JPS567610A - Modifying sludge flocculant - Google Patents

Modifying sludge flocculant

Info

Publication number
JPS567610A
JPS567610A JP8271279A JP8271279A JPS567610A JP S567610 A JPS567610 A JP S567610A JP 8271279 A JP8271279 A JP 8271279A JP 8271279 A JP8271279 A JP 8271279A JP S567610 A JPS567610 A JP S567610A
Authority
JP
Japan
Prior art keywords
sludge
tank
flocculant
treating
waste water
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
JP8271279A
Other languages
Japanese (ja)
Inventor
Akira Sueda
Masanori Yoshinaga
Machiko Taki
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.)
Mitsubishi Kakoki Kaisha Ltd
Original Assignee
Mitsubishi Kakoki Kaisha 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 Mitsubishi Kakoki Kaisha Ltd filed Critical Mitsubishi Kakoki Kaisha Ltd
Priority to JP8271279A priority Critical patent/JPS567610A/en
Publication of JPS567610A publication Critical patent/JPS567610A/en
Pending legal-status Critical Current

Links

Landscapes

  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Treatment Of Sludge (AREA)

Abstract

PURPOSE: To obtain a perfect flocculant which is perfectly decomposed in soil without giving any adverse influence upon living things at all in the natural ecological systems, by treating the sludge being discharged from the activated sludge process of waste water treating process then neutralizing the same with inorganic acids.
CONSTITUTION: An activated sludge treating tank 1 is provided in sewer and waste water treating process and the sludge component produced in the activated sludge treatment is sedimented and separated by a final sedimenting tank 2. A portion of the sludge extracted from the tank 2 is used as return sludge 3 into the tank 1 and the rest is transferred as excess sludge 4 to the sludge treatment process. It is taken out from the extraction line of the tank 2 as raw material sludge. Preferably it is dehydrated by a dehydrator 5, and is led into a tank 6, where it is treated with alkalis such as caustic soda and is thereby gelled. The amount of alkali addition is made ≤1% as a whole and preferably in a range of 0.1W0.3%. In a tank 7, it is neutralized by inorganic acids such as hydrochloric acids and is made into sol to have suitable characteristics as a flocculant. The pH after the neutralization is kept in a range of 5W7.
COPYRIGHT: (C)1981,JPO&Japio
JP8271279A 1979-07-02 1979-07-02 Modifying sludge flocculant Pending JPS567610A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8271279A JPS567610A (en) 1979-07-02 1979-07-02 Modifying sludge flocculant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8271279A JPS567610A (en) 1979-07-02 1979-07-02 Modifying sludge flocculant

Publications (1)

Publication Number Publication Date
JPS567610A true JPS567610A (en) 1981-01-26

Family

ID=13782011

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8271279A Pending JPS567610A (en) 1979-07-02 1979-07-02 Modifying sludge flocculant

Country Status (1)

Country Link
JP (1) JPS567610A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6071008A (en) * 1983-09-26 1985-04-22 Sanyo Chem Ind Ltd Preparation of substance having flocculation activity
JPS6071009A (en) * 1983-09-26 1985-04-22 Sanyo Chem Ind Ltd Preparation of substance having flocculation activity
JPS62102900A (en) * 1985-10-28 1987-05-13 Dia Furotsuku Kk Dehydration method for sludge

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6071008A (en) * 1983-09-26 1985-04-22 Sanyo Chem Ind Ltd Preparation of substance having flocculation activity
JPS6071009A (en) * 1983-09-26 1985-04-22 Sanyo Chem Ind Ltd Preparation of substance having flocculation activity
JPS62102900A (en) * 1985-10-28 1987-05-13 Dia Furotsuku Kk Dehydration method for sludge

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