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Critical review of the literature
The velocity gradient and energy dissipation
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activated sludge adopted aeration basins aeration reactors aeration systems aeration tanks applying approach approximately biological bubbles Budapest characteristic concentration conclusions condition equations considerations constant correlation cost functions criterion deflocculation derived described diameter digester dimensional analysis dimensionless groups dimensionless numbers dimensionless quantities dimensionless relation dimensions discharge equipment experimental experiments exponent expression fermentation flocculation flocs flow-through Froude Law Froude number geometrically similar systems Horvath hydraulic identical injection invariance investigations Kalinske kinetic laboratory mass transfer coefficient measurement data mixers model and prototype model law model studies obtained operating oxygen transfer paper parameters particles power demand practical ratio recirculation relationship retention Reynolds number role rotor scale effect scale factor scale ratio scale-up problems scaling-up settling basins settling tanks settling velocity similarity criteria similarity theory similitude Stokes Law surface loading systems of different theoretical tion trickling filters turbulent flow unit validity range variables volume wastewater treatment Zlokarnik