Claims
- 1. A process for concentrating a precipitated stabilized fatty sludge which has been recovered from a fatty, proteinaceous, aqueous emulsion waste effluent, said stabilized sludge being obtained by adding to the effluent an acid hydrolyzing metal salt in an amount sufficient to bind organic material present into a complex and reducing the pH to below 5, whereafter the formed complex is precipitated, in the presence of alkaline earth ions by raising the pH to 6-9, whereafter the thus formed stabilized sludge is separated, which process consists essentially of the steps of acidifying said stabilized sludge to a pH less than 2, to thereby form a first aqueous phase and a supernatant, concentrated fatty phase which is separated from said first aqueous phase, heating said separated, concentrated fatty phase to form thereby a free fatty acid-containing liquid phase and a second aqueous phase which contains the precipitation chemicals of said stabilized fatty sludge, and separating said free fatty acid-containing liquid phase from said second aqueous phase.
- 2. The process of claim 1, wherein acidifying is affected by the addition of acid effluent from the decomposition of soap stock.
- 3. The process of claim 2, wherein said second aqueous phase containing the precipitating chemicals, after separation of said free fatty acid-containing phase therefrom is reused as a precipitant.
- 4. The process of claim 1, wherein said second aqueous phase containing the precipitating chemicals, after separation of said free fatty acid-containing phase therefrom, is reused as precipitant.
- 5. The process of claim 1 wherein said effluent is the effluent from a margarine factory.
- 6. The process of claim 1 wherein said effluent is the effluent from a meat/bone meal factory.
Priority Claims (1)
Number |
Date |
Country |
Kind |
247/74 |
Jan 1974 |
NO |
|
Parent Case Info
This application is a continuation application of Ser. No. 496,014, filed Aug. 7, 1974, now abandoned.
US Referenced Citations (15)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1,928,689 |
Jun 1969 |
DT |
Continuations (1)
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Number |
Date |
Country |
Parent |
496014 |
Aug 1974 |
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