Naslov
Municipal Wastewater Treatment in a Membrane Bioreactor

Autori
Matošić, Marin ; Crnek, Vlado ; Korajlija Jakopović, Helena ; Mijatović, Ivan

Izvornik
Fresenius environmental bulletin (1018-4619) 18 (2009), 12; 2275-2281

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
membrane bioreactor ; municipal wastewater ; submerged membrane

Sažetak
A membrane bioreactor (MBR) with a submerged membrane was used for the treatment of municipal wastewater from the city of Zagreb, Croatia in a continuous mode for 123 days. The MBR was very efficient in organic matter removal (92.3 and 98.5 % for COD and BOD, respectively) for the entire duration of the experiment. Nitrification was established after 20 days and remained stable and efficient with a low concentration of ammonia and nitrite in the effluent. On average, 87% of ammonia was converted to nitrate. Biomass concentration, measured as MLSS, was dependant on the organic loading rate (OLR) and food to microorganism ratio (F/M) and its growth could be stopped or its concentration reduced by setting OLR and F/M to appropriate values, thus reducing the excess sludge production. Throughout the range of hydraulic retention times from 2.6 to 5.9 h, the efficiencies of organic matter removal and nitrification were not affected.

Izvorni jezik
Engleski

Znanstvena područja
Biotehnologija

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