MODULE 4 - CLEAN TECHNOLOGY IN THE BEAMHOUSE / TANYARD
Students need to fully grasp the concepts covered in Module 1 in order to fully understand Module 4.
This module covers the clean technology that can be used by the tanner in the beamhouse and tanyard, the processes used, the chemistry or biochemistry of the clean technology processes, the function of the chemicals used in the processes, equipment modifications that may be necessary in order to use the clean technology processes, as well as the advantages and disadvantages of the clean technology processes.
The following are covered in this module:
Processing of green hides
Salt-free curing methods
Environment-friendly degreasers (NPE-free)
Recycling of soak floats
Recycling of lime liquors
Organic acid deliming
Carbon dioxide deliming
Recycling of pickle liquors
Chrome liquor recycling
High-uptake chrome tanning
High-end pH basification
In order to fully understand the above processes, students need to understand the concepts such as COD, BOD, conductivity, total solids, TDS, SS, TKN, sulphide, chlorides, FOG, shrinkage temperature, chromium concentration in the effluent etc