IT1244625B - Procedimento ed impianto per la depurazione di fanghi biologici - Google Patents
Procedimento ed impianto per la depurazione di fanghi biologiciInfo
- Publication number
- IT1244625B IT1244625B ITTO910025A ITTO910025A IT1244625B IT 1244625 B IT1244625 B IT 1244625B IT TO910025 A ITTO910025 A IT TO910025A IT TO910025 A ITTO910025 A IT TO910025A IT 1244625 B IT1244625 B IT 1244625B
- Authority
- IT
- Italy
- Prior art keywords
- chemical
- sludges
- heavy metal
- sewerage
- metal salts
- Prior art date
Links
- 238000000034 method Methods 0.000 title abstract 2
- 150000003839 salts Chemical class 0.000 abstract 3
- 239000000126 substance Substances 0.000 abstract 3
- 238000011282 treatment Methods 0.000 abstract 3
- 229910001385 heavy metal Inorganic materials 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- 239000007787 solid Substances 0.000 abstract 2
- 239000002699 waste material Substances 0.000 abstract 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract 1
- 235000011941 Tilia x europaea Nutrition 0.000 abstract 1
- 239000011230 binding agent Substances 0.000 abstract 1
- 239000004568 cement Substances 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000000855 fermentation Methods 0.000 abstract 1
- 230000004151 fermentation Effects 0.000 abstract 1
- 239000004571 lime Substances 0.000 abstract 1
- 239000010802 sludge Substances 0.000 abstract 1
- 231100000331 toxic Toxicity 0.000 abstract 1
- 230000002588 toxic effect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Landscapes
- Treatment Of Sludge (AREA)
Abstract
Nei procedimenti di depurazione aerobica di liquami civili o industriali si ottiene un eccesso di fanghi biologici dove si concentra la massima parte dei sali di metalli pesanti tossici contenuti nei liquami. Lo stesso dicasi per i fanghi di risulta da trattamenti anaerobici dei suddetti. Entrambi i tipi di fango vengono sottoposti ad un trattamento termico-chimico che provoca il distacco dei sali dei metalli pesanti legati alle cellule vive e loro rilascio nell'acqua di supero dalla quale possono venir separati come sali insolubili tramite un trattamento chimico-fisico. Il solido restante viene inertizzato con calce, cemento e leganti chimici in modo da non dare più reazioni di copertura e per discariche di rifiuti solidi urbani.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITTO910025A IT1244625B (it) | 1991-01-17 | 1991-01-17 | Procedimento ed impianto per la depurazione di fanghi biologici |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITTO910025A IT1244625B (it) | 1991-01-17 | 1991-01-17 | Procedimento ed impianto per la depurazione di fanghi biologici |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| ITTO910025A0 ITTO910025A0 (it) | 1991-01-17 |
| ITTO910025A1 ITTO910025A1 (it) | 1992-07-17 |
| IT1244625B true IT1244625B (it) | 1994-08-08 |
Family
ID=11408790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ITTO910025A IT1244625B (it) | 1991-01-17 | 1991-01-17 | Procedimento ed impianto per la depurazione di fanghi biologici |
Country Status (1)
| Country | Link |
|---|---|
| IT (1) | IT1244625B (it) |
-
1991
- 1991-01-17 IT ITTO910025A patent/IT1244625B/it active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| ITTO910025A0 (it) | 1991-01-17 |
| ITTO910025A1 (it) | 1992-07-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 0001 | Granted | ||
| TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19931231 |