livestock Odor control Biofilm 脱臭装置の再現と生物膜機能の安定性を調査し、ANAMMOX系脱窒素系の反応が生じているのか?を解明して行きたい。 The livestock barn is becoming a closed type (shield type) to prevent infections such as bird flu and foot-and-mouth disease. On the other hand, the generation of odors associated with indoor ventilation is manure collection and animal odors, so physical and chemical methods are costly and economically impaired. Since we succeeded in applying the biofilm method in the pig farm as a demonstration test machine, we will redesign it as a practical machine and enhance its functions. I would like to clarify that the denitrification of the ANAMMOX system, which was unknown at that time, is functioning.