公开(公告)号：US20190023594A1

公开(公告)日：2019-01-24

申请号：US16069083

申请日：2016-12-28

Applicant: ORGANO CORPORATION

Inventor： Hatsuhiro MATSUDA ,  Masaaki TOMITA ,  Aki HAMAMOTO ,  Masaki MIYAKE ,  Yoshiaki HASEBE ,  Masahiro EGUCHI

IPC: C02F3/12

CPC classification number: C02F3/1263 ,  C02F3/00 ,  C02F3/10 ,  C02F3/12 ,  C02F2203/004 ,  C02F2209/08 ,  C02F2209/14 ,  Y02W10/15

Abstract: A granule-forming method using a semi-batch reaction tank, wherein: operation cycles of a first operation cycle for performing a biological treatment step at a first sludge load and after the first operation cycle, a second operation cycle for performing the biological treatment step at a second sludge load are performed repeatedly; the first sludge load is set so that the soluble BOD concentration in the semi-batch reaction tank at the time of completion of the biological treatment step of the first operation cycle does not decrease to a threshold value or less; and the second sludge load is set so that the soluble BOD concentration in the semi-batch reaction tank at the time of completion of the biological treatment step of the second operation cycle is at or below the threshold value.

公开(公告)号：US20210387886A1

公开(公告)日：2021-12-16

申请号：US17417485

申请日：2019-07-12

Applicant: ORGANO CORPORATION

Inventor： Hiro YOSHIKAWA ,  Yudai SUZUKI ,  Masahiro EGUCHI

IPC: C02F9/00

Abstract: Provided is a sterilization method for a water system, the sterilization method being capable of suppressing the production amount of a nitrosamine compound while exhibiting a sufficient sterilization effect in precursor-containing water that contains a nitrosamine compound precursor. In the sterilization method for a water system, a stabilizing composition containing a bromine-based oxidizing agent or a chlorine-based oxidizing agent and a sulfamic acid compound is added to the precursor-containing water that contains the nitrosamine compound precursor.

公开(公告)号：US20180339925A1

公开(公告)日：2018-11-29

申请号：US15559635

申请日：2016-03-03

Applicant: ORGANO CORPORATION

Inventor： Masaki MIYAKE ,  Yoshiaki HASEBE ,  Masahiro EGUCHI

IPC: C02F3/02 ,  C12N1/20 ,  C02F3/00

CPC classification number: C02F3/02 ,  C02F3/006 ,  C02F3/1263 ,  C02F3/30 ,  C02F2003/001 ,  C02F2209/08 ,  C02F2209/10 ,  C12N1/20 ,  Y02W10/15

Abstract: Provided is a method for forming aerobic granules in which a semibatch reactor for forming granules is used, the method involving repeatedly carrying out an inflowing step for causing organic-matter-containing wastewater that includes organic matter to flow in, a biological treatment step for biologically treating substances to be treated in the organic-matter-containing drainage water by using microbial sludge, a settling step for allowing the microbial sludge to settle out, and a discharge step for discharging biologically treated water which has been biologically treated, wherein the reaction time is adjusted such that the value obtained by dividing the total cycle time by the reaction time and multiplying the resulting quotient by the ratio of the MLSS concentration to the BOD load charged into the semibatch reactor is within a range of 0.05 to 0.25 kgBOD/kgMLSS/d, and the sludge is drawn such that the sludge retention period is 5 to 25 days.