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Title:UČINEK ČIŠČENJA ODPADNE VODE V SEKVENČNEM BIOLOŠKEM REAKTORJU PRI RAZLIČNIH TEMPERATURNIH POGOJIH
Authors:ID Žuljan, Matej (Author)
ID Simonič, Marjana (Mentor) More about this mentor... New window
ID Klasinc, Aljaž (Comentor)
Files:.pdf UN_Zuljan_Matej_2016.pdf (3,37 MB)
MD5: 843D60B8D9A81F44D6210956A56190E5
 
Language:Slovenian
Work type:Undergraduate thesis
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Namen raziskave je ugotoviti vpliv nizkih temperatur na aktivno blato v aerobni biološki čistilni napravi. Primerjamo učinke čiščenja po izpostavljenosti aktivnega blata različnim temperaturnim pogojem. Eksperiment razdelimo na 3 dele in ga izvajamo v pilotnem eksperimentalnem sekvenčnem biološkem reaktorju. V celotnem eksperimentu čistimo modelno vodo na sobni temperaturi (22 °C). Prvi del eksperimenta izvajamo z adaptiranim aktivnim blatom. Merimo vtočno in iztočno koncentracijo KPK in iz rezultatov izračunamo učinek čiščenja. Rezultate učinka čiščenja tega eksperimenta primerjamo z učinki čiščenja drugih delov eksperimenta. V 2. delu eksperimenta adaptirano aktivno blato ohladimo na temperaturo 4 °C za 7 dni. Aktivno blato, ki je bilo hlajeno prelijemo nazaj v pilotni sekvenčni biološki reaktor. Iz rezultatov vtočne in iztočne koncentracije KPK izračunamo učinek čiščenja. V 3. delu eksperimenta blato zamrznemo na temperaturo 20 °C za 24 dni, odtalimo na sobno temperaturo in prelijemo nazaj v pilotni sekvenčni biološki reaktor. Vnovič izračunamo učinke čiščenja iz rezultatov vtočnega in iztočnega KPK. Primerjava rezultatov učinkov čiščenja med adaptiranim aktivnim blatom in predhodno ohlajenim aktivnim blatom je pokazala, da se bioaktivnost blata povrne že po nekaj dneh. Učinki čiščenja prej ohlajenega aktivnega blata so po nekaj dneh primerljivi učinkom čiščenja adaptiranega aktivnega blata. Primerjava rezultatov med adaptiranim blatom in predhodno zamrznjenim in spet odtaljenim blatom je pokazala, da je bioaktivnost na začetku nižja. Učinek čiščenja vztrajno narašča. Po 14 dneh je blato ponovno adaptirano in učinek čiščenja je primerljiv z učinkom čiščenja adaptiranega aktivnega blata. Zaključimo lahko, da aktivno blato, ki je izpostavljeno nizkim temperaturam pri katerih lahko zamrzne in odmrzne, povrne biološko aktivnost in se vnovič adaptira po določenem času, zato je primerno za nadaljnjo uporabo v bioloških čistilnih napravah.
Keywords:učinek čiščenja, aktivno blato, vpliv temperature, sekvenčni biološki reaktor, odpadna voda, zamrzovanje in odtajanje aktivnega blata
Place of publishing:Maribor
Publisher:[M. Žuljan]
Year of publishing:2016
PID:20.500.12556/DKUM-63432 New window
UDC:628.336.8:628.356(043.2)
COBISS.SI-ID:20319254 New window
NUK URN:URN:SI:UM:DK:1HGTHSZ1
Publication date in DKUM:29.09.2016
Views:1919
Downloads:198
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
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Secondary language

Language:English
Title:WASTEWATER PURIFICATION EFFICIENCY IN SEQUENCE BATCH REACTOR AT DIFFERENT TEMPERATURES
Abstract:The purpose of the research is to determine the effect of low temperatures on the activated sludge in the aerobic biological treatment plant. Wastewater purification efficiencies are compared, after activated sludge exposure at different temperatures. The experiment is divided into 3 parts and is carried out in a pilot experimental sequential biological reactor. Synthetic wastewater treatment is operated at room temperature (22 °C) in the entire experiment. The first part of the experiment is carried out with adapted activated sludge. The influent and effluent concentrations of COD are measured and the purification efficiency is calculated from the results. The results of this part of the experiment are compared with the results of the other two parts. The second part of the experiment consists of cooling the adapted activated sludge at 4 °C for 7 days, then pouring it into the sequencing batch reactor and measuring the influent and effluent COD. Once again Purification efficiency is calculated from COD results. In the third part of the experiment the activated sludge is frozen to -20 °C for 24 days, then thawed to room temperatures and poured back into the pilot sequencing batch reactor. Once again purification efficiency is calculated. The comparison of results of purification efficiencies of the adapted sludge and the pre-cooled activated sludge revealed that the bioactivity recovers within a few days. The effects of the purification of the cooled activated sludge are comparable with purification efficiency of adapted activated sludge. A comparison of results between the adjusted activated sludge and the pre-frozen and thawed sludge revealed that the bioactivity at the beginning of the experiment was lower. The purification efficiency was growing steadily. After 14 days the activated sludge recovered activity and the purification efficiency is comparable to that of the non-frozen activated sludge. It can be concluded that the activated sludge which was exposed to subfreezing temperatures has the potential to restore bioactivity and to adapt again after a certain length of time and is suitable for further use in biological wastewater treatment plants.
Keywords:purification efficiency, activated sludge, temperature effect, Sequencing batch reactor, wastewater treatment, freezing and thawing of activated sludge


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