In this work we quantitatively studied the opportunities to improve the compaction of dried wastewater treatment sludges from tanneries, possibly combining with pelletization. Measurements of bulk density have been carried out at the industrial and laboratory scale, using different packing procedures, amenable to industrial processes. Waste as powder, pellets and their mixtures have been considered. Mixtures of powder and pellets is the best packing policy. The best compaction results was achieved by controlled vibration of a 30/70%wt mixture of powders and pellets, leading to a final bulk density of 1 t/m3, i.e. an improvement of compaction by more than 54% with respect to poured powders, but also larger than 35% compared to poured pellets. That means increasing the mass storage capacity by a factor of 1.56.
Improved storage and disposal of dried tannery sludges
DELLA ZASSA, MICOL;SANTOMASO, ANDREA CLAUDIO;CANU, PAOLO
2015
Abstract
In this work we quantitatively studied the opportunities to improve the compaction of dried wastewater treatment sludges from tanneries, possibly combining with pelletization. Measurements of bulk density have been carried out at the industrial and laboratory scale, using different packing procedures, amenable to industrial processes. Waste as powder, pellets and their mixtures have been considered. Mixtures of powder and pellets is the best packing policy. The best compaction results was achieved by controlled vibration of a 30/70%wt mixture of powders and pellets, leading to a final bulk density of 1 t/m3, i.e. an improvement of compaction by more than 54% with respect to poured powders, but also larger than 35% compared to poured pellets. That means increasing the mass storage capacity by a factor of 1.56.
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