Biochemically enchanced thermophilic treatment process
US6036862A · kind A · utility
Inventor
Key dates
| Filing date | Aug 14, 1998 |
| Grant date | Mar 14, 2000 |
| Priority date | — |
| Expiry date | Aug 14, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W10/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The present invention provides a process and apparatus for autothermal aerobic thermophilic treatment of high strength and high temperature wastes. In accordance with the process of the present invention, waste material is injected into a reactor vessel having thermophilic microorganisms to form a volume of bulk liquid in the reactor vessel. An oxygen-containing gas is also injected into the reactor vessel in such manner as to transfer oxygen into the reactor bulk liquid for utilization by the thermophilic microorganisms in aerobic treatment of the waste material. The oxidation-reduction potential and temperature of the reactor bulk liquid are monitored and at least a selected one of the rate of injection of the oxygen-containing gas, the oxygen-transfer efficiency of the oxygen-containing gas and the volume of bulk liquid in the reactor are adjusted in response to the oxidation-reduction potential and temperature of the reactor bulk liquid to maintain the temperature of the reactor bulk liquid within a predetermined range. This allows the system to match the oxygen transfer to the oxygen demand for the system. In particularly preferred embodiments, other parameters such as pH, COD…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.