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

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Picture 69.: Psitallia sewage sludge treatment facility<br />

(EYDAP.,2010)<br />

The drum drying system (DDS) provides today <strong>on</strong>e of the largest sewage-sludge<br />

drying capacity in all of Europe.<br />

Picture 70.: Drum Drying System<br />

(EYDAP.,2010)<br />

The process of drying starts after the sludge from the sewage treatment<br />

facility, enters the DDS system. The evaporati<strong>on</strong> capacity of the system is<br />

approximately 10,000 kg of water per hour <str<strong>on</strong>g>and</str<strong>on</strong>g> line while almost 350000 t<strong>on</strong>s of<br />

sludge can be treated in the plant every year. The dried sludge is used as a high<br />

calorific value fuel. heating of the plant is almost exclusively d<strong>on</strong>e with off-heat<br />

from a gas-turbine <str<strong>on</strong>g>and</str<strong>on</strong>g> the biogas produced in the sewage system. The final<br />

product is 90% dry. The offgas from the drying system is treated in a thermal<br />

post-treatment stati<strong>on</strong>, where odours <str<strong>on</strong>g>and</str<strong>on</strong>g> harmful substances are removed.<br />

(EYDAP.,2010)

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