| 摘要 |
<p>A process for the disinfection and aerobic stabilization of concentrated sewage sludge in several steps, using one or more heat-insulated containers, preferably with stirring, with the addition of an oxygen-containing gas, described wherein (a) the sludge coming in, having been concentrated to at least 2% of dry matter, is caused to reach the thermophilic temperature range of >50 DEG C., with pre-heating if required, and then solely by an aerobic degradation without supplying external heat within from 2 to 4 days, (b) the sludge is disinfected by further aerobic degradation without supplying external heat at about 50 DEG C. to 55 DEG C. for at least 20 hours or at >55 DEG C. for at least 10 hours, and (c) the sludge is stabilized to become mesophilic by way of actively cooling it down to about 25 DEG C. to 45 DEG C. and a further aerobic degradation within about 2 to 8 days, and preferably within from 3 to 5 days.</p> |
