| 摘要 |
<p>A process for the purification of effluents, more particularly communal sewage, and the treatment of the sludge, in which the raw effluent is fed into a high-load adsorption stage A followed by a low-load culturing stage B, and the surplus sludge from the adsorption stage and the culturing stage is pre-thickened and fed into a sludge treatment stage having at least one acidification reactor 6 having a solid-bed 7 and at least one a methane reactor 9, having a solid-bed 10 the merely thickened but not dewatered surplus sludge from the adsorption stage A and the undewatered surplus sludge from the low-load culturing stage B being subjected to a mechanical fines removal with the aid of a rake and/or screen 2b, the fines-free sludge mixture being made more fluid by pasteurisation heating 3 and acidification 6, and the fluidised sludge mixture being further treated in the solid-bed methane reactor 9 at a dry substance content exceeding 100 kg/m<3>. Cell digesting substances may be added to the fines free sludge (eg lysin). <IMAGE></p> |
