Fluorescence in situ hybridization analysis of nitrifiers in piggery wastewater treatment reactors.
Water Sci Technol
; 49(5-6): 333-40, 2004.
Article
in En
| MEDLINE
| ID: mdl-15137442
ABSTRACT
Fluorescence in situ hybridization (FISH) was performed to analyze the nitrifying microbial communities in an activated sludge reactor (ASR) and a fixed biofilm reactor (FBR) for piggery wastewater treatment. Heterotrophic oxidation and nitrification were occurring simultaneously in the ASR and the COD and nitrification efficiencies depend on the loads. In the FBR nitrification efficiency also depends on ammonium load to the reactor and nitrite was accumulated when free ammonia concentration was higher than 0.2 mg NH3-N/L. FISH analysis showed that ammonia-oxidizing bacteria (NSO1225) and denitrifying bacteria (RRP1088) were less abundant than other bacteria (EUB338) in ASR. Further analysis on nitrifying bacteria in the FBR showed that Nitrosomonas species (NSM156) and Nitrospira species (NSR1156) were the dominant ammonia-oxidizing and nitrite-oxidizing bacteria, respectively, in the piggery wastewater nitrification system.
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Collection:
01-internacional
Health context:
2_ODS3
Database:
MEDLINE
Main subject:
Sewage
/
DNA, Bacterial
/
Waste Disposal, Fluid
/
Bioreactors
/
Nitrogen
Limits:
Animals
Language:
En
Journal:
Water Sci Technol
Year:
2004
Document type:
Article