Method for treating waste, in particular household refuse, and unit for implementing same
US9943858B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 25, 2013 |
| Grant date | Apr 17, 2018 |
| Priority date | — |
| Expiry date | Aug 11, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/40
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a waste treatment method in which waste is subjected to a first screening process (4). The fraction of waste passing through the screening is subjected to a pre-fermentation treatment in a rotating tube (1) and the material leaving the pre-fermentation treatment tube is subjected to mixing in a mixing hopper, and, subsequently, to a methanization treatment in a digester (2). The organic materials are separated from the undesirable products in the material leaving the pre-fermentation treatment tube before it enters the digester. The digester (2) is horizontal and mechanically stirred, and a fraction of the digestate leaving the digester is recirculated at least in the mixing hopper, the recirculation rate being sufficiently high to ensure complete mixing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.