Landia has completed the installation of its 3500th submersible flowmaker for use in homogenising settled sewage and returning activated sludge in the anoxic treatment of wastewater during denitrification. At this secondary treatment stage, typically part of a step-feed activated sludge process, the flow of mixed liquors passes through each of the anoxic zones where additional settled wastewater is added and the contents of each zone are mixed using Landia’s submersible flowmakers. Aimed at helping lower total nitrogen content, the Landia flowmakers successfully provide anoxic mixing without surface air drag down. The Landia flowmakers give a soft treatment of the effluent, in order to optimise the biological process. With a propeller rotation of 150rv/mn, the flowmakers are equipped with large surface propeller blades, suitable for the requirement of mild treatment of activated sludge.
