IT1116870B - Filtration removal of suspended solids from liquid - using particulate polyurethane filter bed regenerated by agitating with liquid to remove deposited solids - Google Patents
Filtration removal of suspended solids from liquid - using particulate polyurethane filter bed regenerated by agitating with liquid to remove deposited solidsInfo
- Publication number
- IT1116870B IT1116870B IT4880379A IT4880379A IT1116870B IT 1116870 B IT1116870 B IT 1116870B IT 4880379 A IT4880379 A IT 4880379A IT 4880379 A IT4880379 A IT 4880379A IT 1116870 B IT1116870 B IT 1116870B
- Authority
- IT
- Italy
- Prior art keywords
- liquid
- solids
- filter bed
- vessel
- agitating
- Prior art date
Links
- 239000007788 liquid Substances 0.000 title abstract 10
- 239000007787 solid Substances 0.000 title abstract 9
- 238000001914 filtration Methods 0.000 title abstract 3
- 229920002635 polyurethane Polymers 0.000 title abstract 3
- 239000004814 polyurethane Substances 0.000 title abstract 3
- 239000002245 particle Substances 0.000 abstract 2
- 230000008929 regeneration Effects 0.000 abstract 2
- 238000011069 regeneration method Methods 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 241000195493 Cryptophyta Species 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
Landscapes
- Filtering Materials (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
In the removal of suspended solids from a liquid by (a) flowing the liquid through a filter bed of discontinuous polyurethane particles in a filtration vessel and discharging solids depleted liquid from the vessel, the filter bed being at least partially loaded with deposited solids, (b) terminating the liquid flow and (c) renewing the filter bed by removing the deposited solids, the improvement comprises that the regeneration step (c) is carried out by adding >=1 bed volume of regeneration liquid (I) to the vessel and mechanically mixing the filter bed in (I) and hold-up liquid resulting from termination of liq. flow to disengage the deposited solids from the polyurethane particles. Solids-enriched liquid is then discharged from the filtration vessel. Only a very low volume of (I) is required. Liquid to be treated may be effluent contg. 40-60 ppm suspended solids, river water, water for use in boilers, or a stream from an algae pond (oxidation ditch).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT4880379A IT1116870B (en) | 1979-04-20 | 1979-04-20 | Filtration removal of suspended solids from liquid - using particulate polyurethane filter bed regenerated by agitating with liquid to remove deposited solids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT4880379A IT1116870B (en) | 1979-04-20 | 1979-04-20 | Filtration removal of suspended solids from liquid - using particulate polyurethane filter bed regenerated by agitating with liquid to remove deposited solids |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IT7948803A0 IT7948803A0 (en) | 1979-04-20 |
| IT1116870B true IT1116870B (en) | 1986-02-10 |
Family
ID=11268631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT4880379A IT1116870B (en) | 1979-04-20 | 1979-04-20 | Filtration removal of suspended solids from liquid - using particulate polyurethane filter bed regenerated by agitating with liquid to remove deposited solids |
Country Status (1)
| Country | Link |
|---|---|
| IT (1) | IT1116870B (en) |
-
1979
- 1979-04-20 IT IT4880379A patent/IT1116870B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| IT7948803A0 (en) | 1979-04-20 |
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