TY - JOUR N2 - In many wastewater treatment plants (WWTPs) inconveniences resulting from foam formation on the surface of activated sludge wastewater treatment devices appear. Foaming phenomenon is related to the characteristics of raw sewage and applied technological parameters of activated sludge process which promote the development of specific foam-forming filamentous microorganisms. In bulking activated sludges there are about 30 species of filamentous microorganisms and in the foam not more than about 1 O species. Basic method of identification of filamentous microorganisms present in foam are microscopic investigations which can be performed both in vivo by direct observation of no stained, so called living smears, with contrast - phase device and in stained smears alter different stain methods in direct light or dark field. L1 - http://journals.pan.pl/Content/123393/PDF/6_AE_VOL_32_4_2006_Kalisz_Filamentous.pdf L2 - http://journals.pan.pl/Content/123393 PY - 2006 IS - No 4 EP - 42 KW - biological wastewater treatment plants KW - activated sludge KW - foam KW - filamentous microorganisms KW - methods of identification of microorganisms from foam A1 - Kalisz, Liliana A1 - Każrnierczuk, Marcin PB - Polish Academy of Sciences VL - vol. 32 DA - 12.06.2022 T1 - Filamentous Microorganisms Occurring in Foam of Biological Wastewater Treatment Plants and Possibilities Their Identification SP - 35 UR - http://journals.pan.pl/dlibra/publication/edition/123393 T2 - Archives of Environmental Protection ER -