Uloga mikrofaune u procjeni kvalitete aktivnog mulja

undergraduate thesis

• Title (english): Microfauna role in assessing the quality of activated sludge
• Author: Maja Duić Sertić
• Mentor: Maria Špoljar (mentor)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2012, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Razvojem tehnologije i društva povećava se i potreba za pročišćavanjem otpadnih voda. Iako je pročišćavanje, zbog očuvanja vodenih resursa, neophodno, radi se o vrlo skupom postupku, pa je samim time njegova primjena vrlo mala. Aktivni mulj je flokularna tvorevina koja se sastoji od bakterija, protozoa, metazoa i suspendiranih čestica organske tvari. U biološkom pročiščavanju voda najveću ulogu imaju bakterije zatim protozoa i metazoa. Uloga tih organizama očituje se u postupku pročišćavanja vode, u kojem u svoju biomasu ugrađuju organske tvari iz otpadne vode i stvaraju kao produkt plinove i nerazgradivi ostatak. Utvrđeno je da amebe prevladavaju prilikom pokretanja sustava, dok je prisutnost bičaša uz amebe znak toksičnog preopterećenja sustava. Prisutnost slobodno plivajućih trepetljikaša je indikator dobrog operativnog sustava. Pričvršćeni trepetljikaši su dobri bioindikatori toksičnosti jer prelaze u slobodno plivajuće oblike kada su izloženi nepovoljnim uvjetima. Kolnjaci su znak stabilnog aktivnog mulja i nalazimo ih tijekom povoljnih uvjeta. Svaka od ovih vrsta govori o različitoj vrsti opterećenja sustava za pročišćavanje otpadnih voda. S obzirom da biološka aktivnost mikroorganizama ovisi o nizu parametara (temperatura, pH, koncentracija otopljenog kisika, vrsti i koncentraciji otopljenih tvari) izvrsni su indikatori kvalitete aktivnog mulja, jer njihova brojnost i raznolikost govori i o sposobnosti pročišćavanja otpadnih voda aktivnim muljem.

Abstract (english)

Development of technology and society is increasing the need for wastewater treatment. Although the treatment plant it is necessary in order to preserve water resources, but it is a very expensive procedure, and therefore its use is very small. The activated sludge is follicular construction consisting of bacteria, protozoa, metazoa, and suspended particles of organic matter. The biological treatment of water have the greatest role of bacteria and protozoa then metazoa. The role of these organisms is reflected in the water purification process, which in its biomass incorporated organic matter from wastewater and produce a product gas and not degradable rest. It was found that the amoebae predominate at system startup, while the presence of flagellates to amoebae is a sign of toxic overload the system. The presence of free-floating ciliates is a good indicator of the operating system. Attached ciliates are good bio-indicators of toxicity in crossing the free-swimming forms when exposed to such conditions. Brachionus are a sign of a stable activated sludge and found them during favorable conditions. Each of these types of talks on different kind of loading system for wastewater treatment. Given that the biological activity of microorganisms depends on a number of parameters (temperature, pH, concentration of dissolved oxygen, the type and concentration of dissolved substances in the water) are excellent indicators of the quality of sludge, because of their abundance and diversity of talking about the quality and capacity of activated sludge wastewater treatment.

• Keywords: aktivni mulj; mikrofauna; pročišćavanje otpadnih voda
• Keywords (english): activated sludge; microfauna; wastewater treatment
• Language: croatian
• URN:NBN: urn:nbn:hr:217:860144
• 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: 2018-04-16 08:50:45