C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/2
C02F 11/02 (2006.01) C02F 3/12 (2006.01)
Patent
CA 2010156
The process for the disinfection and aerobic stabilization of concentrated sewage sludge in several steps, comprising one or more heat-insulated containers, preferably with stirring, with the addition of an oxygen-containing gas, is carried out by that a) the sludge coming in and having been concentrated to at least 2% of dry matter is brought to reach the thermophilic temperature range of >50 °C, if required with pre-heating, 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 from 50 °C to 55 °C for at least 20 hours or at >55 °C for at least 10 hours, and c) the sludge is stabilized to be mesophilic by way of actively cooling it down to from 25 °C to 45 °C and a further aerobic degradation within from 2 to 8 days, and preferably within from 3 to 5 days.
Fuchs Leonhard
Fuchs Martin
Fuchs Leonhard
Fuchs Martin
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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