Removal method of nitrogen from water containing nitrate nitrogen and denitrification bioreactor

摘要

PROBLEM TO BE SOLVED: To install a denitrification bioreactor at an optional place (at any place except an anaerobic tank) and to repeatedly use the bioreactor as a single body so that it is a cartridge type. SOLUTION: A biological membrane generated on a hydrogen donor transmission membrane 11 surface is maintained under anaerobic environment inside the membrane body by having a membrane body structure formed by laminating layer 12 for shielding dissolved oxygen on the hydrogen donor transmission membrane 11 surface, so that activity of a denitrification reaction is reinforced. The denitrification bioreactor X enables to form a sealed section enclosing a hydrogen donor (methanol) 2, in nitrate nitrogen-containing water, and consists of a cartridge type membrane body container 1 repeatedly usable as a single body, and at least one sectional wall is formed of the hydrogen donor transmission membrane (a polyethylene membrane) 11 and nonwoven fabric 121 is laminated or covered on the membrane surface, so that the denitrification bioreactor has a membrane body structure on which a layer (an air shielding membrane) for shielding dissolved oxygen is formed by lamination.