Process for the anaerobic decomposition of organic substrate
US4627917A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 1985 |
| Grant date | Dec 9, 1986 |
| Priority date | — |
| Expiry date | Apr 19, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
This invention relates to a process and device for anaerobic decomposition of organic substrate in which organic substrate to be treated is passed in a downflow mode through a reactor (1) having a filter bed therein as a carrier for settling microorganisms. The substrate treated in filter bed (3) is partially recycled by a recycle pipe 4 from the bottom to the top of reactor (1). Produced digester gas is drawn off by a gas outlet (9) at top of reactor (1). To maintain a high volume load and to achieve high operational stability, it is provided that a partial stream of substrate treated in filter bed (3) is passed in an upflow mode through a riser pipe (11) to effect further degradation of residuals and is drawn off at the top of reactor (1) by means an outlet (10) directly from the riser pipe (11).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.