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.
