Naslov
Comparative pilot plant studies for biological nitrogen removal

Autori
Burica, Olga ; Stražar, Marjeta ; Glancer-Šoljan, Margareta ; Šoljan, Vice

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
1st International Conference on Environmental restoration / Roš, Milenko - Ljubljana : LaserPrint, d.o.o., Ljubljana, 1997, 384-391

Skup
1st International Conference on Environmental restoration

Mjesto i datum
Ljubljana, Slovenija, 06.07.1997. - 09.07.1997

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Wastewater; Pilot experiments; Nitrogen removal; Nitrification; Denitrification; Predenitrification; MBBR; Bioaugmentation
(wastewater; pilot experiments; nitrogen removal; nitrification; denitrification; predenitrification; MBBR; bioaugmentation)

Sažetak
A comaparative study of three different technologies for nitrification and denitrification is presented based on three year pilot plant experiments, the first involving the convnetional predenitrification system, the second using a fixed biofilm biomass on moving carriers and the third using a mixed culture capable of simultaneous nitrification and denitrification at the heterotrophic level. The conventional predenitrification process at a hydraulic retention time of 7 hours in sommer time and 12 hours in winter time gave the results for total nitrogen elimination of 57 % and 53 %, respectively, with NH_4-N reduction of 56 % and 84 %. The results show that fixed biofilm system consisting of two anoxic and two oxic stages with a predenitrification configuration and a hydraulic retention time of 5 hours at sommer temperature and 12 hours in winter time is capable of total nitrogen elimination of 42 % and 58 %, respectively, with the reduction of NH_4-N around 75 % and 94 %. The simultaneous process of augmentation using specialized mixed culture at hydraulic retention time of 5 hours in sommer and winter time gave the results for total nitrogen elimination 49 % with the NH_4-N reduction of 79 %.

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

POVEZANOST RADA