Reuse of Salt-Containing Dyeing Effluents by Means …
3
This procedure is in accordance with the “Reference Document on BAT for
the Textiles Industry” issued by the European Commission where it is recommended to collect and treat separately the effluents containing poorly biodegradables
compounds such as dyes [12].
The EC-UV treatment could be carried out with two different purposes: (1) to
remove colour to improve the subsequent wastewater treatment or (2) to remove
colour and reconstitute the effluent in order to reuse the treated effluent containing
salts in new dyeing processes. A general schema of the reuse process is shown in
Fig. 1.
The use of the EC-UV process to reuse implies a significant saving of water and
salt. The results obtained with the reuse of treated exhausted reactive dyebaths are
presented with respect to reference samples (dyed with the usual softened tap water).
In addition, the environmental benefits of the EC-UV system, both for colour removal
and for reuse, were evaluated through a Life Cycle Assessment (LCA) study.
Fig. 1 General schema of the reuse process applied to poorly biodegradable and saline effluents
of the textile industry
3
This procedure is in accordance with the “Reference Document on BAT for
the Textiles Industry” issued by the European Commission where it is recommended to collect and treat separately the effluents containing poorly biodegradables
compounds such as dyes [12].
The EC-UV treatment could be carried out with two different purposes: (1) to
remove colour to improve the subsequent wastewater treatment or (2) to remove
colour and reconstitute the effluent in order to reuse the treated effluent containing
salts in new dyeing processes. A general schema of the reuse process is shown in
Fig. 1.
The use of the EC-UV process to reuse implies a significant saving of water and
salt. The results obtained with the reuse of treated exhausted reactive dyebaths are
presented with respect to reference samples (dyed with the usual softened tap water).
In addition, the environmental benefits of the EC-UV system, both for colour removal
and for reuse, were evaluated through a Life Cycle Assessment (LCA) study.
Fig. 1 General schema of the reuse process applied to poorly biodegradable and saline effluents
of the textile industry