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    STUDIA CHEMIA - Ediţia nr.1-2 din 2001  
         
  Articol:   ASPECTS CONCERNING FIXED FILM BIOLOGICAL WASTEWATER TREATMENT.

Autori:  RODICA ELENA CECLAN, OCTAVIAN FLOAREA, MIHAIL CECLAN. 		 
       
         
  Rezumat:  The biological wastewater treatment is a very actual problem taking into account the necessity of aligning the Romanian laws to the European standards. As an interdisciplinary science the chemical engineering plays an important role in achieving this kind of wastewater treatment. The fixed film treatment technology are extremely important in public health control and in environmental protection, being based on the natural mechanism of biological water cleaning. The paper presents the state of the art in the field of biological treatment of municipal wastewater using the fixed film technique (biofilm). The principal causes, water pollution sources and wastewater contaminants are shown; some analytical methods for the water pollution control are also presented. The classification of methods for biological wastewater treatment is accompanied by the issue of the essential functional element of every such equipment, the biofilm issue. After its definition and its approach as ecosystem, information concerning the biofilm composition, structure and formation mechanism are systemized. Physical and mathematical models of the wastewater treatment process are systemized.  
         
     
         
         
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