Abraham Klapwijk

Method for processing manure, fermented manure and ammonium nitrogen containing waste water

The invention relates to a method for processing manure, fermented liquid manure being subjected to nitrification in a first step and to denitrification in a subsequent step, an aerated reactor which contains active sludge rich in nitrifying bacteria being used in the nitrification step and acid-neutralizing chemicals being added to said reactor if necessary and a continuously fed upflow sludge bed (USB) reactor which contains a very compact biomass which is capable of converting nitrate to nitrogen gas and to which an organic substrate is added being used in the denitrification step, the loading of the reactor being controlled to obtain an optimum nitrification and denitrification and this is obtained on the basis of one or more of the following data: the incoming nitrogen load; the information from the WAZU respiration meter; the pH in the nitrification reactor, the criterion for which is that the pH is in the range limited by 6 and 8.5; the temperature in both the nitrification reactor and the denitrification reactor is kept below 40° C.; the concentration of oxidized nitrogen in the influent for the denitrification reactor, the criterion for which is that the concentration is between 0 and 4 g N/l; the concentration of oxidized nitrogen in the nitrification reactor, the criterion for which in the sludge/liquid mixture in the reactor is that the concentration is between 0 and 4 g N/l; the concentration of the carbon source in the effluent from the denitrification reactor; the gas production in the denitrification reactor. The invention further relates to an apparatus for performing this method comprising at least one WAZU respirator meter.