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Bacterial structure of biofilms in wastewater infiltration systems

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Title: Bacterial structure of biofilms in wastewater infiltration systems
Authors: Stenberg, B., Pell, M., Hallin, S.
Source: Water Science & Technology. 1998, Vol. 37 Issue 4/5, p203. 0p.
Subjects: Bacteria, Principal components analysis, Wastewater treatment
Abstract: The objective of the present study was to use a test system for clustering and characterizing the bacterial populations in five wastewater infiltration systems ranging in size from 12. m2 to 1960m2 (corresponding to the demand for 4--500 population equivalents). From each system two sand samples were taken and from eachsample 89 bacterial isolates were collected, Every isolate was exposed to 52 physiological and biochemical tests. The resulting 880 objects x 52 variable data matrix was subjected to principal components analysis (PCA). After a variable reduction the PCA model revealed a scattered bacteria pattern (score plot) in parts of the sand filters expected to have high loading rates of wastewater, e.g. at the inlet of the filters. This indicates that a diverse bacterial population had developed in response to the carbon and energy source in the wastewater. In contrast to this pattern a more narrow bacteria pattern had developed in low loaded parts of the sand filter. The most important variables explaining the structure of the microbial biofilm at high wastewater load were the ability to ferment sugars and the capacity to sustain different pH levels. The potential to ammonify and grow on nutrient broth was also an important feature. In conclusion, the bacterial test system together with PCA seems to be a useful tool to evaluatethe function of a bacterial sand-filter ecosystem. (c) 1998 IAWQ. Published by Elsevier Science Ltd. [ABSTRACT FROM AUTHOR]
Copyright of Water Science & Technology is the property of IWA Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
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PubType: Academic Journal
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  Data: Bacterial structure of biofilms in wastewater infiltration systems
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  Data: <searchLink fieldCode="AR" term="%22Stenberg%2C+B%2E%22">Stenberg, B.</searchLink><br /><searchLink fieldCode="AR" term="%22Pell%2C+M%2E%22">Pell, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Hallin%2C+S%2E%22">Hallin, S.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Water+Science+%26+Technology%22">Water Science & Technology</searchLink>. 1998, Vol. 37 Issue 4/5, p203. 0p.
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  Data: <searchLink fieldCode="DE" term="%22Bacteria%22">Bacteria</searchLink><br /><searchLink fieldCode="DE" term="%22Principal+components+analysis%22">Principal components analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Wastewater+treatment%22">Wastewater treatment</searchLink>
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  Label: Abstract
  Group: Ab
  Data: The objective of the present study was to use a test system for clustering and characterizing the bacterial populations in five wastewater infiltration systems ranging in size from 12. m2 to 1960m2 (corresponding to the demand for 4--500 population equivalents). From each system two sand samples were taken and from eachsample 89 bacterial isolates were collected, Every isolate was exposed to 52 physiological and biochemical tests. The resulting 880 objects x 52 variable data matrix was subjected to principal components analysis (PCA). After a variable reduction the PCA model revealed a scattered bacteria pattern (score plot) in parts of the sand filters expected to have high loading rates of wastewater, e.g. at the inlet of the filters. This indicates that a diverse bacterial population had developed in response to the carbon and energy source in the wastewater. In contrast to this pattern a more narrow bacteria pattern had developed in low loaded parts of the sand filter. The most important variables explaining the structure of the microbial biofilm at high wastewater load were the ability to ferment sugars and the capacity to sustain different pH levels. The potential to ammonify and grow on nutrient broth was also an important feature. In conclusion, the bacterial test system together with PCA seems to be a useful tool to evaluatethe function of a bacterial sand-filter ecosystem. (c) 1998 IAWQ. Published by Elsevier Science Ltd. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Water Science & Technology is the property of IWA Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/S0273-1223(98)00106-1
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        Text: English
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        Type: general
      – SubjectFull: Principal components analysis
        Type: general
      – SubjectFull: Wastewater treatment
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      – TitleFull: Bacterial structure of biofilms in wastewater infiltration systems
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            NameFull: Pell, M.
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              Text: 1998
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              Value: 37
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