Primjena elektrokoegulacijskog postupka za pročišćavanje zauljene otpadne vode

master's thesis

• Title (english): Application of electrocoagulation treatment for oily wastewater
• Author: Luka Šikić
• Mentor: Goran Lončar (mentor)
• Committee member: Dalibor Carević (predsjednik povjerenstva)
• Committee member: Ivan Halkijević (član povjerenstva)
• Committee member: Goran Lončar (član povjerenstva)
• Granter: University of Zagreb; Faculty of Civil Engineering; (Water Research); Zagreb
• Defense date and country: 2021-09-23, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Civil Engineering; Hydrotechnology

Abstract

Rad prikazuje sprovedena laboratorijska istraživanja korištenja postupka elektrokoagulacije pri pročišćavanju dekantirane i izmiješane zauljene otpadne vode. Laboratorijska ispitivanja su se odvijala u laboratoriju Građevinskog fakulteta u Zagrebu. Radom se odredio utjecaj vrsta elektroda (nehrđajući INOX čelik, željezo Fe, aluminij Al), kontaktnog vremena (10-40 minuta) i jakosti struje (5, 10 ili 15 A) na različite parametre zauljene otpadne vode. Praćeni su sljedeći operativni parametri ispitivanih uzoraka: pH vrijednost uzorka, električna provodljivost, koncentracija otopljenog kisika, temperatura, kemijska potrošnja kisika, taloženjei zamućenost. Provedenim laboratorijskim ispitivanjima Hrvatskih voda i ispitivanjima u laboratoriju Građevinskog fakulteta određen je visoki stupanj pročišćenosti obje vrste uzorka primjenom postupka elektrokoagulacije. Ispitivanjima se utvrdilo povećanje pH vrijednosti i temperature, dok je za električnu provodljivost i zamućenost utvrđeno smanjenje tijekom provedbe pokusa. Koncentracija otopljenog kisika raste korištenjem elektroda nehrđajućeg čelika, dok primjenom željeznih i aluminijskih elektroda otopljeni kisik opada u uzorku. Radom se ukazuje na veliku učinkovitost taloženja u odnosu na konvencionalne postupke kemijske koagulacije. Visoki stupanj pročišćenosti, stupanj smanjenja zamućenosti i učinkovitost taloženje čine postupak elektrokoagulacije vrijednom i ekonomičnom tehnologijom pročišćavanja zauljenih otpadnih voda.

Abstract (english)

This paper presents laboratory research applying electrocoagulation treatment on decanted and mixed oily wastewater. Laboratory research was conducted in the Laboratory of Faculty of Civil Engineering in Zagreb. Effects of altering aluminium (Al), iron (Fe) and stainless inox steel electrodes, contact reaction times between 10 and 40 minutes and different current strengths (5, 10 or 15 Ampere) on the parameters of the oily wastewater were the study of this paper. Following operational parameters were observed during research: pH range, dissolved oxygen concentration, conductivity, temperature, precipitation, opacity and COD. Laboratory analysis determined a high degree of treatment regarding COD levels using electrocoagulation treatment. The pH range and temperature of the wastewater increased, while conductivity and opacity values dropped after the treatment. Concentrations of dissolved oxygen raised while stainless steel electrodes were being used, while using iron and aluminium electrodes concentrations dropped. High efficiency of sludge sedimentation has been determined in comparison to conventional chemical coagulation. High degrees of COD treatment, high opacity-lowering capabilities and efficient sedimentation prove that electrocoagulation treatment is a valuable technological method and a suitable alternative to conventional technologies used in oily wastewater treatment.

• Keywords: elektrokoagulacija; zauljene otpadne vode; pročišćavanje otpadnih voda
• Keywords (english): electrocoagulation; oily wastewater; wastewater treatment
• Language: croatian
• URN:NBN: urn:nbn:hr:237:003460
• 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: Construction Management; 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: 2022-01-11 08:51:08