri različnih pH vrednostih. Po fizikalno – kemijski ločitvi vodne faze od kovinskega kelata hitozana, smo določili vsebnost kovin v obdelani kompostni vodi s pomočjo atomske absorpcijske spektro-fotometrije. Ugotovili smo, da ima pri obdelavi vode z raztopino hitozana veliko vlogo pH raztopine, saj pri višjih pH vrednostih, zaradi konformacije klobčiča in večje specifične površine, hitozan odstrani več težkih kovin. Nadalje smo tako obdelano kompostno vodo analizirali glede na zahteve gnojil ter preverili uporabnost le-te s kalilnimi testi vrtne kreše Lepidium sativum L. Na podlagi rezultatov smo obdelano vodo s hitozanskimi nanodelci uvrstili v potencialni tip mineralnega substrata ali tip gnojila. Compost water is a byproduct of decomposition of organic waste during composting. Water slowly flows through the compost, while being enriched with dangerous substances, such as heavy metals. Untreated compost leachate shall be not discharged into the environment. It is better to reuse compost leachate, primarily as a fertilizer because it contains high concentra-tions of nutrients, which are needed for plants’ growth. In the thesis the initial phase is presented where compost water was mechanically purified (centrifugation) and analysis such as pH, κ, KPK, turbidity, heavy metals, and phosphorus were performed. The treatment of the compost water with chitosan (in the form of nanoparti-cles) followed with various concentrations at different pH values. After the physical - chemi-cal separation of the aqueous phase from chitosan chelate, the metal content was determined in the treated compost water by atomic absorption spectrophotometry. We have found out that pH of the solution is very important, since only at higher pH values, more heavy metals were removed due to the conformation of chitosan coil and its larger specific surface area. Furthermore, we have also analyzed treated compost water according to the requirements of fertilizers and verify the usefulness of the germination tests with seed beds of garden cress Lepidium sativum L. Based on the results the treated water with chitosan nanoparticles was examined as the potential type of mineral substrate or fertilizer. kompostna voda hitozan hitozanski nanodelci kovine gnojilo recikliranje kalilni test. composting water chitosan chitosan nanoparticles metals fertilizer recycling germination test. true true false [T. Kondić] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2015-10-12 17:08:21 2015-10-30 11:23:13 2022-06-08 03:11:24 2021-05-14 03:16:55 2015 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 2018-10-30 628.477.3(043.2) 19440918 URN:SI:UM:DK:WJXKOKDN MAG_Kondic_Tanja_2015.pdf MAG_Kondic_Tanja_2015.pdf 1 E6A5487EC4C7EC7DA8CF82F1E36DA2F1 66e5e216d1839055d08ec07614a5f35637b3b6325c9666c1c2e97222a2f31273 47e20907-7c07-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=82715 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0