Characterization of denitrifying granular sludge with and without the addition of external carbon source

Beni Lew, Peter Stief, Michael Beliavski, Aviad Ashkenazi, Olivera Svitlica, Abid Khan, Sheldon Tarre, Dirk de Beer, Michal Green

פרסום מחקרי: פרסום בכתב עתמאמרביקורת עמיתים

41 ציטוטים ‏(Scopus)

תקציר

In this study granular sludge taken from a denitrifying upflow sludge reactor was characterized. Denitrification rates were determined in batch tests with and without external carbon source addition and pH microprofiles of the granules were studied. The microbial community structure was also determined. The results showed that denitrification without carbon source addition occurs; however, the process rate was lower than with external carbon source. This suggests that bacteria use dead biomass and extracellular material in the granular sludge as a carbon source when readily available substrate has been exhausted and nitrate is still present. Microprofiles showed a slight pH decrease for denitrification without external carbon source addition, and an increase in pH when using nitrite as the electron acceptor. Microprofiles using acetate as the carbon source for denitrification showed a significant increase in pH. Clone sequences obtained were close to the species Vitellibacter sp., Denitromonas indolicum str. and Denitromonas aromaticaus sp.

שפה מקוריתאנגלית
עמודים (מ-עד)413-420
מספר עמודים8
כתב עתBioresource Technology
כרך124
מזהי עצם דיגיטלי (DOIs)
סטטוס פרסוםפורסם - נוב׳ 2012

טביעת אצבע

להלן מוצגים תחומי המחקר של הפרסום 'Characterization of denitrifying granular sludge with and without the addition of external carbon source'. יחד הם יוצרים טביעת אצבע ייחודית.

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