Čimbenici formiranja i stabilnosti aerobnog granuliranog mulja u obradi otpadnih voda

undergraduate thesis

• Title (english): Parameters of forming and stability of aerobic granular sludge in wastewater treatment
• Author: Dora Šagud
• Mentor: Tibela Landeka Dragičević (mentor)
• Granter: University of Zagreb; Faculty of Food Technology and Biotechnology; (Department of Food Engineering); (Laboratory for the Biological Waste Water Treatment); Zagreb
• Defense date and country: 2021-07-15, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Food Technology

Abstract

Granulirani mulj je samoimobilizirano mikrobno udruženje koje se primjenjuje u obradi otpadnih voda. Aerobne granule su sfernog ili eliptičnog oblika prosječne veličine promjera izmeĎu 0,2 i 9,0 mm. Karakterizira ih izvrsna taloživost i veliko zadržavanje biomase. Izvanstanične polimerne tvari pridonose strukturnoj stabilnosti aerobnih granula. To su organske makromolekule koje luče mikroorganizmi i tvore trodimenzionalnu matricu u koju se bakterije mogu ugraditi. Aerobni granulirani mulj omogućuje istovremenu nitrifikaciju, denitrifikaciju i uklanjanje fosfora u jednom reaktoru. Istraživanja primjene aerobnog granuliranog mulja provode se u sekvecnijalnom šaržnom reaktoru (SBR, engl. Sequencing Batch Reactor). Na formiranje i stabilnost aerobnih granula utječe brzina strujanja zraka, trajanje perioda gladovanja, temperatura, duljina vremena skladištenja, značajke mulja, metali, otopljeni kisik, organsko opterećenje, sastav otpadnih voda i drugi čimbenici. Aerobni granulirani mulj izvrsna je alternativa aktivnom mulju.

Abstract (english)

Granulated sludge is a self-immobilized microbial association used in wastewater treatment. Aerobic granules are spherical or elliptical with an average size diameter between 0.2 and 9.0 mm. They are characterized by excellent settling properties and high biomass retention. Extracellular polymeric substances contribute to the structural stability of aerobic granules. These are organic macromolecules secreted by microorganisms and form a three-dimensional matrix into which bacteria can be incorporated. Aerobic granular sludge enables simultaneous nitrification, denitrification and phosphorus removal in one reactor. Investigations of the application of aerobic granular sludge are carried out in a sequencing batch reactor (SBR). The formation and stability of aerobic granules are influenced by air flow rate, duration of starvation period, temperature, length of storage time, characteristics of sludge, metals, dissolved oxygen, organic load, wastewater composition and other factors. Aerobic granular sludge is an excellent alternative to activated sludge.

• Keywords: aerobne granule; SBR; stabilnost
• Keywords (english): aerobic granules; sequenced batch reactor (SBR); stability
• Language: croatian
• URN:NBN: urn:nbn:hr:159:067164
• Study programme: Title: Food Technology; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka prehrambene tehnologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka prehrambene tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2021-07-19 10:09:21