Naslov
Commercial materials as carriers of phosphate-accumulating bacteria

Autori
Ivanković, Tomislav ; Hrenović, Jasna

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
FEMS 2013 / Harms, Hauke - Leipzig : Federation of European Materials Societies (FEMS), 2013

Skup
FEMS 2013, 5th Congress of European Microbiologist

Mjesto i datum
Leipzig, Njemačka, 21.07.2013. - 25.07.2013

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
carbon fibers; CultiSpher-S microcarrier; Acinetobacter junii

Sažetak
Two commercially available materials, MiraCarbon® carbon fibers (CF) and CultiSpher-S® microcarrier (CS), were used as support materials for immobilization of phosphate (P)-accumulating bacterium Acinetobacter junii. The CF are filamentous microscopic fibers intended to be used for mass adhesion of activated sludge thus preventing excess of waste sludge. The CS are macroporous gelatin spheres intended to be used as support for growth of animal cells. The immobilization of A. junii was performed by aerobically incubating the pure bacterial culture and selected materials in simulative wastewater with low P concentrations (2 mg L-1) for 24 h. After the incubation the numbers of immobilized bacteria were 1.97±0.95×109 CFU g-1 of CF and 4.96±1.0×109 CFU g-1 of CS. The materials with immobilized bacteria were now transferred to simulative wastewater with high P concentrations (20 mg L-1) to test the P-removing capacity of such prepared substrate. During 24 h of aerobic incubation a part of the cells were detaching from the surface of the CF thus bioaugmenting the surrounding media while majority of the bacteria remained firmly in the biofilm ; the bacteria were metabolically active and removed 50% of starting P from the wastewater. On the other hand, the CS dissolved after 24 h of incubation resulting in blur and gelatinous solution which excluded CS for potential usage in the treatment systems, although the bacteria were still viable and metabolically active. The CF were rigid throughout the experiment, showed great potential for implementation and should further be tested in activated sludge systems.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA