Optimiranje koagulacijske predobrade sirove vode bogate prirodnim organskim tvarima

master's thesis

• Title (english): Optimization of coagulation pretreatment of raw water rich in natural organic matter
• Author: Igor Ahac
• Mentor: Hrvoje Juretić (mentor)
• Mentor: Hrvoje Cajner (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2015-12-04, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

Istraživan je postupak optimiranja modificirane koagulacije pomoću faktorskog plana pokusa i metode odzivne površine na uzorcima podzemne vode. Istovremeno se pratio utjecaj pH vrijednosti uzorka i koncentracija koagulanata na sadržaj otopljenog organskog ugljika kao surogatnog parametra prisutnosti prirodne organske tvari u vodi. Korišteni su anorganski koagulanti željezo(III) klorid i aluminij-sulfat bez dodatka polimernih flokulanata. Učinkovitost uklanjanja prirodne organske tvari analizirana je pomoću računalnog programa Design Expert 7. Rezultati dobiveni regresijskom analizom dali su parametre maksimalnog uklanjanja otopljenog organskog ugljika. Uz korištenje željezo(III) klorida pri koncentraciji od 50 mg∙L-1 i pH vrijednosti 5,15 pokazalo se da je količina uklonjenog otopljenog organskog ugljika 69%.

Abstract (english)

A bench-scale study was conducted to evaluate the effectiveness of enhanced coagulation using full factorial design of experiment and response surface method. The jar tests were performed on groundwater samples. The impact on the concentration of dissolved organic carbon was monitored with prior pH adjustment and by varying coagulant dosage. Inorganic coagulants – ferric chloride and aluminum sulfate were used without the addition of polymer as a flocculant aid. The natural organic matter removal efficiency was analyzed using Design Expert 7. Ferric chloride showed optimal results at the concentration value of 50 mg∙L-1 with prior pH adjustment to 5,15. The dissolved organic carbon removal was 69%.

• Keywords: modificirana koagulacija; prirodna organska tvar; željezo(III) klorid; aluminij-sulfat; faktorski plan pokusa; metoda odzivne površine
• Keywords (english): enhanced coagulation; natural organic matter; ferric chloride; aliminum sulfate; full factorial design of experiment; response surface method
• Language: croatian
• URN:NBN: urn:nbn:hr:235:988639
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2019-05-27 12:56:56