Študija izvedljivosti obdelave odpadne vode mesne industrije s flotacijo in biološkim čiščenjem : magistrsko delo

Brečko, Medea

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Title:	Študija izvedljivosti obdelave odpadne vode mesne industrije s flotacijo in biološkim čiščenjem : magistrsko delo
Authors:	ID Brečko, Medea (Author) ID Novak-Pintarič, Zorka (Mentor) More about this mentor... ID Simonič, Marjana (Comentor)
Files:	MAG_Brecko_Medea_2021.pdf (3,82 MB) MD5: 85F2703DD8D54BFEEDF438AAF96A1649 PID: 20.500.12556/dkum/2ff9f574-cc9e-4f4d-b392-5048e0f52937
Language:	Slovenian
Work type:	Master's thesis/paper
Typology:	2.09 - Master's Thesis
Organization:	FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:	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.
Keywords:	odpadne vode mesnopredelovalne industrije, flokulacija/koagulacija, železov(III) klorid, flotacija, anaerobno/aerobno čiščenje, ekonomska analiza
Place of publishing:	Maribor
Place of performance:	Maribor
Publisher:	[M. Brečko]
Year of publishing:	2021
Number of pages:	X, 47 f.
PID:	20.500.12556/DKUM-78826
UDC:	628.34/.35(043.2)
COBISS.SI-ID:	58690307
Publication date in DKUM:	07.04.2021
Views:	1214
Downloads:	100
Metadata:
Categories:	KTFMB - FKKT
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Licences

License:	CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International

Link:	http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:	The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:	09.03.2021

Secondary language

Language:	English
Title:	Feasibility study of meat industry wastewater treatment by flotation and biological methods
Abstract:	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.
Keywords:	meat industry wastewater, flocculation/coagulation, ferric chloride, flotation, anaerobic /aerobic treatment, economic analysis

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