Aerobic Sludge Digestion (ASD) can be used to
reduce waste sludge biosolids, in both secondary and primary
sludges. Oxy-Dep SD, an ASD process enhanced by the use of high
purity oxygen, allows the following:
partial disinfection and pathogen kill by operation
at thermophilic temperatures (45 - 65°C)
the production of a stable sludge with excellent
dewatering properties
much reduced digester retention times (and so
smaller digester volumes) compared with conventional aerated
ASD or anaerobic digestion
good process control to reduce odours, VOCs and
foam.
The process is used widely in municipal
and industrial sludge applications.
