JPS5559894A - Denitrifying method for waste water by activated sludge process system - Google Patents

Denitrifying method for waste water by activated sludge process system

Info

Publication number
JPS5559894A
JPS5559894A JP13185978A JP13185978A JPS5559894A JP S5559894 A JPS5559894 A JP S5559894A JP 13185978 A JP13185978 A JP 13185978A JP 13185978 A JP13185978 A JP 13185978A JP S5559894 A JPS5559894 A JP S5559894A
Authority
JP
Japan
Prior art keywords
sludge
waste water
ion
acid ion
nitrogen gas
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.)
Granted
Application number
JP13185978A
Other languages
Japanese (ja)
Other versions
JPS6147157B2 (en
Inventor
Tadashi Ishiguro
Hidemi Okamoto
Masaaki Hatta
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP13185978A priority Critical patent/JPS5559894A/en
Publication of JPS5559894A publication Critical patent/JPS5559894A/en
Publication of JPS6147157B2 publication Critical patent/JPS6147157B2/ja
Granted 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 prevent the flotation and effusion of sludge by adding Ca ion and an alcohol or a ketone as a hydrogen donor to waste water containing nitric acid ion and nitrous acid ion in the treatment of waste water thru activated sludge processing system.
CONSTITUTION: When waster wate containing great quantities of nitrogenous compounds, e.g., night soil, sewage, or nitric acid metal washing waste waters, is treated with activated sludge, nitric acid ion and nitrous acid ion are produced, and thus these are reduced by means of the metabolism of facltative anaerobic bscteria to harmless nitrogen gas which is discharged, where bacteria-containing sludge is floated with nitrogen gas bubbles floating in the waste water and effused. This phenomenon can be prevented by the addition of Ca ion a hydrogen donor, e.g., an alcohol or a ketone to saccharides, proteins, and fats in an amount less than theoretical amount required for denitrifying reactions. In this case, CaCO3 is separated out, the specific gravity of the sludge becomes greater, and the flotation and effusion of sludge with the nitrogen gas bubbles can be lessened.
COPYRIGHT: (C)1980,JPO&Japio
JP13185978A 1978-10-26 1978-10-26 Denitrifying method for waste water by activated sludge process system Granted JPS5559894A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13185978A JPS5559894A (en) 1978-10-26 1978-10-26 Denitrifying method for waste water by activated sludge process system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13185978A JPS5559894A (en) 1978-10-26 1978-10-26 Denitrifying method for waste water by activated sludge process system

Publications (2)

Publication Number Publication Date
JPS5559894A true JPS5559894A (en) 1980-05-06
JPS6147157B2 JPS6147157B2 (en) 1986-10-17

Family

ID=15067780

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13185978A Granted JPS5559894A (en) 1978-10-26 1978-10-26 Denitrifying method for waste water by activated sludge process system

Country Status (1)

Country Link
JP (1) JPS5559894A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005512770A (en) * 2001-12-13 2005-05-12 インバイロンメンタル オペレイティング ソリューションズ インコーポレイテッド Wastewater treatment process and equipment
DE102005031865A1 (en) * 2005-07-06 2007-01-18 Peter Schöndorfer Process for avoiding the formation of bulking sludge in biological wastewater treatment plants

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005512770A (en) * 2001-12-13 2005-05-12 インバイロンメンタル オペレイティング ソリューションズ インコーポレイテッド Wastewater treatment process and equipment
DE102005031865A1 (en) * 2005-07-06 2007-01-18 Peter Schöndorfer Process for avoiding the formation of bulking sludge in biological wastewater treatment plants

Also Published As

Publication number Publication date
JPS6147157B2 (en) 1986-10-17

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