Simultaneous Nitrification and Denitrification in Micro-Aerobic Biofilms

Autor:	Masayoshi Ishiguro, Y. Watanabe, S. Masuda
Rok vydání:	1992
Předmět:	Environmental Engineering Denitrification Environmental engineering Biofilm chemistry.chemical_element Rotating biological contactor Simultaneous nitrification-denitrification Nitrogen removal Oxygen Chemical engineering chemistry Phase (matter) Nitrification Water Science and Technology
Zdroj:	Water Science and Technology. 26:511-522
ISSN:	1996-9732 0273-1223
DOI:	10.2166/wst.1992.0431
Popis:	Simultaneous nitrification and denitrification (SND) occurs in a micro-aerobic biofilm. Using a partially submerged rotating biological contactor(RBC) whose air phase oxygen partial-pressure is controllable, an experimental investigation was made into the effects of the oxygen flux to the biofilm on the SND. The lower the oxygen flux the lower the nitrification efficiency and the higher the denitrification efficiency until the maximum nitrogen removal efficiency was obtained. The state was reached at an oxygen partial-pressure of about 0.1 atm. (oxygen flux= 0.35 g/m2/hour) in this study. Computer simulation of the SND was carried out based on the biofilm kinetic model proposed by the authors. There was adequate agreement between the experimental and simulation results. The simulation study demonstrated that the nitrification and denitrification occur mainly in the biofilm rotating through the air and water phase, respectively, and that the optimum disk rotating speed is around 3 rpm.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3dc2d1ae6a34e1a96a08669401c3f99c https://doi.org/10.2166/wst.1992.0431 Zobrazit plný text záznamu