INVENT HyperClassic™ Mixer Aerator Brochure - Treatment ...

H Y P E RC L A S S I C ®An OverviewEfficient and reliableAn intensive mixing is highly importantfor the optimal and safeoperation of an activated sludgeplant. The influence of mixing on thepurification capacity of a plant isquite often underestimated. However,it is easily understandable that e.g.sedimentation on the tank’s bottom,not only diminishes the availablereactor volume, but also representsoxygen depression and a source fortoxins due to the mostly anaerobicputrefaction. Beside reduced performancethis leads to poor sedimentationqualities of the sludge flocs inthe secondary sedimentation tank.All in all one wishes for a systemwhich fulfils the above demandswith regard to optimal bubble sizesand homogenous mixing and isfurthermore flexibly applicable, isof sturdy construction and resistantto wear and tear.Poor mixing, however, also leads tooxygen gradients in the activatedsludge tank. This on the other handreduces the oxygen supply performance,as the driving concentrationgradient diminishes. Furthermore,such non-homogenous occurrencesreduce the customary single pointoxygen measurements to absurdityand only a limited percentage of theexisting reactor volume is used.Figure 1: Oxygen distribution with insufficient mixing- poor purification performanceFigure 2: Oxygen distribution with good mixing &homogenization - excellent purification performance