GB1354455A - Methods of purifying effluents from the manufacture and bleaching of wood pulp - Google Patents
Methods of purifying effluents from the manufacture and bleaching of wood pulpInfo
- Publication number
- GB1354455A GB1354455A GB5016672A GB5016672A GB1354455A GB 1354455 A GB1354455 A GB 1354455A GB 5016672 A GB5016672 A GB 5016672A GB 5016672 A GB5016672 A GB 5016672A GB 1354455 A GB1354455 A GB 1354455A
- Authority
- GB
- United Kingdom
- Prior art keywords
- flocculated
- wood pulp
- waters
- aluminium sulphate
- solution
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Sludge (AREA)
Abstract
1354455 Purifying waste waters from wood pulp treatment DEGREMONT SOC GENERALE D'EPURATION ET D'ASSAINISSEMENT 31 Oct 1972 [3 Nov 1971] 50166/72 Heading C1C Waste waters from wood pulp treatment are purified by adding aluminium sulphate so as to settle a portion of the non-biodegradable matter contained in the waters, the resulting solution being flocculated by the presence of excess aluminium sulphate with the pH of the solution adjusted to 5À4 by the addition of soda or lime. The settled and flocculated matters are separated and treated to recover the aluminium sulphate. The final solution may be further purified by treatment with activated carbon. The above method may be carried out in the system shown in Fig. 1 wherein waste waters are mixed with the sulphate in settling tank 2. Solid matter is removed in decanter 5. The resulting solution is flocculated in tank 8 by adding soda or lime from tank 9. The flocculated solution passes to decanter 11 and purified waters 13 exit the system. The settled and flocculated solids, 6 and 12, are mixed and then dehydrated in 17. The solids may be incinerated in 19, the resulting ash being treated with sulphuric acid to regenerate to aluminium sulphate.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7139326A FR2159560A5 (en) | 1971-11-03 | 1971-11-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1354455A true GB1354455A (en) | 1974-06-05 |
Family
ID=9085214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5016672A Expired GB1354455A (en) | 1971-11-03 | 1972-10-31 | Methods of purifying effluents from the manufacture and bleaching of wood pulp |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5539679B2 (en) |
| CA (1) | CA987460A (en) |
| ES (1) | ES408119A1 (en) |
| FR (1) | FR2159560A5 (en) |
| GB (1) | GB1354455A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999053133A1 (en) * | 1998-04-08 | 1999-10-21 | Kemira Kemi Ab | Treatment of filtrates from peroxide bleaching of pulp |
| WO2001073195A1 (en) * | 2000-03-24 | 2001-10-04 | Kemira Kemi Ab | Treatment of bleach plant filtrates |
| WO2017077195A1 (en) * | 2015-11-04 | 2017-05-11 | Kemira Oyj | Method for optimising material recovery in a chemical pulping process |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50159143A (en) * | 1974-06-13 | 1975-12-23 | ||
| JPS51116058A (en) * | 1975-04-04 | 1976-10-13 | Toyo Pulp Kk | Method of treating sludge released from pulp plants |
| JPS5844795B2 (en) * | 1979-04-05 | 1983-10-05 | 工業技術院長 | Sodium-based pulping method |
| JPS55137286A (en) * | 1979-04-05 | 1980-10-25 | Kogyo Gijutsuin | Magnesium base pulping method |
| JPS58109896U (en) * | 1982-01-20 | 1983-07-26 | 凸版印刷株式会社 | integrated circuit memory socket |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5339389A (en) * | 1976-09-22 | 1978-04-11 | Sumitomo Chem Co Ltd | Preparation of polymer emulsion |
-
1971
- 1971-11-03 FR FR7139326A patent/FR2159560A5/fr not_active Expired
-
1972
- 1972-10-30 ES ES72408119A patent/ES408119A1/en not_active Expired
- 1972-10-31 GB GB5016672A patent/GB1354455A/en not_active Expired
- 1972-10-31 JP JP10937672A patent/JPS5539679B2/ja not_active Expired
- 1972-11-02 CA CA155,588A patent/CA987460A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999053133A1 (en) * | 1998-04-08 | 1999-10-21 | Kemira Kemi Ab | Treatment of filtrates from peroxide bleaching of pulp |
| US6746568B1 (en) | 1998-04-08 | 2004-06-08 | Kemira Kemi Ab | Treatment of filtrates from peroxide bleaching of pulp |
| WO2001073195A1 (en) * | 2000-03-24 | 2001-10-04 | Kemira Kemi Ab | Treatment of bleach plant filtrates |
| WO2017077195A1 (en) * | 2015-11-04 | 2017-05-11 | Kemira Oyj | Method for optimising material recovery in a chemical pulping process |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS4875802A (en) | 1973-10-12 |
| ES408119A1 (en) | 1976-02-01 |
| JPS5539679B2 (en) | 1980-10-13 |
| FR2159560A5 (en) | 1973-06-22 |
| CA987460A (en) | 1976-04-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |