Abstract:
:In this study, the abundance and sequences of amoA genes of ammonia-oxidizing archaea (AOA) and bacteria (AOB) were determined in seven wastewater treatment plants (WWTPs) whose ammonium concentrations in influent and effluent wastewaters varied considerably (5.6-422.3 mgN l(-1) and 0.2-29.2 mgN l(-1), respectively). Quantitative real-time PCR showed that the comparative abundance of AOA and AOB amoA genes differed among the WWTPs. In all three industrial WWTPs, where the influent and effluent contained the higher levels of ammonium (36.1-422.3 mgN l(-1) and 5.3-29.2 mgN l(-1), respectively), more than four orders of magnitude higher numbers of AOB amoA genes than AOA amoA genes arose (with less than the limit of detection of AOA amoA genes). In contrast, significant numbers of AOA amoA genes occurred in all municipal WWTPs (with ammonium levels in the influent and effluent of 5.6-11.0 mgN l(-1) and 0.2-3.0 mgN l(-1), respectively). Statistical analysis suggested that compared to other plants' parameters, the ammonium levels in the plants' effluent showed correlation with the highest p value to the abundance of AOA amoA genes.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Limpiyakorn T,Sonthiphand P,Rongsayamanont C,Polprasert Cdoi
10.1016/j.biortech.2010.11.085subject
Has Abstractpub_date
2011-02-01 00:00:00pages
3694-701issue
4eissn
0960-8524issn
1873-2976pii
S0960-8524(10)01888-2journal_volume
102pub_type
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