(best examples and good practices) on household organic waste ...

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Picture 52.: Susteren sludge drying facility
The drier gives a water evaporation rate of approximately 8.300 kg/h <strong>and</strong> a
sludge output of 11.000 kg/hr.. The plant operates 7 days a week <strong>and</strong> 24
hours a day <strong>and</strong> the total material is (> 92 % DS).
The drying plant at Susteren works by conveying (7 m 3 /h max). The next
step is the heating of the sludge in a boiler before agitating the mixture to
breakdown large agglomerations <strong>and</strong> the removal of any metal
contaminants. Sludge is then transferred for drying with the help of an oil
heat exchanger (max 225 o C). Air is induced by two 85,000 m 3 /h fans
through the vat’s bottom lining plates, mixing air through the sludge which
has an average depth of 4-5m.
This process continues while dust <strong>and</strong> moisture is driven off through the
cyclone system which has an air stream performance of 59,000 m 3 /h. The
dust <strong>and</strong> air is sent back to the (FD) This gives a 60% secondary mix in the
vat. Sludge cooling is aided by the exhaust gas taken from the oil boiler to
bring sludge temperature down to below 40 o C.