Patent ID: 11945739
Assignee: GOHDA WATER TREATMENT TECHNOLOGY CO., INC.
Field: Measurement (Instruments)
Classification: CPC C  G  Y | IPC C  G

Claim 17:
18. A method for managing operation of a wastewater treatment facility, comprising:
collecting the activated sludge mixed liquid from the aeration tank of the wastewater treatment facility;
performing the test by the testing method according to claim 8 using the collected activated sludge mixed liquid; and
maintaining, increasing, or decreasing a dissolved oxygen content in the aeration tank based on the difference of sedimentation amounts,
wherein the difference of sedimentation amounts is obtained as a difference between a ratio of a volume of a precipitate (a water SV value) to a total volume of the activated sludge mixed liquid and the water having the higher dissolved oxygen concentration than the activated sludge mixed liquid, and a ratio of a volume of a precipitate (a deoxidized SV value) to the total volume of the activated sludge mixed liquid and the water having the lower dissolved oxygen concentration than the activated sludge mixed liquid,
wherein the dissolved oxygen content in the aeration tank is maintained if the water SV value is 1.03 to 1.05 times of the deoxidized SV value,
wherein the dissolved oxygen content in the aeration tank is increased if the water SV value is lower than 1.03 times of the deoxidized SV value, and
wherein the dissolved oxygen content in the aeration tank is decreased if the water SV value is higher than 1.05 times of the deoxidized SV value.