JPS57159595A - Purification of thin crude night soil - Google Patents
Purification of thin crude night soilInfo
- Publication number
- JPS57159595A JPS57159595A JP4482581A JP4482581A JPS57159595A JP S57159595 A JPS57159595 A JP S57159595A JP 4482581 A JP4482581 A JP 4482581A JP 4482581 A JP4482581 A JP 4482581A JP S57159595 A JPS57159595 A JP S57159595A
- Authority
- JP
- Japan
- Prior art keywords
- thickener
- solid matter
- aerobic biological
- biological purification
- night soil
- 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
- 238000000746 purification Methods 0.000 title abstract 6
- 239000002689 soil Substances 0.000 title abstract 5
- 239000002562 thickening agent Substances 0.000 abstract 6
- 239000007787 solid Substances 0.000 abstract 5
- 230000029087 digestion Effects 0.000 abstract 4
- 239000006228 supernatant Substances 0.000 abstract 3
- 239000007788 liquid Substances 0.000 abstract 1
- 238000001556 precipitation Methods 0.000 abstract 1
- 238000004062 sedimentation Methods 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
Landscapes
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
PURPOSE: To efficiently perform anaerobic digestion and aerobic biological purification, by subjecting the solubilized, digested and concentrated solid matter of thin crude night soil to the anaerobic digestion, extracting separated supernatant, and subjecting the supernatant to the aerobic biological purification.
CONSTITUTION: Thin crude night soil is introduced into a heated thickener 2, after optionally subjected to preliminary soil-liquid separation in a sedimentation pool 1. The thickener 2 has a capacity capable of reserving a three or more day's volume of night soil. During staying in the thickener 2, the night soil is concentrated by precipitation of solid matter, while the resultant supernatant is discharged for aerobic biological purification as post-treatment. On the other hand, the conc. solid matter settled in the thickener 2 is taken out through the bottom of the thickener 2 and transferred to an anaerobic digestion vessel 3. Effluent formed by digestion is not carried as such to the aerobic biological purification, but temporarily returned to the thickener 2. Consequently, the solid matter is settled again, and the inflow of the solid matter into the aerobic biological purification step can be inhibited.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4482581A JPS57159595A (en) | 1981-03-27 | 1981-03-27 | Purification of thin crude night soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4482581A JPS57159595A (en) | 1981-03-27 | 1981-03-27 | Purification of thin crude night soil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57159595A true JPS57159595A (en) | 1982-10-01 |
Family
ID=12702224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4482581A Pending JPS57159595A (en) | 1981-03-27 | 1981-03-27 | Purification of thin crude night soil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57159595A (en) |
-
1981
- 1981-03-27 JP JP4482581A patent/JPS57159595A/en active Pending
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