20.500.12556/DKUM-64739 PRIPRAVA ODPADNE VODE ZA PONOVNO UPORABO V TEHNOLOŠKEM PROCESU PREPARATION OF WASTEWATER FOR REUSE IN TECHNOLOGICAL PROCESS Cilj magistrskega dela je, da odpadne vode iz treh različnih proizvodnih procesov očistimo in ponovno uporabimo v proizvodnji. Merilo čistosti so predstavljali okoljevarstveni standardi o dovoljenih emisijah snovi v površinske vode, ki jih predpisuje država. Količinsko največ odpadne vode priteče iz proizvodne linije pranja glinice (GKT-VLS), s povečano koncentracijo trdnih delcev, natrija, aluminija, nitratnega dušika in kloridnih elementov. Druga vrsta odpadne vode je iz proizvodne linije boehmita, s povečano koncentracijo trdnih delcev, natrija, aluminija in nitratnega dušika. Tretja vrsta odpadne vode prihaja iz kotlarne, kjer se proizvaja visokotlačna para. Kotlarna posledično proizvaja kisle in bazične odpadne vode zaradi regeneracije ionskih smol, ki se uporabljajo za kemijsko pripravo vode za kotle. Vse tri vrste vod smo zmešali v realnem razmerju. Najprej smo vode nevtralizirali z uporabo 35 % HCl. Nato je sledila filtracija z naplavno plastjo perlita, s katero smo znižali vrednost suspendiranih snovi s 320 mg/l na samo 9 mg/l. S filtracijo še vedno nismo uspeli razrešiti težave s previsokimi vrednostmi aluminija, natrija in kloridov, ki so presegali okoljevarstvene standarde. Zato smo izvedli laboratorijske poskuse z uporabo modulov za reverzno osmozo. Vsebnosti onesnažil smo uspeli znižati pod mejne vrednosti. Vsebnost aluminija smo znižali pod mejno vrednost aluminija 3 mg/l, vsebnost natrija smo zmanjšali na 145 mg/l in kloridov na 193 mg/l. A goal of this Master’s thesis was to clean those wastewaters from three production processes that exceeded limit values of solid particles, sodium, aluminum, chloride, nitrogen and pH value, and reuse it in the production. The environmental standards, regarding emissions of substances released into surface water represented the purity criteria. Wastewaters from three different production processes were gathered together in order to be reused after the proper treatment. Quantitatively the majority represented wastewaters coming from the production line of alumina washing (GKT – VLS). The central mother liquid has exaggerated concentration of particles, sodium, aluminum, nitric nitrogen and chloride. The second type of wastewater is coming from the production line of boehmite. The third type of wastewater is coming from boiler house, where the high-pressure vapor is produced. In first step the neutralization was necessary with the usage of 35% of HC1. This was followed by filtration through alluvium layer, with which we have reduced the level of suspended solids from 320 mg/l to only 9 mg/l. We haven´t succeed to resolve the problems of high aluminum, sodium and chlorides concentrations, which have exceeded the environmental standards. Therefore, the laboratory reverse osmosis was applied in order to remove the pollutants from water. We succeeded in removal of all pollutants. The concentration of aluminum was reduced below 3 mg/l. The sodium content was reduced to 145 mg / l. We could reduce chlorides to 193 mg / l. reverzna osmoza nevtralizacija filtracija ICP analiza industrijska odpadna voda reverse osmosis neutralization filtration IPC analysis industrial wastewater true true false [A. Lorber] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2016-11-29 23:40:32 2017-01-05 15:03:26 2022-07-06 03:06:19 2019-07-11 14:11:37 2016 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 2020-01-05 628.179.2(043.2) 20320278 URN:SI:UM:DK:PIPDGJO6 MAG_Lorber_Ales_2016.pdf MAG_Lorber_Ales_2016.pdf 1 D4C57487FDC538DE349AC63148FBD6E1 1d1ebe7f2672409c64193ab927db4c640140856eb4f753c5315398e7c7664cce e7ee0844-7c0d-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=108825 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0