| 摘要 |
<p>The control of a fermentation unit which operates with a horizontal fermenter (4) in plug-flow mode is extremely difficult, in particular when a high proportion of dry matter is employed. Previously, influence was only exerted on the biogenic degradation in the fermenter by returning (2) a proportion of the digested material from the outlet (8) of the fermenter to the inlet (3) of the fermenter. According to the invention, the control method is now supplemented by measuring the pH and the dry matter content at various positions (21) of the fermenter (4) and, on the basis of this measurement, controlling the fermenter in such a way that the measured data lie within certain stipulated ranges. In addition, the pH and the dry matter content can be adjusted by feeding press water laden with methane bacteria from the digested material to inoculation sites (20) in the fermenter. <IMAGE></p> |
