20.500.12556/DKUM-78826 Študija izvedljivosti obdelave odpadne vode mesne industrije s flotacijo in biološkim čiščenjem magistrsko delo Feasibility study of meat industry wastewater treatment by flotation and biological methods Mesnopredelovalna industrija spada med največje porabnike vode, zato posledično proizvede veliko odpadnih vod. Te vode so obremenjene z velikimi količinami organskih in anorganskih snovi, fekalnih snovi in bakterij. V podjetju uporabljajo za obdelavo odpadne vode mehansko čiščenje in flotacijo. Nastalo goščo vozijo v bioplinarno, obdelana voda z razmeroma visoko vsebnostjo onesnaženja pa prehaja v centralno čistilno napravo na končno čiščenje, kar predstavlja velik strošek. Cilj magistrske naloge je načrtovati učinkovitejši postopek za obdelavo odpadne vode iz obrata mesne industrije. V laboratoriju smo izvedli JAR teste s štirimi koagulanti: železovim (III) kloridom, železovim (III) sulfatom, polihidroksi aluminijevim kloridom in hitozanom. Ugotovili smo, da je najprimernejši koagulant 40 % železov (III) klorid. Z dodatnim čiščenjem odpadne vode s koagulacijo in flokulacijo še niso doseženi standardi za izpust v vodotok, se pa taksa za obremenitev vode bistveno zmanjša. Postavili smo tudi procesno shemo z dodatnim biološkim čiščenjem. Ocenili smo, da bi imela obdelana voda po biološkem čiščenju razmeroma nizko vrednost KPK (204 mg/L O2). Kljub temu bi jo bilo treba odvajati na centralno čistilno napravo, vendar bi se taksa za obremenitev vode zmanjšala še za 64 %. Uporabno je tudi nastalo blato, iz katerega se v anaerobnih procesih proizvaja bioplin. Inkrementalna ekonomska primerjava med predlaganima postopkoma je pokazala, da dražja alternativa s koagulacijo z železovim (III) kloridom in biološkim čiščenjem ni ekonomsko upravičena, saj znaša inkrementalna donosnost investicije le 5,65 %. Ekonomsko ugodnejša alternativa je koagulacija z železovim kloridom, ki znatno zniža stroške in zahteva razmeroma nizko investicijo. The meat processing industry is one of the largest consumers of water, and consequently produces a lot of wastewater. These waters are loaded with large amounts of organic and inorganic substances, fecal substances and bacteria. The company uses mechanical treatment and flotation to treat wastewater. The resulting slurry is transported to the biogas plant, and the treated water with a relatively high content of pollution passes into the central treatment plant for final treatment, which represents a high cost. The aim of the master's thesis is to plan a more efficient process for the treatment of wastewater from the meat industry plant. In the laboratory, we performed JAR tests with four coagulants: iron (III) chloride, iron (III) sulfate, polyhydroxy aluminum chloride, and chitosan. We found that the most suitable coagulant is 40% iron (III) chloride. With the additional treatment of wastewater by coagulation and flocculation, the standards for discharge into the watercourse have not yet been achieved, but the fee for water load is significantly reduced. We also set up a process scheme with additional biological treatment. We estimated that the treated water would have a relatively low COD value (204 mg / L O2) after biological treatment. Nevertheless, it would have to be discharged to a central treatment plant, but the water load tax would be reduced by a further 64%. The resulting sludge, from which biogas is produced in anaerobic processes, is also useful. An incremental economic comparison between the proposed processes showed that the more expensive alternative of coagulation with iron (III) chloride and biological treatment is not economically justified, as the incremental return on investment is only 5.65%. A more cost-effective alternative is coagulation with ferric chloride, which significantly reduces costs and requires a relatively low investment. odpadne vode mesnopredelovalne industrije flokulacija/koagulacija železov(III) klorid flotacija anaerobno/aerobno čiščenje ekonomska analiza meat industry wastewater flocculation/coagulation ferric chloride flotation anaerobic /aerobic treatment economic analysis true true false [M. Brečko] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2021-03-09 18:56:53 2021-04-07 11:09:41 2022-08-09 19:51:05 0000-00-00 00:00:00 2021 0 Maribor 0 Maribor X, 47 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 628.34/.35(043.2) 58690307 MAG_Brecko_Medea_2021.pdf MAG_Brecko_Medea_2021.pdf 1 85F2703DD8D54BFEEDF438AAF96A1649 9191fc9e0401252799b518ecd135581ce769e0fb3f370889abe1d29a9bd8383b c1edfbc9-9064-11eb-8842-00155d0001ca 20.500.12556/dkum/2ff9f574-cc9e-4f4d-b392-5048e0f52937 https://dk.um.si/Dokument.php?lang=slv&id=149537 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0