JPS5794389A - Sludge concentrating method - Google Patents

Sludge concentrating method

Info

Publication number
JPS5794389A
JPS5794389A JP17218980A JP17218980A JPS5794389A JP S5794389 A JPS5794389 A JP S5794389A JP 17218980 A JP17218980 A JP 17218980A JP 17218980 A JP17218980 A JP 17218980A JP S5794389 A JPS5794389 A JP S5794389A
Authority
JP
Japan
Prior art keywords
concn
carbon dioxide
signal
sludge
aeration
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
JP17218980A
Other languages
Japanese (ja)
Inventor
Kenji Baba
Shoji Watanabe
Toshio Yahagi
Hitoshi Ogasawara
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 Ltd
Original Assignee
Hitachi 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 Ltd filed Critical Hitachi Ltd
Priority to JP17218980A priority Critical patent/JPS5794389A/en
Publication of JPS5794389A publication Critical patent/JPS5794389A/en
Priority to US07/262,212 priority patent/US4904388A/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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
    • 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 suppress and prevent the floating and concentrating of sludge and improve the sludge concentrating rate by aerating the sludge prior to settling and concentrating, detecting the concn. of the waste gas released from the sludge, and controlling the flow rate of aeration according to the concn. of the waste gas.
CONSTITUTION: The concn. of the carbon dioxide in the waste gas of aeration is detected with a carbon dioxide concn. detector 16, and its signal is fed to a controller 17. In the controller 17, the target value of the carbon dioxide concn. set with a setter 18 is inputted as a signal and the deviation with the detection signal of the carbon dioxide concn. is operated. According to this deviation, the controller such as PID operates to feed a control signal to a converter 19 which converts this to the signal necessary for controlling a blower 4. Thence, the discharge rate (aeration rate) of the blower is increased or decreased according to this signal, whereby the concn. of the carbon dioxide in the waste gas of aeration is so controlled as to be maintained at around the prescribed value.
COPYRIGHT: (C)1982,JPO&Japio
JP17218980A 1980-12-05 1980-12-05 Sludge concentrating method Pending JPS5794389A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP17218980A JPS5794389A (en) 1980-12-05 1980-12-05 Sludge concentrating method
US07/262,212 US4904388A (en) 1980-12-05 1988-10-21 Process for sludge thickening

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17218980A JPS5794389A (en) 1980-12-05 1980-12-05 Sludge concentrating method

Publications (1)

Publication Number Publication Date
JPS5794389A true JPS5794389A (en) 1982-06-11

Family

ID=15937221

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17218980A Pending JPS5794389A (en) 1980-12-05 1980-12-05 Sludge concentrating method

Country Status (1)

Country Link
JP (1) JPS5794389A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61137947A (en) * 1984-12-11 1986-06-25 村樫石灰工業株式会社 Formation of uneven geometrical pattern on surface of concrete panel
JPWO2013027713A1 (en) * 2011-08-24 2015-03-19 東レ株式会社 Fresh water generation method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61137947A (en) * 1984-12-11 1986-06-25 村樫石灰工業株式会社 Formation of uneven geometrical pattern on surface of concrete panel
JPWO2013027713A1 (en) * 2011-08-24 2015-03-19 東レ株式会社 Fresh water generation method
US9878269B2 (en) 2011-08-24 2018-01-30 Toray Industries, Inc. Fresh water generation method

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