Process and apparatus for biologically treating waste waters
US4430224A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 1, 1981 |
| Grant date | Feb 7, 1984 |
| Priority date | — |
| Expiry date | Dec 1, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W10/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
In a process and apparatus for conducting an activated sludge process in an activation basin having multiple sections, preferably at least three sections are provided for conducting the process with each succeeding section being larger in volume than the previous section by an amount about equal to the volume of the first section. It is preferred that the process be conducted in the first section by feeding the first section with an oxygen enriched gas, and with the next section in line fed with the exhaust from the first section, and the third section being aerated with air. In a specific refinement, there are provided four sections with the first two sections sealed with respect to the atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.