Utjecaj fizičko-kemijskih čimbenika na organizme u aktivnom mulju uređaja za pročišćavanje otpadnih voda

undergraduate thesis

• Title (english): Influence of physical and chemical factors on organisms in activated sludge wastewater treatment
• Author: Ana Ptiček
• Mentor: Maria Špoljar (mentor)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2011, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Razvojem društva i tehnologije postavljaju se sve veći zahtjevi za zaštitu okoliša a posebno za pročišćavanje otpadnih voda. Najrašireniji biološki postupak uklanjanja organskih tvari iz otpadne vode je korištenje aktivnog mulja. Aktivni mulj nastaje međusobnim povezivanjem bakterija, Protozoa, Metazoa i suspendiranih čestica organske tvari u nakupine koje nazivamo flokule. Uloga organizama u aktivnom mulju je da u svoju biomasu ugrađuju organske tvari iz otpadne vode te kao produkt nastaju plinovi i nerazgradivi ostatak. Organizmi koji najviše sudjeluju u biološkom pročišćavanju voda su bakterije, trepetljikaši, bičaši, amebe te kolnjaci. Protozoa i Metazoa koriste bakterije i organske čestice kao hranu. Njihova brojnost i raznolikost ukazuje na kvalitetu aktivnog mulja i uspješnost pročišćavanja otpadnih voda. Biološka aktivnost mikroorganizama ovisi o temperaturi, koncentraciji otopljenog kisika, pH vrijednosti, vrsti i koncentraciji sastojaka u vodi. Optimalna pH vrijednost za aktivnost mikroorganizama je 7.5-8.0 a optimum temperaturnih uvjeta nalazi se između 25°C - 35°C. Toksične tvari koje se nalaze u aktivnom mulju npr. teški metali (bakar,cink) najčešće uzrokuju gubitak aktivnosti mikroorganizama i njihovo ugibanje.

Abstract (english)

Parellel with technological development increas demands for environmental and water protection. The most common wastewate treatment is the biological activated sludge process. The activated sludge generated bacteria, protozoa, metazoa and suspended particles in flocs. The role of organisms in activated sludge is to incorporated dissolved substances from wastewater into their biomass and as a product result in gases and insoluble particles. Bacteria, cilliates, flagellates, and rotifers are organisms that are most involved in the biological wastewater treatment. Protozoa and Metazoa are using bacteria and organic particles as food. Their abundance and variety is measure for quality and effectiveness of activated sludge wastewater treatment Biological activity of microorganisms depends on temperature, amount of dissolved oxygen, pH, quality and quantity of ingredients in the water. The optimum pH for the activity of microorganisms is 7.5-8.0 and the optimum temperature conditions are between 25 ° C - 35 ° C. Toxic substances found in activated sludge are heavy metals (copper, zinc) and they cause loss of microorganisms activity and death.

• Keywords: pročišćavanje otpadnih voda; aktivni mulj
• Keywords (english): wastewater treatment; activated sludge
• Language: croatian
• URN:NBN: urn:nbn:hr:217:753214
• Study programme: Title: Environmental Sciences; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) struke znanosti o okolišu (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) struke znanosti o okolišu)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2018-04-10 10:34:26