Sand can be handled successfully either in
a scrape or flush system by developing handling
systems that allow for the sand-laden
manure to settle prior to the effluent entering
a lagoon. The abrasiveness and density of
sand create problems in handling the manure.
Manure weighs about 60 lb/cu ft,
whereas sand has a density of 120 lb/cu ft.
Sand-laden manure will have an approximate
density of 80 lb/cu ft, if 30% of the manure
is sand. Because sand is heavier, it will not
remain in suspension as long as manure and
settles rapidly. Many problems associated
with handling sand-laden manure can be
avoided if the solids are stored separately
from the effluent.
