Assessment of the best available wastewater management techniques for a textile mill: cost and benefit analysis

摘要

In the present study, several water recovery and end-of-pipe wastewater treatment alternativesnwere evaluated towards the evaluation of Best Available Techniques (BATs) for the managementnof wastewaters from a denim textile mill in accordance with the European Union’s IntegratednPollution Prevention and Control (IPPC) Directive. For this purpose, an assessment that translatesnthe key environmental aspects into a quantitative measure of environmental performance andnalso financial analysis was performed for each of the alternatives. The alternatives considerednfor water recovery from dyeing wastewaters were nanofiltration (NF) with coagulation and/ornmicrofiltration (MF) pre-treatment, ozonation or peroxone and Fenton oxidation. On the othernhand, for the end-of-pipe treatment of the mill’s mixed wastewater, ozonation, Fenton oxidation,nmembrane bioreactor (MBR) and activated sludge (AS) process followed by membrane filtrationntechnologies were evaluated. The results have indicated that membrane filtration processnwith the least environmental impacts is the BAT for water recovery. On the other side,nMBR technology has appeared as the BAT for the end-of-pipe treatment of the mill’s mixednwastewater. A technical and financial comparison of these two BAT alternatives revealed thatnwater recovery via membrane filtration from dyeing wastewaters is selected as the BAT fornthe water and wastewater management in the mill.