| 摘要 |
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 methanisation 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. |
| 主权项 |
1. A process for treating waste, in particular household refuse, containing organic matter mixed with undesirable products, especially metals, mineral matter, plastics, and glass, according to which process;
the waste is subjected to a first sorting by screening (4), the fraction of waste passing through the screening is subjected to a prefermentation treatment in a rotating tube (1) with feed at one end and extraction at the other end, and the material leaving the prefermentation treatment tube is subjected to mixing in a mixing hopper, then to a mechanization treatment in a digester (2), wherein: the organic matter is separated from the undesirable products in the material leaving the prefermentation treatment tube before it enters the digester, the digester (2) is horizontal, mechanically stirred, and a fraction of the digestate leaving the digester is recirculated at least to the mixing hopper, the recirculation ratio being high enough to ensure complete mixing. |
