CHEMICAL INJECTION AND MIXING METHOD IN SEWERAGE DRAINAGE PLANT OF RAINWATER COMBINED SEWER SYSTEM AND DISINFECTION EQUIPMENT

Title:

CHEMICAL INJECTION AND MIXING METHOD IN SEWERAGE DRAINAGE PLANT OF RAINWATER COMBINED SEWER SYSTEM AND DISINFECTION EQUIPMENT

Document Type and Number:

Japanese Patent JP3922684

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To provide a contact reaction tank (1) capable of performing sufficient contact at a disinfectant injection point, a piping structure (2) capable of efficiently injecting a disinfectant and a discharge culvert structure (3) capable of efficiently bringing the disinfectant into contact with discharge water in order to disinfect dis charge water during rainy weather.
SOLUTION: At the time of disinfection of discharge water during a heavy rain with the disinfectant, (1) the disinfectant is added to sewage to be brought into contact therewith in a mixing contact water tank having a stirrer and/or a turbulent flow forming mechanism provided to the inflow part of sewage mixed with rainwater of a pump plant and a sewage treatment plant and (2) the disinfectant is injected in sewage mixed with rainwater by an injection pipe or an automatic mixing system having a shape, which enhances the dispersion and diffusion of the disinfectant, provide to a discharge water channel during rainy weather and (3) sewage mixed with rainwater after the injection of the disinfectant is allowed to flow in the discharge water channel provided with a flow blocking wall structure to disinfect flooding water during rainy weather.

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Inventors:

Yutaka Iida
Hideki Yoshida

Application Number:

JP2001264187A

Publication Date:

May 30, 2007

Filing Date:

August 31, 2001

Export Citation:

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Assignee:

Ebara Corporation

International Classes:

C02F1/00; C02F1/50; C02F1/76; (IPC1-7): C02F1/50; C02F1/00; C02F1/76

Domestic Patent References:

JP2000129763A
JP2000167563A

Attorney, Agent or Firm:

Shohei Oguri
Hironori Honda
Toshimitsu Ichikawa
Takeshi Takamatsu
Zenichi Soeda

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