The objective of study was to define the removal rate of the indicator microorganisms on various types of trickling filters with regard to the influence of: magnetic stream and electric current passage, on the effectiveness of microorganisms adsorption onto the media. The hydraulic loading in the first eight variants were changing, variants 9-14 were peformed at a constant loading. The study results have indicated a positive influence of the extra energy sources i. e. a magnetic stream and electric current on the process of indicatory microorganisms removal from the waste water.