Modeliranje dinamike ortofosfata pri radu elektrokoagulacijskog uređaja sa željeznim elektrodama

master's thesis

• Title (english): Modeling the electrocoagulation treatment of orthophosphate with iron electrods
• Author: Antonela Musa
• Mentor: Goran Gjetvaj (mentor)
• Committee member: Damir Bekić (predsjednik povjerenstva)
• Committee member: Goran Gjetvaj (član povjerenstva)
• Committee member: Goran Lončar (član povjerenstva)
• Granter: University of Zagreb; Faculty of Civil Engineering; (Water Research); Zagreb
• Defense date and country: 2019-07-04, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Civil Engineering; Hydrotechnology

Abstract

Provedeno je istraživanje učinka elektrokoagulacijskog procesa sa željeznim (Fe) elektrodama na smanjenje masene koncentracije fosfata u vodi. Primijenjene su gustoće struje od 30, 75 i 150 A m-2 te inicijalna koncentracija fosfata od 27 mg/L (PO4-P). Postignuta je učinkovitost uklanjanja od 81% nakon 90 min rada reaktora s ugrađenim Al elektrodama pri gustoći struje od 75 A m-2 i uz inicijalnu koncentraciju NaCl od 2 g dm-3. Osim koncentracije fosfata (PO4-P), u komori elektrokoagulacijskog... More laboratorijskog pilot uređaja praćene su i promjene koncentracije otopljenog kisika (DO), te promjene temperature vode i pH. 3D numerički model primijenjen je za simulaciju polja strujanja i koncentracije fosfata u komori elektrokoagulacijskog uređaja. Modelom pronosa fosfata obuhvaćeni su procesi generiranja i taloženja flokula, te adsorpcije fosfata na flokule. Modelska parametrizacija temelji se na rezultatima mjerenja. Less

Abstract (english)

The efficiency of the electrocoagulation (EC) process for the removal of phosphate (PO4-P) is analyzed using a batch pilot device with iron electrodes situated within the reactor. The applied current density at the electrodes (30, 75 and 150 A/m2) was the focus of the research. The initial PO4-P concentration is the same in all experiments (27 mg PO4-P/L). The concentrations of PO4-P and dissolved oxygen (DO), as well as the water temperature and pH, were measured in the batch chamber. The... More initial PO4-P concentration is reduced by 81 % after 90 min of reactor operation when the initial NaCl concentration is 2 g/L, while the current density is maintained at 75 A/m2. Additionally, a three-dimensional (3D) numerical model for PO4-P removal via the EC process is developed. By using the 3D numerical model, spatially continuous velocity fields and the PO4-P concentration were determined. Numerical model of PO4-P transport includes the processes of phosphate adsorption on flocculent, along with coagulated particles settling. Numerical model parametrization relies on the measurement results from the experiments made on batch pilot device. Less

• Keywords: elektrokoagulacija; pilot uređaj; numerički model; fosfat
• Keywords (english): electrocoagulation; pilot device; numerical model; phosphate
• Language: croatian
• URN:NBN: urn:nbn:hr:237:248330
• Study programme: Title: Civil Engineering; specializations in: Construction Management, Transportation Engineering, Geotechnical Engineering, Hydraulic Engineering, Structural Engineering, Construction Materials, Theory and Modeling of Structures; Course: Hydraulic Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka građevinarstva (magistar/magistra inženjer/inženjerka građevinarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2019-11-20 07:52:43