Low Temperature Conversion of Cr-containing tannery wastes and sludges

摘要

An extensive study was initiated at LGR in 1998 to investigate the thermal conversion of chrome leather wastes and sludges aiming at an avoidance of any Cr(Ⅵ) formation. The outcome from this detailed study shows that thermal treatment can reduce the volume of solids for deposit by a factor of approximately four and that formation of Cr(Ⅵ) can be avoided. In addition, a considerable amount of energy is made available in the form of a diesel-type fuel that may be used within the conversion process.