JPS5681196A - Denitrification of waste water - Google Patents

Denitrification of waste water

Info

Publication number
JPS5681196A
JPS5681196A JP15803579A JP15803579A JPS5681196A JP S5681196 A JPS5681196 A JP S5681196A JP 15803579 A JP15803579 A JP 15803579A JP 15803579 A JP15803579 A JP 15803579A JP S5681196 A JPS5681196 A JP S5681196A
Authority
JP
Japan
Prior art keywords
bacteria
carriers
nitrogen gas
linear speed
packed tower
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15803579A
Other languages
Japanese (ja)
Inventor
Koichi Hatanaka
Tadashi Yamazaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Plant Technologies Ltd
Original Assignee
Hitachi Plant Technologies Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Plant Technologies Ltd filed Critical Hitachi Plant Technologies Ltd
Priority to JP15803579A priority Critical patent/JPS5681196A/en
Publication of JPS5681196A publication Critical patent/JPS5681196A/en
Pending legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Abstract

PURPOSE: To maintain at a proper level an amount of bacteria adhering onto carriers for a stable operational effect, by injecting nitrogen gas through the bottom of a packed tower of a denitrification apparatus so as to prevent the bacteria from excessively adhering onto the carriers.
CONSTITUTION: Nitrogen gas is injected at a proper linear speed through the bottom of a packed tower of a fluidized bed type denitrification apparatus, while waste water containing nitric and nitrous nitrogen is charged into the packed tower. The nitrogen gas injection fluidizes carriers with adhering denitrificating bacteria and also maintains at a proper level an amount of the bacteria adhereing onto carriers for a long period. Said proper linear speed is changed in accordance with the kind of the carriers, a packing ratio and the volume of the nitrogen, but is preferably in the range of about 2W20m/hr. Besides, in this invention process, an adhesion balance of the bacteria, as a result of the bacteria splitting from and growing fat on the carriers, is easily controlled by the linear speed of nitrogen gas.
COPYRIGHT: (C)1981,JPO&Japio
JP15803579A 1979-12-07 1979-12-07 Denitrification of waste water Pending JPS5681196A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15803579A JPS5681196A (en) 1979-12-07 1979-12-07 Denitrification of waste water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15803579A JPS5681196A (en) 1979-12-07 1979-12-07 Denitrification of waste water

Publications (1)

Publication Number Publication Date
JPS5681196A true JPS5681196A (en) 1981-07-02

Family

ID=15662839

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15803579A Pending JPS5681196A (en) 1979-12-07 1979-12-07 Denitrification of waste water

Country Status (1)

Country Link
JP (1) JPS5681196A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003033785A (en) * 2001-07-26 2003-02-04 Kurita Water Ind Ltd Method and device for denitrification

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003033785A (en) * 2001-07-26 2003-02-04 Kurita Water Ind Ltd Method and device for denitrification

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