|
Premium Standard Farms
Valley View Operation
Crystal Peak Fertilizer Plant
Sullivan County, Missouri
 Premium
Standard Farms selected Roberts & Schaefer for the construction
of a bio-solids recovery system at their Valley View operation.
Raw hog manure is concentrated from 14 eight barn sites and acid
stabilized. The solids are pumped to an anaerobic digester. This
innovative process converts hog manure into a high value commercial
fertilizer, eliminating the problems with traditional anaerobic
lagoon processing and provides its own energy for fertilizer drying.
Anaerobic digestion will take place in a synthetically lined
basin with a bio-gas collection system. The bio gas is collected
and used for heat in the drying/pelletizing system. The digested
slurry is pumped to a liquid/solid separation circuit used to
produce a wet centrifuge cake and clarified liquor. The clarified
liquor is stabilized and pumped to a Freeze/Thaw Evaporation (FTE)
system. The FTE system consists of a converted existing lagoon
to store the brine until freezing weather conditions occur. The
brine is then pumped to a ten acre FT field where the liquid separation
occurs. A stronger concentration of nutrients is created as well
as a clean water fraction. The concentrate is either further concentrated
through the smaller three acre ice field or is sent to be mixed
with the centrifuge cake product and granulated into a fertilizer
pellet in a proprietary granulation plant. The finished product
is temporarily stored on site and then transported off site and
sold into the wholesale market.
The clean water, with a large percentage of the nitrogen removed,
is either re-fed to the animals or irrigated on the surrounding
fields through the existing underground force main system.
|
