JPS54139261A - Method of treating sludge - Google Patents
Method of treating sludgeInfo
- Publication number
- JPS54139261A JPS54139261A JP4746378A JP4746378A JPS54139261A JP S54139261 A JPS54139261 A JP S54139261A JP 4746378 A JP4746378 A JP 4746378A JP 4746378 A JP4746378 A JP 4746378A JP S54139261 A JPS54139261 A JP S54139261A
- Authority
- JP
- Japan
- Prior art keywords
- stage
- sludge
- valency chromium
- incinerator
- atmosphere
- 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
Links
Landscapes
- Gasification And Melting Of Waste (AREA)
- Treatment Of Sludge (AREA)
Abstract
PURPOSE: To reduce six valency chromium to three valency chromium as no harm by passing sludge containing charomium through a step of high temperature reducing atmosphere when the sludge is incinerated in multi-stage incinerator.
CONSTITUTION: Sludge produced upon treating of sewage and factory waste water containing fine chronium is charged from an inlet 4 of a multi-stage incinerator 1. The sludge is introduced through a drying stage A, burning stage B, reducing stage C, and cooling stage D in the incinerator to be thus incinerated to become ash and to be exhausted from an outlet. CO gas is introduced into the stage C externally or activated charcoal or finely pulverized charcoal or the like is added thereto to produce CO gas to thereby produce atmosphere containing O2 < 1.0%, CO: 0.1 to 1.0%, the residue N at higher than 600° as rducing atmosphere. The six valency chromium passed through the stage B is reduced to three valency chromium to become ash of no harm and to be cooled at the stage C to be thus exhausted.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4746378A JPS54139261A (en) | 1978-04-21 | 1978-04-21 | Method of treating sludge |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4746378A JPS54139261A (en) | 1978-04-21 | 1978-04-21 | Method of treating sludge |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54139261A true JPS54139261A (en) | 1979-10-29 |
Family
ID=12775839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4746378A Pending JPS54139261A (en) | 1978-04-21 | 1978-04-21 | Method of treating sludge |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54139261A (en) |
-
1978
- 1978-04-21 JP JP4746378A patent/JPS54139261A/en active Pending
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