How to prepared slow release fertilizer from poultry manure:
Poultry manure collected
from a broiler chicken farm. The physical appearance of the manure is covered
by rice husk, which was added on the closed-house floor to reduce the odour
problem. A typical manure to rice husk ratio was 0.5 on a dry basis. The manure
is then sun dried, milled and sieved to produce poultry manure powder. The
powder was smell free and ready to be used for SRF preparation.
Slow release Fertiliser
preparation
The first SRF preparation is using screw extruder. Before
pelleting, the powder will mix with urea powder (urea : manure = 1 : 2) and
starch paste in a mixer. Starch paste will be prepared by heating starch
solution. The mixture dough then extruded to produce noodle-like long shape
mass. Then the extruded paste was sun dried and cut at about 1 cm length of
pellets. The pellet then oven dried to complete the drying step and stored in
an air tight container. For comparison, poultry manure pellet without urea
addition was also prepared in the same procedure as above.
The second method of SRF production is using pan granulator.
The poultry powder will be mixed with urea powder in the same ratio of the SRF
pellet, the powder mixture was placed inside the pan and rotated. During
rotation, a starch solution was spayed to produce a ball shape granule with the
diameter range of 0.5 to 1.0 cm. The SRF granule then oven dried and stored in
a sealed container.
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