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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Aerobic denitrification by a heterotrophic nitrifying-aerobic denitrifying (HN-AD) culture enriched activated sludge
Abstract Heterotrophic nitrifying bacteria capable of denitrification under aerobic conditions, which are known as HN-AD species, were investigated. Instead of the isolation and subsequent cultivation of a pure HN-AD strain, the activated sludge obtained from the domestic wastewater treatment plant was enriched to enhance the fraction and activity of the indigenous HN-AD species by adding ammonium and organic carbon. The enriched culture showed both rapid ammonium removal at a rate of 13.3 mg-N/L/hr and nitrate removal at a rate of 12.3 mg-N/L/hr, which was higher than those for the pure HN-AD bacteria reported in the literature. On the contrary, the activated sludge that was not enriched showed insignificant nitrification and aerobic denitrification. These results implied that the selective enrichment procedure improved the fraction and/or activity of the HN-AD culture in the mixed biomass. Consequently, the enriched HN-AD culture from activated sludge could be a feasible alternative over the conventional BNR process.
Aerobic denitrification by a heterotrophic nitrifying-aerobic denitrifying (HN-AD) culture enriched activated sludge
Abstract Heterotrophic nitrifying bacteria capable of denitrification under aerobic conditions, which are known as HN-AD species, were investigated. Instead of the isolation and subsequent cultivation of a pure HN-AD strain, the activated sludge obtained from the domestic wastewater treatment plant was enriched to enhance the fraction and activity of the indigenous HN-AD species by adding ammonium and organic carbon. The enriched culture showed both rapid ammonium removal at a rate of 13.3 mg-N/L/hr and nitrate removal at a rate of 12.3 mg-N/L/hr, which was higher than those for the pure HN-AD bacteria reported in the literature. On the contrary, the activated sludge that was not enriched showed insignificant nitrification and aerobic denitrification. These results implied that the selective enrichment procedure improved the fraction and/or activity of the HN-AD culture in the mixed biomass. Consequently, the enriched HN-AD culture from activated sludge could be a feasible alternative over the conventional BNR process.
Aerobic denitrification by a heterotrophic nitrifying-aerobic denitrifying (HN-AD) culture enriched activated sludge
Choi, Kyoung-Jin (Autor:in) / Zhang, Shan (Autor:in) / Song, Ji Hyeon (Autor:in) / Hwang, Sun-Jin (Autor:in)
KSCE Journal of Civil Engineering ; 21 ; 2113-2118
30.12.2016
6 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Culture and Enrichment of Denitrifying Phosphorus Removing Sludge and Nitrifying Activated Sludge
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