Division 7
United Kingdom
In order to reduce the pollutant load in the waste water before effluent treatment arising from the post-tanning process steps, BAT is to use an appropriate combination of the techniques given below.
| Technique | Description | Applicability | |
|---|---|---|---|
| a | The use of short floats | Short floats are reduced amounts of process water. When less water is present, the quantity of process chemicals which is discarded unreacted is reduced. | This technique cannot be applied in the dyeing process step and for the processing of calfskins. Applicability is also limited to:
|
| b | Optimisation of retanning, dyeing, and fatliquoring | Optimisation of process parameters to ensure the maximum uptake of process chemicals. | Generally applicable. |