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These are phase contrast microscopy photographs of organisms involved in the biological treatment of wastewater.
Phase contrast is preferable to bright field microscopy when high magnifications (400x, 1000x) are needed or the specimen is colorless or the details so fine that color does not show up well. Cilia and flagella, for example, are nearly invisible in bright field but show up in sharp contrast in phase contrast. Amoebae look like vague outlines in bright field, but show a great deal of detail in phase. Most living microscopic organisms are much more obvious in phase contrast.
It is the excess cellular mass of these organisms produced during the treatment of wastewater that makes up the "bio" of biosolids.
Photographs provided courtesy of the late Ronald Corner, Former Laboratory Manager, City of Cadillac Wastewater Treatment Plant.
Stalked Ciliate Zoothamnium 10X
Algae 40X
Rotifer - extended 10X
Mastix of Rotifer 40X
Amoeba 40X
Type 0041 filamentous bacteria 100X
Nocardia filamentous bacteria 40X
Ciliate Chilodonella 160 microns 40X
Ciliate Chilodonella 160 microns 40X
Ciliate Trachelophyllum 10 microns 100X
Ciliate Euplotes 40X
Suctorian 40X
