Optimizacija koagulacije obrade tekstilne otpadne vode

undergraduate thesis

• Title (english): Optimization of coagulation of textile wastewater
• Author: Jelena Bošnjak
• Mentor: Davor Dolar (mentor)
• Committee member: Davor Dolar (predsjednik povjerenstva)
• Committee member: Vilko Mandić (član povjerenstva)
• Committee member: Marko Racar (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2020-09-24, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Kompleksni sastav i toksičnost otpadnih voda nastalih u tekstilnoj industriji predstavlja veliki izazov u njenoj obradi. Jedan od postupaka koji se primjenjuje je kemijska koagulacija čija optimizacija ima znatnu ulogu u njenoj učinkovitosti. Cilj ovog rada je pronalaženje kombinacije optimalnih uvjeta pH i koncentracije koagulanta željezova(III) klorida za učinkovito uklanjanje ukupnog organskog ugljika (TOC), smanjenje mutnoće, intenziteta obojenja i električne provodnosti uz završnu pH vrijednost blizu neutralnoj. Kao uzorak se koristila otpadna voda tekstilne tvrtke Galeb d.d. iz Omiša (Hrvatska). Koagulacija je provedena JAR – testom i parametri od interesa (mutnoća, električna provodnost, intenzitet obojenja, pH nakon koagulacije, ukupni ugljik, anorganski ugljik i TOC) obrađeni su metodom odzivnih površina. Rezultati su pokazali kako je optimalna vrijednost pH 5,83 i koncentracija željezova(III) klorida 11,88 mM čime je postignuta vrijednost TOC – a od 242,5 mg L^-1, mutnoća vode 74,1 NTU, električna provodnost od 4,7261 mS cm^-1, pH nakon koagulacije 5,27 i intenziteta obojenja od 8,01.

Abstract (english)

The complex composition and toxicity of wastewater generated in the textile industry is a major challenge in its treatment. One of the procedures applied is chemical coagulation whose optimization plays a significant role in its efficiency. The aim of this work is to find a combination of optimal pH conditions and concentration of iron(III) chloride coagulant for efficient removal of total organic carbon (TOC), reduction of turbidity, color intensity and electrical conductivity with a final pH value close to neutral. Wastewater from the textile company Galeb d.d. from Omiš (Croatia) is used as a sample. Coagulation was performed by JAR - test and parameters of interest (turbidity, electrical conductivity, colour intensity, pH after coagulation, total carbon, inorganic carbon, and TOC) were processed by the response surface method. The results showed that the optimal pH value was 5.83 and the concentration of iron(III) chloride 11.88 mM, which achieves a TOC value of 242.5 mg L^-1, water turbidity 74.1 NTU, electrical conductivity of 4.7261 mS cm^-1, pH after coagulation 5.27, and color intensity 8.01.

• Keywords: koagulacija; optimizacija; JAR – test; mutnoća; TOC
• Keywords (english): coagulation; optimization; JAR - test; turbidity; TOC
• Language: croatian
• URN:NBN: urn:nbn:hr:149:846322
• Study programme: Title: Applied Chemistry - Undergraduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry; Course: Applied organic chemistry; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2023-05-03 09:49:00