The exhaust Chrome tanning baths still contains an important amount of dissolved trivalent Chrome that has not fixed on leather: it generally represents the 15-25% of the total quantity of Basic Chrome Sulphate used for tanning.
The Chrome recovery plants designed and manufactured by Italprogetti, allow the recovery of the unfixed chrome, in order to reuse it in process, with considerable benefits both from an environmental and economic point of view.
The Chrome recovery allows to significantly reduce its concentration in tannery waste water, making it much easier to reach the discharge limits for the effluents. In addition, the contamination with Chromium of the sludge generated by the treatment plant diminishes drastically and its disposal becomes easier and cheaper.
The Chrome recovery leads also to an overall reduction of the consumption of Chromium Basic Sulphate and hence to a considerable economic saving on its purchasing.
A deep knowledge of the technical solutions and of technologies developed in over 30 years of activity has allowed Italprogetti to design and produce tens of chromium recovery plants, both for individual and for consortia tanneries.
