Metabolic profiles and genetic diversity of denitrifying communities in activated sludge after addition of methanol or ethanol.

ABSTRACT: External carbon sources can enhance denitrification rates and thus improve nitrogen removal in wastewater treatment plants. The effects of adding methanol and ethanol on the genetic and metabolic diversity of denitrifying communities in activated sludge were compared using a pilot-scale plant with two parallel lines. A full-scale plant receiving the same municipal wastewater, but without external carbon source addition, was the reference. Metabolic profiles obtained from potential denitrification rates with 10 electron donors showed that the denitrifying communities altered their preferences for certain compounds after supplementation with methanol or ethanol and that methanol had the greater impact. Clone libraries of nirK and nirS genes, encoding the two different nitrite reductases in d

SUBMITTER: Hallin S 

PROVIDER: S-EPMC1538702 | biostudies-literature | 2006 Aug

REPOSITORIES: biostudies-literature