Disposal method and use of sewage sludge
US4028130A · kind A · utility
71Cited by
6References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1974 |
| Grant date | Jun 7, 1977 |
| Priority date | — |
| Expiry date | Nov 15, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S106/01
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Digested sewage sludge resulting from sewage plant treatment of municipal sewage is disposed of and used in an ecologically acceptable manner by the incorporation of such sludge in hardenable compositions further including, for example, lime, fly ash and, in some cases, alkaline earth metal sulfates and/or soil or other inert or complimentary additives. These hardenable compositions may be emplaced in an area open to the atmosphere and permitted to cure over a period of time to act as land fill or as road base materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.