Sache can be applied by either spray
or dip. For dip applications, adequate liquid agitation
must be provided with ultrasonics or similar devices.
Sache works best at 140-176°F (60-80°C) and
contact time is approximately 3 minutes in the main
spray chamber. Processing time and temperature may vary
depending upon the amount of soil to be removed.
Sache plants operate in counterflow cascade.
The number of spray chambers required varies depending upon
operational conditions and the amount of soil to be removed.
Oil skimmers or lamella separators should be installed to
remove mineral oils (free oils), while micro-filtration is
needed to remove emulsified oils. A condenser recovers the
chemicals for re-use in the process.