20.500.12556/DKUM-23092 VPLIV OZONIRANJA NA STOPNJO BELINE IN MIKROBIOLOŠKO STABILNOST SUSPENZIJE CaCO3 THE INFLUENCE OF THE OZONATION ON THE WHITNESS AND MICROBIOLOGICAL STABILITY OF THE CaCO3 SUSPENSION Kalcijev karbonat je kemična spojina, ki ima zaradi svojih lastnosti edinstven pomen in vlogo v mnogih vejah industrije, bodisi kot polnilo ali pigment. Uporablja se predvsem v proizvodnji papirja, plastike, gume ter v farmacevtski in živilski industriji. V naravi se nahaja v različnih oblikah - kot apnenec, kreda ali marmor. Glede na izvor je lahko rahlo rumenkasto obarvan, kar kazi belino čistega CaCO3. Pogoj za dobro kakovost karbonatnih polnil je poleg odlične beline tudi, da je njihova suspenzija stabilna in mikrobiološko neoporečna. Zato v postopku predelave karbonatna polnila zaščitijo proti razpadu suspenzije in mikrobiološki nestabilnosti s kemijskimi dodatki kot so biocidna sredstva, različni konzervansi, vodikov peroksid in dispergirna sredstva. Uvedba postopka ozoniranja v tehnološki proces priprave suspenzije CaCO3 je priložnost izboljšati belino suspenzije CaCO3 in hkrati zagotoviti mikrobiološko stabilnost izdelka ter na ta način zmanjšati porabo biocidnih sredstev in belil. Calcium carbonate as chemical compound with specific properties is highly significant and plays a unique role in various branches of industry. It could be applied as filler or a pigment. It is used mainly in paper, plastic, rubber, pharmaceutical and food industry. Its most common natural forms are limestone, chalk or marble. Depending on its origin it can be yellowish, which negatively influences the whiteness of pure CaCO3. Carbonate fillers of good quality should in addition to excellent whiteness be stable and microbiologically impeccable in suspension. To achieve the high quality of product, carbonate filler suspensions are protected against destabilization and microbiological infection with biocides, various preservatives, hydrogen peroxide and dispersants in the production phase. Introduction of the ozonation process into technological process of producing the suspension CaCO3 is a promissing opportunity to improve CaCO3 suspension's whiteness and at the same time ensure microbiological stability of the product and reduce use of biocides and whitening agents. kalcijeva karbonatna polnila CaCO3 ozoniranje pH vrednost električna prevodnost belina mikrobiologija presejalni test Calcium Carbonate filler CaCO3 ozonation pH value electrical conductivity whiteness microbiology screening test true true false [J. Bezgovšek] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2012-05-22 13:10:48 2012-06-29 12:48:41 2022-04-14 12:21:40 2023-12-31 03:15:25 2012 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 628.166.094.3-926.214(043.2) 16303126 URN:SI:UM:DK:SGIEKO3X UNI_Bezgovsek_Jerneja_2012.pdf UNI_Bezgovsek_Jerneja_2012.pdf 1 3860304CED2C06373E2A874932040FA0 ef414609888bcc683b8a73ab89113d5eefb036289ab4c1015354a7a823944775 9cb53e55-7c06-11eb-bb7a-00155d0001ca 20.500.12556/dkum/f8f3aa12-1d44-4c80-9e11-44a27d7c5d38 https://dk.um.si/Dokument.php?lang=slv&id=30121 Fakulteta za strojništvo 0 0 0