Sewage treatment method and apparatus
US4339265A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 27, 1980 |
| Grant date | Jul 13, 1982 |
| Priority date | — |
| Expiry date | Feb 27, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A40/20
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method and apparatus for treating sewage and converting the sewage into organic fertilizer which utilizes equipment for converting the solid material of the sewage into patties and a mixing apparatus for mixing the patties with bulking agents. The mixture of patties and bulking agents is stored in a pile and subjected to a supply of air to enhance the self-combustion or oxidation of the organic material in the patties. The bulking agents provide the patty-bulking agent mixture with air passages and pockets and minimize compaction of the patties. The self-combustion of the patties continues until the organic material is burned out, leaving a residual ash. A shaker separator having an elongated longitudinal perforated member is reciprocated to separate the ash from the bulking agents. The ash is collected and utilized as organic fertilizer. The bulking agents are recycled back to the mixing apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.