Title:
WASTEWATER TREATMENT METHOD AND WASTEWATER TREATMENT APPARATUS USED THEREFOR
Document Type and Number:
Japanese Patent JP2016198694
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a wastewater treatment method that can improve the quality of treated water, increase the treatable amount of water, and reduce the treatment time while greatly reducing the circulation rate of a nitrified liquid and the amount of supplied air to reduce power consumption per the amount of treated water, by grasping a detailed state in an aerobic tank and performing control according to the state and is excellent in wastewater treatment efficiency, the stability of water quality of treated water, and energy saving.SOLUTION: A wastewater treatment method includes: a reaction step of performing nitrification and denitrification at the same time in an aerobic tank by increasing or decreasing the amount of air so that measured fluorescence amount and pH are within a predetermined range to change the dissolved oxygen concentration according to a load fluctuation; and a nitrified liquid circulation step of, in the reaction step, circulating the wastewater nitrified (nitrified liquid) in the aerobic tank to an anoxic tank on the upstream side of the aerobic tank.SELECTED DRAWING: Figure 2
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Inventors:
CHI SEI DO
Application Number:
JP2015078785A
Publication Date:
December 01, 2016
Filing Date:
April 07, 2015
Export Citation:
Assignee:
NIKKIN KENSETSU KK
International Classes:
C02F3/34; C02F3/12
Attorney, Agent or Firm:
Ichiro Enomoto
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