GB453285A - Process for purifying waste waters containing grease and soap - Google Patents
Process for purifying waste waters containing grease and soapInfo
- Publication number
- GB453285A GB453285A GB1077735A GB1077735A GB453285A GB 453285 A GB453285 A GB 453285A GB 1077735 A GB1077735 A GB 1077735A GB 1077735 A GB1077735 A GB 1077735A GB 453285 A GB453285 A GB 453285A
- Authority
- GB
- United Kingdom
- Prior art keywords
- calcium
- lime
- sludge
- sulphate
- waste water
- 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)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Sludge (AREA)
Abstract
Fats are extracted by means of solvents from sludge precipitated when waste water containing grease or soap is treated with calcium sulphate or with both a calcium salt, such as chloride sulphate or lactate, and lime. Natural calcium sulphate, more or less pulverized and dehydrated, may be used or calcium sulphate obtained as waste in the production of calcium phosphates. Or the calcium sulphate may be produced by neutralizing lime or calcium carbonate in the waste water to be treated by means of sulphuric acid or bisulphate. The precipitate formed is removed by decantation, filtration or centrifugal treatment. Turf dust, sawdust or refuse obtained by willowing wool may be added to the separated sludge which is dried before treatment with the solvents for the fats.ALSO:Waste water containing grease or soap is treated with calcium sulphate or with both a calcium salt, such as chloride, sulphate or lactate, and lime in sufficient quantity to yield, after precipitation, water which is hard or contains calcium salt in solution and lime in suspension. Natural calcium sulphate, more or less pulverized and dehydrated, may be used or calcium sulphate obtained as waste in the production of calcium phosphates. Or the calcium sulphate may be produced by neutralizing lime or calcium carbonate in the waste water to be treated by means of sulphuric acid or bisulphate. The precipitate formed is removed by decantation, filtration or centrifugal treatment. Lime may be added to the water from which the first precipitate has been removed and further precipitate separated by decantation &c. Turf dust, sawdust or refuse obtained by willowing wool may be added to the separated sludge, which may be dried and treated with solvents for the fats, a residue suitable for use as manure being obtained. If the water treated contains only a small quantity of grease the sludge, either alone or mixed with sludge separated from the waste water before treatment as described above, may be used for the manufacture of cement.ALSO:Sludge, obtained by treating waste water containing grease or soap with calcium sulphate or with both a calcium salt and lime, may be used as material for the manufacture of cement, either alone or in admixture with sludge separated from the waste water before such treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1077735A GB453285A (en) | 1935-04-08 | 1935-04-08 | Process for purifying waste waters containing grease and soap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1077735A GB453285A (en) | 1935-04-08 | 1935-04-08 | Process for purifying waste waters containing grease and soap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB453285A true GB453285A (en) | 1936-09-09 |
Family
ID=9974066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1077735A Expired GB453285A (en) | 1935-04-08 | 1935-04-08 | Process for purifying waste waters containing grease and soap |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB453285A (en) |
-
1935
- 1935-04-08 GB GB1077735A patent/GB453285A/en not_active Expired
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