# US 10,479,710 B2 · Granule-forming method and waste water treatment method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,479,710 B2 - Document ID: US10479710B2 - Status: Granted - Kind: B2 - Application number: 16/069,083 - Filed: 2016-12-28 - Published: 2019-01-24 - Granted: 2019-11-19 - Earliest claimed: 2016-01-12 - Assignees: Organo Corporation - Applicants: Organo Corporation - Inventors: Hatsuhiro Matsuda; Masaaki Tomita; Aki Hamamoto; Masaki Miyake; Yoshiaki Hasebe; Masahiro Eguchi - Web page: https://patentgrep.com/patent/US10479710B2 ## CPC - C02F 3/1263: {Sequencing batch reactors [SBR]} - C02F 3/00: Biological treatment of water, waste water, or sewage {(C02F1/006 takes precedence)} - C02F 3/10: Packings; Fillings; Grids (packing elements in general B01J19/30, B01J19/32) - C02F 3/12: Activated sludge processes - C02F 2203/004: comprising a selector reactor for promoting floc-forming or other bacteria - C02F 2209/08: Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD] - C02F 2209/14: NH3-N - Y02W 10/10: Biological treatment of water, waste water, or sewage - C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes) - Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT ## 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. ## Claims ### Claim 1 A granule-forming method using a semi-batch reaction tank, the method comprising forming granules by repeatedly performing an operation cycle having an introduction step of introducing an organic matter-containing wastewater, a biological treatment step of biologically treating treatment target substances in the organic matter-containing wastewater by using a microbiological sludge, a settling step of allowing the microbiological sludge to settle, and a discharge step of discharging a biologically treated water that has been biologically treated, wherein the operation cycle includes a first operation cycle for performing the biological treatment step at a first sludge load, and a second operation cycle, performed after the first operation cycle, for performing the biological treatment step at a second sludge load, and the first sludge load is set such that a soluble BOD concentration inside the semi-batch reaction tank upon completion of the biological treatment step of the first operation cycle does not fall to a threshold value or below, and the second sludge load is set such that a soluble BOD concentration inside the semi-batch reaction tank upon completion of the biological treatment step of the second operation cycle does not exceed a threshold value. ### Claim 2 (depends on 1) The granule-forming method according to claim 1, wherein a first sludge load/second sludge load ratio is two times or more. ### Claim 3 (depends on 1) The granule-forming method according to claim 1, wherein the second sludge load is set such that an ammoniacal nitrogen concentration inside the semi-batch reaction tank upon completion of the biological treatment step of the second operation cycle is 1 mgN/L or less. ### Claim 4 (depends on 1) The granule-forming method according to claim 1, wherein a biologically treated water outlet of the semi-batch reaction tank is provided above a wastewater inlet, and the biologically treated water is discharged from the treated water outlet by introducing the organic matter-containing wastewater into the semi-batch reaction tank from the wastewater inlet. ### Claim 5 (depends on 1) The granule-forming method according to claim 1, the method further comprising supplying the granule to a continuous biological treatment tank. ### Claim 6 (depends on 2) The granule-forming method according to claim 2, wherein the second sludge load is set such that an ammoniacal nitrogen concentration inside the semi-batch reaction tank upon completion of the biological treatment step of the second operation cycle is 1 mgN/L or less. ### Claim 7 (depends on 2) The granule-forming method according to claim 2, wherein a biologically treated water outlet of the semi-batch reaction tank is provided above a wastewater inlet, and the biologically treated water is discharged from the treated water outlet by introducing the organic matter-containing wastewater into the semi-batch reaction tank from the wastewater inlet. ### Claim 8 (depends on 3) The granule-forming method according to claim 3, wherein a biologically treated water outlet of the semi-batch reaction tank is provided above a wastewater inlet, and the biologically treated water is discharged from the treated water outlet by introducing the organic matter-containing wastewater into the semi-batch reaction tank from the wastewater inlet.