Title:
AEROBIC BIOLOGICAL TREATMENT DEVICE AND ITS OPERATION METHOD
Document Type and Number:
Japanese Patent JP2021010853
Kind Code:
A
Abstract:
To provide an aerobic biological treatment device that prevents carriers from sticking to each other resulting in agglomeration and can perform stable biological treatment for a long period of time and its operation method.SOLUTION: An aerobic biological treatment device 1 includes: a reaction tank (tank body) 2; a water-permeable plate 3 horizontally installed at a bottom of the reaction tank 2; a large-diameter particle layer 4 formed on an upper side of the water-permeable plate 3; a small-diameter particle layer 5 formed on an upper side of the large-diameter particle layer 4; an oxygen dissolution film module 6 installed on an upper side of the small particle layer 5; a receiving chamber 7 formed under the water permeable plate 3; a raw water spray pipe 8 that supplies raw water into the receiving chamber 7; a cleaning pipe 9 installed to disperse air in the receiving chamber 7, and the like. An abundance ratio of oligotrophic bacteria in aerobic microorganisms in the reaction tank 2 is adjusted to 7% or more.SELECTED DRAWING: Figure 1
Inventors:
SAWAMURA DAICHI
FUKASE TETSURO
FUKASE TETSURO
Application Number:
JP2019124621A
Publication Date:
February 04, 2021
Filing Date:
July 03, 2019
Export Citation:
Assignee:
KURITA WATER IND LTD
International Classes:
C02F3/08; B01D63/02; B01F1/00; C02F3/34
Attorney, Agent or Firm:
Tsuyoshi Shigeno
Takayuki Shigeno
Takayuki Shigeno