Temperature and Nereda
The micro-organisms in a Nereda reactor are not much different from those in a CAS. However, the way they grow does differ. Where the sludge age in an activated sludge is more or less equal for each sludge particle, it differs considerable for sludge granules in the Nereda reactor. Some (smaller) granules may stay in the reactor for a relative short time compared to the average sludge age, whereas others (e.g. the larger granules) stay in the system for a much longer time. As a result, nitrifiers can even be sustained at lower temperatures in a compact system.
It’s no surprise that many of our Nereda plants excel and have a clear competitive advantage in colder regions where design temperatures of 8°C or lower with stringent nitrogen requirements apply. At the same time, application of the Nereda technology in warmer climates, like Australia, Hong Kong, The Middle East and Brazil are known to be a winning combination as well. See below some plants and their wastewater temperature throughout the year.
Moreover, temperatures are rarely constant and show seasonal variations across the year. The flexibility of the Nereda process in dealing with this variation makes it a preferred system for any climatological region.