In situ microscopy as a tool for the monitoring of filamentous bacteria: a case study in an industrial activated sludge system dominated by M. parvicella.

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ID: 21047
2016
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Ranked #25 of 69 articles by views in water science and technology : a journal of the international association on water pollution research

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Abstract
The present study demonstrates the application of in situ microscopy for monitoring the growth of filamentous bacteria which can induce disturbances in an industrial activated sludge process. An in situ microscope (ISM) is immersed directly into samples of activated sludge with Microthrix parvicella as dominating species. Without needing further preparatory steps, the automatic evaluation of the ISM-images generates two signals: the number of individual filaments per image (ISM-filament counting) and the total extended filament length (TEFL) per image (ISM-online TEFL). In this first version of the image-processing algorithm, closely spaced crossing filament-segments or filaments within bulk material are not detected. The signals show highly linear correlation both with the standard filament index and the TEFL. Correlations were further substantiated by comparison with real-time polymerase chain reaction (real-time PCR) measurements of M. parvicella and of the diluted sludge volume index. In this case study, in situ microscopy proved to be a suitable tool for straightforward online-monitoring of filamentous bacteria in activated sludge systems. With future adaptation of the system to different filament morphologies, including cross-linking filaments, bundles, and attached growth, the system will be applicable to other wastewater treatment plants.
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dunkel2016inwater Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Dunkel, Thiemo;Dias, Philipe Ambrozio;de León Gallegos, Erika Lizette;Tacke, Viola;Schielke, Andreas;Hesse, Tobias;Fajado, Diego Andrés Sierra;Suhr, Hajo;Wiedemann, Philipp;Denecke, Martin;
Journal water science and technology : a journal of the international association on water pollution research
Year 2016
DOI
10.2166/wst.2015.612
URL
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