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AssigneeEcotechniek B.V.
InventorsIman W. Koster, Abraham Klapwijk
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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.degree. 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.
Method for processing manure, wherein fermented liquid manure is subjected to nitrification in a first step in an aerated nitrification reactor containing active sludge rich in nitrifying bacteria used in the nitrification step, acid-neutralizing chemicals being added to said nitrification reactor if necessary, and the effluent of the liquid manure from the nitrification reactor is then subjected to dentrification in a subsequent step in a continuously fed upflow sludge bed denitrification reactor containing a very compact biomass which is capable of converting nitrate to nitrogen gas and to which an organic substrate is added for use in the denitrification step, wherein the loading of the nitrification reactor is controlled to obtain optimal nitrification and denitrification on the basis of at least one of the following data:
Method for processing manure, wherein fermented liquid manure is subjected to nitrification in a first step in an aerated nitrification reactor containing active sludge rich in nitrifying bacteria, acid-neutralizing chemicals being added to said nitrification reactor if necessary, and the effluent of the liquid manure from the nitrification reactor is then subjected to denitrification in a subsequent step in a continuously fed upflow sludge bed denitrification reactor containing a very compact biomass for converting nitrate to nitrogen gas and to which an organic substrate is added, the temperature in both the nitrification reactor and the dentrification reactor being kept below 40.degree. C. and the pH in the nitrification reactor being maintained in a range from about 6 to about 8.5;
Dependencies are inferred from the claim text.