The “azotopure” process for treating nitrogen-deficient aqueous wastes
✍ Scribed by Robert K. Finn; Alex L. Tannahill
- Publisher
- John Wiley and Sons
- Year
- 1973
- Tongue
- English
- Weight
- 280 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0006-3592
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Many chemical and food processing wastes are deficient in nitrogen, and must therefore be supplemented with domestic sewage or ammonia to dispose of them by conventional biological treatment. A more economical treatment, especially of strong wastes, is possible by maintaining a semipure culture of nitrogen‐fixing bacteria in a stirred aerated tank. When operated as a chemostat with 4 to 6 hr detention time, removal of 85% of the COD is possible in a single step without the need for clarifiers or digesters. A clarified effluent could also be produced by flotation or sedimentation of the flocculated bacteria. In that case there would be 99% removal of COD and a reduction in the amount of sludge by two‐thirds over the conventional activated sludge process.