Method for treating raw sludge including a simultaneous or pulsed aerobic/anoxic digestion process
US7833415B2 · kind B2 · utility
2Cited by
31References
15Claims
0Family size
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Key dates
| Filing date | Oct 25, 2006 |
| Grant date | Nov 16, 2010 |
| Priority date | — |
| Expiry date | Apr 4, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W10/20
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An improved process for sludge treatment includes anaerobic digestion followed by post-mesophilic aerobic and/or anoxic digestion. The first anaerobic step may be performed under either mesophilic or thermophilic conditions. The subsequent aerobic/anoxic digestion may be performed using either simultaneous, sequential or pulsed aerobic and anoxic conditions. An apparatus for performing the improved sludge treatment may be one digester for performing the anaerobic followed by aerobic/anoxic digestion. Alternatively, the system for performing the improved sludge treatment techniques may be at least two digest reactors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.