JPS5442850A - Method of treating raw sewage - Google Patents

Method of treating raw sewage

Info

Publication number
JPS5442850A
JPS5442850A JP10927777A JP10927777A JPS5442850A JP S5442850 A JPS5442850 A JP S5442850A JP 10927777 A JP10927777 A JP 10927777A JP 10927777 A JP10927777 A JP 10927777A JP S5442850 A JPS5442850 A JP S5442850A
Authority
JP
Japan
Prior art keywords
digestion tank
tank
nitration
aerobic digestion
liquid
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
JP10927777A
Other languages
Japanese (ja)
Other versions
JPS6222678B2 (en
Inventor
Kiyomi Murata
Yutaka Yamada
Takeshi Kunimi
Shigeki Kimura
Mitsuru Nakayama
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.)
Kubota Corp
Original Assignee
Kubota 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 Kubota Corp filed Critical Kubota Corp
Priority to JP10927777A priority Critical patent/JPS5442850A/en
Publication of JPS5442850A publication Critical patent/JPS5442850A/en
Publication of JPS6222678B2 publication Critical patent/JPS6222678B2/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 promote nitration and denitrification reaction without using alkali and an organic carbon source in an aerobic digestion tank, by introducing mixed liquid flowing out from a nitration tank installed after said digestion tank to said digestion tank.
CONSTITUTION: Raw sewage and two or five times dilution water more than raw sewage are introduced to an aerobic digestion tank while the mixed liquid of a nitration tank mounted after said digestion tank and the settled sludge of a sedimentation basin are returned to said aerobic digestion tank. The mixed liquid and sludge serve as the seed sludge of denitrification, and there happens a nitration phenomenon in the aerobic digestion tank when pH 6W8, DO 0.2W1 ppm and not less than 12°C water temp are maintained while a denitrification phenomenon is generated, thus removing total nitrogen and 80W90 % BOD. Solid and liquid are separated at the next sedimentation basin, supernatant liquid is introduced to the nitration tank and residual ammoniacal nitrogen is nitrified, and its one portion is returned to the aerobic digestion tank and the remainder liquid is fed to the sedimentaion basin
COPYRIGHT: (C)1979,JPO&Japio
JP10927777A 1977-09-10 1977-09-10 Method of treating raw sewage Granted JPS5442850A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10927777A JPS5442850A (en) 1977-09-10 1977-09-10 Method of treating raw sewage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10927777A JPS5442850A (en) 1977-09-10 1977-09-10 Method of treating raw sewage

Publications (2)

Publication Number Publication Date
JPS5442850A true JPS5442850A (en) 1979-04-05
JPS6222678B2 JPS6222678B2 (en) 1987-05-19

Family

ID=14506080

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10927777A Granted JPS5442850A (en) 1977-09-10 1977-09-10 Method of treating raw sewage

Country Status (1)

Country Link
JP (1) JPS5442850A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5638190A (en) * 1979-09-06 1981-04-13 Kubota Ltd Treatment of night soil
JPS5684696A (en) * 1979-12-11 1981-07-10 Nippon Sharyo Seizo Kaisha Ltd Two-stage type sewage treatment apparatus
JPS60243289A (en) * 1984-05-17 1985-12-03 Kobe Steel Ltd Pickling method
JPH04304391A (en) * 1991-03-29 1992-10-27 Itb Srl Method of pickling stainless steel without using nitric acid and passivating stainless steel
JPH06212463A (en) * 1992-08-06 1994-08-02 Itb Srl Method for pickling of stainless steel
JPH06220662A (en) * 1992-10-12 1994-08-09 Itb Srl Method for pickling and immobilization of titanium article

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50113047A (en) * 1974-02-16 1975-09-04
JPS50131353A (en) * 1974-04-04 1975-10-17

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50113047A (en) * 1974-02-16 1975-09-04
JPS50131353A (en) * 1974-04-04 1975-10-17

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5638190A (en) * 1979-09-06 1981-04-13 Kubota Ltd Treatment of night soil
JPS5684696A (en) * 1979-12-11 1981-07-10 Nippon Sharyo Seizo Kaisha Ltd Two-stage type sewage treatment apparatus
JPS6327080B2 (en) * 1979-12-11 1988-06-01 Nippon Sharyo Seizo Kk
JPS60243289A (en) * 1984-05-17 1985-12-03 Kobe Steel Ltd Pickling method
JPH04304391A (en) * 1991-03-29 1992-10-27 Itb Srl Method of pickling stainless steel without using nitric acid and passivating stainless steel
JPH06212463A (en) * 1992-08-06 1994-08-02 Itb Srl Method for pickling of stainless steel
JPH06220662A (en) * 1992-10-12 1994-08-09 Itb Srl Method for pickling and immobilization of titanium article

Also Published As

Publication number Publication date
JPS6222678B2 (en) 1987-05-19

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