JPS57110386A - Method and apparatus for treating sewage - Google Patents

Method and apparatus for treating sewage

Info

Publication number
JPS57110386A
JPS57110386A JP55185777A JP18577780A JPS57110386A JP S57110386 A JPS57110386 A JP S57110386A JP 55185777 A JP55185777 A JP 55185777A JP 18577780 A JP18577780 A JP 18577780A JP S57110386 A JPS57110386 A JP S57110386A
Authority
JP
Japan
Prior art keywords
sludge
zone
inflow
inflow zone
tank
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
JP55185777A
Other languages
Japanese (ja)
Other versions
JPS5838233B2 (en
Inventor
Noboru Hayakawa
Shigeru Inami
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.)
Nishihara Environment Co Ltd
Original Assignee
Nishihara Environmental Sanitation Research 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 Nishihara Environmental Sanitation Research Corp filed Critical Nishihara Environmental Sanitation Research Corp
Priority to JP55185777A priority Critical patent/JPS5838233B2/en
Publication of JPS57110386A publication Critical patent/JPS57110386A/en
Publication of JPS5838233B2 publication Critical patent/JPS5838233B2/en
Expired 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

Landscapes

  • Activated Sludge Processes (AREA)

Abstract

PURPOSE: To treat sewage efficiently without causing any bulking by a method wherein the sludge concentration in an inflow zone is maintained at an appropriate level by returning a liquid in a main aeration tank to the inflow zone.
CONSTITUTION: In a continuous-type activated sludge treatment of sewage, the sludge inflow is directed into the inflow zone instead of introduced directly into the main aeration tank 6. In this case, part of the liquid in the tank 6 is returned into the inflow zone 5 to maintain the sludge concentration in the zone 5 at an appropriate level. A lower part of the inflow zone 5 is communicated to the main aeration tank 6 through an appropriate opening, and the organic matter load on the sludge is very high in the inflow zone 5 so that the propagation of microorganism (which is a cause of bulking) is inhibited and, therefore, bulking does notoccur. In addition, the organic matter is well adsorbed on the sludge. The returning of the sludge from the tank 6 into the inflow zone 5 constitutes an effective means for maintaining the sludge concentration in the zone 5 at an appropriate level. In returning the sludge, the liquid fed through a liquid feed pipe 8 and air fed through an air feed pipe 9 are mixed and jetted through a nozzle 7. The nozzle 7 of the same construction is used in both the tank 6 and the inflow zone 5.
COPYRIGHT: (C)1982,JPO&Japio
JP55185777A 1980-12-27 1980-12-27 Sewage treatment method and equipment Expired JPS5838233B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55185777A JPS5838233B2 (en) 1980-12-27 1980-12-27 Sewage treatment method and equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55185777A JPS5838233B2 (en) 1980-12-27 1980-12-27 Sewage treatment method and equipment

Publications (2)

Publication Number Publication Date
JPS57110386A true JPS57110386A (en) 1982-07-09
JPS5838233B2 JPS5838233B2 (en) 1983-08-22

Family

ID=16176702

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55185777A Expired JPS5838233B2 (en) 1980-12-27 1980-12-27 Sewage treatment method and equipment

Country Status (1)

Country Link
JP (1) JPS5838233B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6465983A (en) * 1987-09-07 1989-03-13 Ricoh Kk Digital color copying machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6465983A (en) * 1987-09-07 1989-03-13 Ricoh Kk Digital color copying machine

Also Published As

Publication number Publication date
JPS5838233B2 (en) 1983-08-22

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