Methods and apparatus for treating wastewater
US4136023A · kind A · utility
15Cited by
12References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1975 |
| Grant date | Jan 23, 1979 |
| Priority date | — |
| Expiry date | Jul 8, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W10/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention provides improved methods and apparatus for dissolving oxygen in wastewater treatment processes such as is required to satisfy the biological oxygen demand in the activated sludge process for the biodegradation of organic impurities. The invention enables attainment of high concentrations of dissolved oxygen with minimum consumption of oxygen and power. Wastewater with the high concentration of dissolved oxygen may be mixed with a larger volume of untreated wastewater to achieve the desired oxygen concentration and maintain volatile solids in suspension in the bulk liquid for optimum efficiency of purification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.