Naslov
Removal of phosphate and heavy metals from wastewater by bacteria immobilized on natural zeolitic tuff

Autori
Nuskern, Lucija ; 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, 1-1

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
Acinetobacter junii ; Pseudomonas aeruginosa ; bioparticles

Sažetak
To test new methods of activated sludge bioaugmentation we immobilised Acinetobacter junii and Pseudomonas aeruginosa onto natural zeolitic tuff and tested their ability to remove phosphates and heavy metals (copper, zinc, nickel) from synthetic and real wastewater. A. junii strain used is a known phosphate (P)-accumulating bacterium and P. aeruginosa strain was isolated from metalworking fluids. We immobilized the bacteria (bioparticle formation) by aerobically incubating pure bacterial cultures and zeolitic tuff in nutrient medium, obtaining A. junii bioparticles (AJBP) and P. aeruginosa bioparticles (PABP). We conducted four sets of experiments in order to: i) compare heavy metal tolerance of planktonic and immobilized bacteria, ii) compare their ability to remove phosphates and heavy metals from synthetic wastewater, iii) investigate if combined system with AJBP and PABP can be as efficient as systems with only AJBP or PABP, iv) test the ability of combined AJBP and PABP to remove phosphates and metals from real wastewater. Immobilised bacteria were significantly more tolerant to heavy metal stress than planktonic bacteria and removed significantly more metals. The two bacteria in form of bioparticles can survive in the same system, multiply and remove phosphates and heavy metals more successfully than when used separately. By simultaneous use of both bioparticles in real wastewater achieved values of phosphate and metal removal were from 15.2 to 17.0 mg/L P-PO4, 1.1 to 11.4 mg/L Cu2+, 1.2 to 32.8 mg/L Zn2+ and 1.0 to 39.6 mg/L Ni2+. This high efficiency gives the opportunity to use these bioparticles in wastewater treatment plants.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA