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Guidelines
for Wet Muck Out
THE
WET MUCK OUT/HYBRID SYSTEM
v) Sludge
Drying Unit
The purpose
of a sludge drying unit is to remove the water from the aeration
tank's settled sludge so that it may be more easily handled
and disposed of.
Sludge
from the aeration tank is approximately 98% water. There are
many types of sludge drying techniques such as heated evaporation,
natural drainage and evaporation, and mechanical dewatering.
Suppliers should be able to recommend the most appropriate
system for each individual farm and provide technical advice
on the operation and maintenance aspects.
One of
the simplest and more economical means of achieving sludge
drying is natural drainage and evaporation. This requires
a drying bed of sand with an underdrainage system. In general,
there should be at least 0.15m2 of drying bed area per porker
if a full wet muck out system is used. Less drying bed area
will be required for a hybrid system, the exact size depending
on the effectiveness of the dry muck out operation. The drained
water should be returned to the reception tank and the dried
sludge properly contained and disposed of in accordance with
the Code of Practice for Livestock Waste Management.
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