Raspodjela vremena zadržavanja u membranskom bioreaktoru ovisno o koncentraciji aktivnog mulja

master's thesis

• Title (english): Residence time distribution in a membrane bioreactor dependance on activated sludge
• Author: Jelena Ranić
• Mentor: Želimir Kurtanjek (mentor)
• Granter: University of Zagreb; Faculty of Food Technology and Biotechnology; (Department of Process Engineering); (Laboratory for Measurement, Regulation and Automatisation); Zagreb
• Defense date and country: 2008-03-07, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Biotechnology

Abstract

U ovom radu istraživani su hidrodinamički uvjeti u membranskom bioreaktoru s uronjenom membranom. Određivanje učinaka hidrodinamike reaktora temelji se na eksperimentalnom određivanju raspodjele vremena zadržavanja tvari u reaktoru. Bioreaktor je bio ispunjen suspenzijom aktivnog mulja različitih koncentracija. Eksperimenti su provedeni injektiranjem inertne tvari s vrha bioreaktora te je praćena promjena vodljivosti na izlazu bioreaktora kao funkcija vremena. Određivan je utjecaj koncentracije biomase aktivnog mulja, protoka kapljevine i protoka zraka na raspodjelu vremena zadržavanja tvari. Dobivene vrijednosti RTD-a za realni reaktor uspoređivane su s modelom idealnog reaktora. Uočena su velika odstupanja. Glavni problem membranskog bioreaktora je čepljenje membrane pa je uz određivanje RTD-a praćena promjena transmembranskog tlaka u ovisnosti o vremenu. Time je određen utjecaj koncentracije biomase aktivnog mulja, protoka kapljevine i stupnja aeracije na čepljenje membrane.

Abstract (english)

This paper deals with hydrodynamic characteristics of a submerged membrane bioreactor. Analysis of hidrodynamic effects in bioreactor are presented as residence time distributions. Bioreactor was filled with different concentrations of activated sludge. Experiments were conducted by injection of an inert into bioreactor and electrical conductivity at exit of the bioreactor was measured as a function of time. Effects of concentration of suspended active sludge as well as liquid and gas flowrates on residence time distribution were monitored. The results were compared with the model of an ideal membrane reactor. Depending on concentration level high variations have been noticed. The main problem in bioreactor was membrane fouling. Because of that increase trans-membrane pressure was mesured during the time. Membrane fouling was heavily influenced by concentration of suspended active sludge, aeration rate and the permeate flux.

• Keywords: aktivni mulj; čepljenje membrane; membranski bioreaktor; raspodjela vremena zadržavanja
• Keywords (english): active sludge; membrane bioreactor; membrane fouling; residence time distribution
• Language: croatian
• URN:NBN: urn:nbn:hr:159:728906
• Study programme: Title: Biotechnology; specializations in: Biochemical Engineering; Course: Biochemical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: diplomirani inženjer biotehnologije; smjer biokemijsko inženjerstvo (diplomirani inženjer biotehnologije; smjer biokemijsko inženjerstvo)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2017-09-04 13:36:43