WASTE MANAGEMENT IN LEATHER INDUSTRY

60 73Table 8.4 Mass balance of the tanning processThe primary concern of tanners and environmental protection authorities alikeis the chrome balance. A typical distribution for a conventional main tanningprocess is shown in Table 8.5Table 8.5 Chrome balance of the main tanning processInput: % and kg/ 1100 kg limed pelt weight; Output: kgThe composition of the resulting wet blue reflects the change the pelt hasundergone during the chrome tanning process. Composition of pelt, wet bluegrain leather and wet blue split leather is shown in Figure 8.5.