公开(公告)号：US20210284556A1

公开(公告)日：2021-09-16

申请号：US17263644

申请日：2019-07-24

Applicant: ORGANO CORPORATION

Inventor： Masaki MIYAKE ,  Yoshiaki HASEBE ,  Shohei YAMAMOTO ,  Hizuru WAKAYAMA

IPC: C02F3/12 ,  C02F3/28

Abstract: A water treatment method that uses a reaction tank and involves repeatedly performing an operation cycle including: an inflow step for causing an inflow of waste water; a biological treatment step for subjecting the waste water to biological treatment using biological sludge; a sedimentation step for causing the biological sludge to settle; and a drainage step for draining biologically-treated water that has undergone the aforementioned biological treatment. The reaction tank is provided with an inflow port that is disposed at a position lower than an interface position of a biological sludge bed formed at the bottom of the reaction tank in the sedimentation step, and an inflow pipe that extends upward in the vertical direction from the inflow port. In the inflow step, the waste water is caused to gravitationally flow down in the inflow pipe so as to be fed into the biological sludge bed from the inflow port.

公开(公告)号：US20240294411A1

公开(公告)日：2024-09-05

申请号：US18574522

申请日：2022-06-22

Applicant: ORGANO CORPORATION

Inventor： Masaki MIYAKE ,  Yoshiaki HASEBE ,  Hizuru WAKAYAMA ,  Kazuki FURUSAWA

IPC: C02F3/12 ,  C02F101/30

CPC classification number: C02F3/12 ,  C02F2101/30 ,  C02F2203/006

Abstract: The present disclosure is an aerobic granule forming method using a semibatch-type reaction tank (10) for forming aerobic granules, the aerobic granule forming method being characterized in that: the organic substance includes an easily decomposable organic substance and a slowly decomposable organic substance; and the time of the biological treatment process is adjusted so that the value obtained by multiplying the ratio of the MLSS concentration in the semibatch-type reaction tank (10) to the BOD loading volume of the easily decomposable organic substance in the semibatch-type reaction tank (10) by [time of the operating cycle/time of the biological treatment process] is in the range of 0.05-0.25 kg BOD/kg MLSS/day.