PROCESSING SYSTEM AND PROCESSING METHOD FOR NITROGEN CONTAINING ORGANIC WASTE WATER

TREATMENT SYSTEM AND TREATMENT METHOD FOR NITROGEN-CONTAINING ORGANIC WASTE WATER A treatment system for nitrogen-containing organic waste water, configured by: comprising an autotrophic denitrifying device (30) that denitrifies by performing nitritation, whereby ammonia contained in water to be treated is oxidized into nitrous acid by autotrophic microbes under aerobic conditions, and anaerobic ammonium oxidation by autotrophic microbes under anaerobic conditions, using ammonium nitrogen as an electron donor and nitrite nitrogen as an electron receptor; comprising, at the stage before the autotrophic denitrifying device (30), a suspended organic matter separation device (10) that separates suspended organic matter contained in the water to be treated, and a sludge anaerobic digestion device (40) that anaerobically digests the suspended organic matter separated by the suspended organic matter separation device (10); and comprising a first transfer path (R1) that supplies digestive fluid from the sludge anaerobic digestion device (40) to the autotrophic denitrifying device (30). The treatment system for nitrogen-containing waste water efficiently performs anaerobic ammonium oxidation using autotrophic microbes, even if the waste water has a low ammonia concentration and includes suspended organic matter. (Fig. 1)