PSM Update: Screw-feed technology Screw-feed technology is the basis of a non-burn, dry thermal disinfection process in which waste is shredded and heated in a rotating auger. Continuously operated units, also called continuous feed augers, are commercially available and already in use in several hospitals. The principal steps of the process are the following: • The waste is shredded to particles about 25mm in diameter. • The waste enters the auger, which is heated to a temperature of 110– 140°C by oil circulating through its central shaft. • The waste rotates through the auger for about 20 minutes, after which the residues are compacted. The waste is reduced by 80% in volume and by 20–35% in weight. This process is suitable for treating infectious waste and sharps, but it should not be used to process pathological, cytotoxic, or radioactive waste.
Posted on: Fri, 09 May 2014 08:07:09 +0000
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