| 摘要 |
<p>The invention relates to a method for treating waste, particularly household refuse, containing organic materials mixed with undesirable products, in particular metals, mineral materials, plastics, glass. According to the method, 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 tube (1) is subjected to a methanisation treatment in a digester (2). The waste, as collected and without preliminary shredding, is subjected to a first screening process (4) using a screen of mesh size L1. Following said screening process, the fraction of waste is sent for treatment in the rotating tube (1). The rotating tube is supplied with waste regularly over time. The retention time (T) of the waste in the rotating tube is substantially constant and at least equal to the time required for almost all of the organic material to be of a particle size fraction smaller than that of the undesirable products. Upon leaving the rotating tube, and before entering the digester, the waste is subjected to screening (9) using a screen of mesh size L2, ensuring that the organic materials of a finer particle size are separated from the undesirable products.</p> |
