公开(公告)号：US20210261450A1

公开(公告)日：2021-08-26

申请号：US17253355

申请日：2019-06-20

Applicant: ORGANO CORPORATION

Inventor： Hironori YUI ,  Taichi YAMAMOTO ,  Masaki MIYAKE ,  Yoshiaki HASEBE

IPC: C02F3/34 ,  C02F3/28

Abstract: Provided are: a water treatment method that includes at least a denitrification step for denitrifying water to be treated with a denitrifying bacterium in the presence of a hydrogen donor, wherein the denitrification activity of the denitrifying bacterium can be maintained at a high level and thus the treatment speed can be increased; and a water treatment apparatus. The water treatment method includes at least a denitrification step for passing water to be treated through a biological treatment tank and denitrifying the same with a heterotrophic denitrifying bacterium in the presence of a hydrogen donor, wherein: molybdenum is added to the water to be treated to give a concentration of 0.01-1.0 mgMo/gN; a carrier is added to the biological treatment tank; and the nitrogen load to the carrier is controlled to 1.6 kgN/(m3-carrier·d) or greater.