Factors affecting population of filamentous bacteria in wastewater treatment plants with nutrients removal

Aleksandra Miłobędzka , Anna Witeska , Adam Muszyński

Abstract

Filamentous population in activated sludge and key operational parameters of full-scale municipal wastewater treatment plants (WWTPs) with bulking problems representative for Poland were investigated with quantitative fluorescence in situ hybridization. Statistical analyses revealed few relationships between operational parameters and biovolume of filamentous bacteria. Sludge age was not only positively correlated with abundance of Chloroflexi (parametric correlation and principal component analysis (PCA)), but also differentiated Microthrix population (analysis of variance (ANOVA)). Phylum Chloroflexi and pH presented a negative relation during the study (PCA). ANOVA showed that pH of influent and sludge volume index (SVI) differentiated abundance of types 0803 and 1851 of Chloroflexi and candidate division TM7. SVI increased along with higher abundance of Microthrix (positive parametric and non-parametric correlations and positive relation in PCA). Biovolumes of morphotypes 0803 and 1851 of Chloroflexi were differentiated by organic matter in influent, also by nutrients in the case of Chloroflexi type 1851. Chemical and biological oxygen demands (COD and BOD5, respectively) were negatively correlated with Microthrix. COD also differentiated the abundance of Haliscomenobacter hydrossis. Results of the study can be used to prevent WWTPs from excessive proliferation of filamentous bacteria and operational problems caused by them – bulking and foaming of activated sludge.
Author Aleksandra Miłobędzka ZB
Aleksandra Miłobędzka,,
- Department of Biology
, Anna Witeska ZIBJŚ
Anna Witeska,,
- Department of Informationa Science and Environment Quality Research
, Adam Muszyński ZB
Adam Muszyński,,
- Department of Biology
Journal seriesWater Science and Technology, ISSN 0273-1223
Issue year2016
Vol73
No4
Pages790-797
Publication size in sheets0.5
Keywords in Englishfilamentous bacteria, wastewater treatment plants, nutrients removal
DOIDOI:10.2166/wst.2015.541
URL http://wst.iwaponline.com/content/73/4/790
Languageen angielski
Score (nominal)20
ScoreMinisterial score = 20.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 20.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 1.197 (2) - 2016=1.297 (5)
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