digestion, the most common methods of sludge stabilization. The
following should be considered when adding septage to the solids
a) Increased sludge volumes. The volume of sludges
will increase; therefore, the processes and equipment used for
handling the sludge should have the capacity to accommodate the
increased sludge quantities.
b) Foaming and odor problems. Foaming and odors are
common with aerobic digestion. The extent of foaming depends on
the amount of detergents present in the septage.
Receiving Station. In addition to the high
organic content, septage typically contains hair and other
stringy material, grit, and plastics. Also, the volume of
septage loads disposed of at treatment plants is highly variable.
Therefore, a septage receiving station with preliminary treatment
and storage and equalization capacity is highly recommended.
Receiving Station Description. The extent of
facilities necessary at a receiving station depends on the
quantity of septage received, the flows to the WWTP, the
preliminary treatment available at the plant, the type of septage
treatment used, and the WWTP processes. However, the primary
components in most receiving stations should include the
a) Dumping station
b) Screening facility
c) Grit removal system
d) Grinder pump (if screening and grit removal is not
f) Lift station
g) Odor control capability
Dumping Station. The purpose of the
station is to provide for the unloading of incoming
has been transported to the plant via tank trucks.
station should consist of a truck unloading pad(s),
an inlet hose
or a grate, and washdown hoses. In most cases, the