A key is presented which enables the identification of most filamentous micro-organisms occurring in activated sludge plants fed with mainly domestic wastewater. The key is based upon features that can be observed by conventional phase contrast and bright field microscopy. On applying this key, you have to choose between two or three images at each step. Select the image which resembles best the features of the filament observed in your microscope. Eleven characteristics of filamentous species are used in the key. Click here for a full list of these characteristics and their description.


You are referred to the "Process Control" multimedia package (CD-ROM + Manual) for more information about subjects, such as controlling filamentous growth, operational problems caused by foam and scum, floc morphology, protozoa, etc.

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