Method and apparatus for ammonia-nitrogen removal by vacuum desorption
US4093544A · kind A · utility
32Cited by
17References
29Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 12, 1976 |
| Grant date | Jun 6, 1978 |
| Priority date | — |
| Expiry date | Nov 12, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2101/16
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method and apparatus for removing ammonia nitrogen from wastewater at any given temperature. The apparatus and method includes the concept of increasing the pH of the wastewater to a highly basic condition, exposinng the wastewater to a vacuum having an absolute pressure at least approaching the vapor pressure of the wastewater proportional to the given temperature whereby ammonia gas is then desorbed from the wastewater, and subsequently absorbing the desorbed ammonia in a body of liquid having a pH substantially less than the highly basic condition of the original wastewater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.