Sewage treatment system and method
US5454949A · kind A · utility
9Cited by
5References
10Claims
0Family size
Inventors
Key dates
| Filing date | Jan 3, 1994 |
| Grant date | Oct 3, 1995 |
| Priority date | — |
| Expiry date | Jan 3, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W10/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The invention is directed to a sewage treatment system comprising a tank in which biological treatment by microorganisms occur in mixed liquor and a circulating loop for removing mixed liquor from the tank and returning oxygen enriched aerated mixed liquor to the tank. The mixed liquor is removed and returned to the tank through a pair spaced apart submerged filters. One alternative construction is to use a pressure tank in the circulation loop to increase the percentage of dissolved oxygen in the aerated mixed liquor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.