Claims
- 1. A method of solidification and chemical fixation of a waste comprising:
- adding to the waste at ambient-temperature and pressure biogenetic silica in the presence of a strong alkali on the order of about pH 12 and higher sufficient to form a soluble silicate with the biogenetic silica in the waste and sufficient water to form the soluble silicate, and
- in the presence of at least one polyvalent metal ion sufficient to form a cementitious product with the resulting soluble silicate effective to solidify and chemically fix the liquid waste and to allow said strong alkali to continuously reform to react with the biogenetic silica.
- 2. The method of claim 1 where,
- the biogenetic silica is rice hull ash.
- 3. The method of claim 2 where,
- the waste contains the strong alkali and the polyvalent metal ions sufficient to form the cementitious and chemically fixed product.
- 4. The method of claim 2 where,
- at least a portion of the strong alkali is added to the waste.
- 5. The method of claim 2 where,
- at least a portion of the polyvalent metal ions is added to the waste.
- 6. The method of claim 2 where,
- at least a portion of the strong alkali and polyvalent metal ions are added to the waste.
- 7. The method of claim 1 where,
- the waste is in a tank and biogenetic silica is added to the waste in the tank.
- 8. The method of claim 7 where,
- the biogenetic silica is rice hull ash.
- 9. The method of claim 7 where,
- the waste contains at least a portion of one of the polyvalent metal ions and the strong alkali.
- 10. The method of claim 7 where,
- at least a portion of the polyvalent metal ion and the strong alkali are added to the liquid waste.
- 11. The method of claim 1 where,
- the waste is in a tank and the waste is removed from the tank and the biogenetic silica is added to the removed waste.
- 12. The method of claim 11 where,
- the biogenetic silica is rice hull ash.
- 13. The method of claim 11 where,
- the waste contains at least a portion of one of the polyvalent metal ions and the strong alkali.
- 14. The method of claim 11 where,
- at least a portion of the polyvalent metal ion and the strong alkali are added to the liquid waste.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8717860 |
Jul 1987 |
GBX |
|
RELATED APPLICATION
The present application is a continuation-in-part of U.S. application Ser. No. 224,857 filed July 27, 1988, abandoned in favor of this application.
US Referenced Citations (12)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
224857 |
Jul 1988 |
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