JPS5691897A - Controller for digestion vessel - Google Patents

Controller for digestion vessel

Info

Publication number
JPS5691897A
JPS5691897A JP16829579A JP16829579A JPS5691897A JP S5691897 A JPS5691897 A JP S5691897A JP 16829579 A JP16829579 A JP 16829579A JP 16829579 A JP16829579 A JP 16829579A JP S5691897 A JPS5691897 A JP S5691897A
Authority
JP
Japan
Prior art keywords
sludge
value
digestion
charging
digestion vessel
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
JP16829579A
Other languages
Japanese (ja)
Inventor
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 JP16829579A priority Critical patent/JPS5691897A/en
Publication of JPS5691897A publication Critical patent/JPS5691897A/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

Landscapes

  • Treatment Of Sludge (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

PURPOSE: To faciltate a digestion of sludge while preventing a pH value in a digestion vessel from lowering caused by a charge of a sludge, by raising the pH value higher than a predetermined level before charging of a sludge into the digestion vessel.
CONSTITUTION: On charging of a sludge 3 into a digestion vessel 1, a time switch 14 generates an output, corresponding to the charging period, to actuate a charging pump 11. At the same time, a relay switch 13 is connected to the side (b) in the drawing, to input a modified target value from a computer 12 to a controller 10. The computer 12 generates a signal representing a sum of a target value from a target value setting device 9 and a preset value. Consequently, during the sludge charging period, the digestion vessel is operated at a pH value higher, by the preset value than the target value during a normal period. Thus, a sludge digestion is facilitated well, without lowering of a pH value by charge of a sludge.
COPYRIGHT: (C)1981,JPO&Japio
JP16829579A 1979-12-26 1979-12-26 Controller for digestion vessel Pending JPS5691897A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16829579A JPS5691897A (en) 1979-12-26 1979-12-26 Controller for digestion vessel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16829579A JPS5691897A (en) 1979-12-26 1979-12-26 Controller for digestion vessel

Publications (1)

Publication Number Publication Date
JPS5691897A true JPS5691897A (en) 1981-07-25

Family

ID=15865356

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16829579A Pending JPS5691897A (en) 1979-12-26 1979-12-26 Controller for digestion vessel

Country Status (1)

Country Link
JP (1) JPS5691897A (en)

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