In the article “Textile wastewater treatment by AOPs for brine
reuse,” discussed an experiment that was conducted to figure out what is the
best treatment method for implementation in textile wastewater treatment.  The researches selected the most contaminated
textile wastewater stream to undergo a dedicated treatment by advanced
oxidation processes.  The researchers
dyed the discharge with a high residual salt content.  This type of wastewater is a big
issue from an environmental point of view. High concentrations of residual NaCl
remain in textile wastewater stream after dyeing operations.  In the study, the AOP treatment was
investigated for dyes in a simulated mixture based on an industrial dyeing
recipe. This was a preliminary study to prepare the system of purification and
recycling of the brine from textile wastewater. 
Four AOPs have been investigated: O3, O3/H2O2, O3/UV and O3/UV/H2O2 . In
the case of the O3/H2O2 and O3/UV/H2O2 processes, hydrogen peroxide was added
to the reaction mixture before the ozone was applied.   There were three variants: aqueous solutions
with a single dye, aqueous solutions with a mixture of the dyes and simulated
wastewater based on industrial recipe. 
Based on the results the scientists concluded that ozonation resulted in
fast decolourization followed by further decomposition of by-products.  In the treatment of some textile wastewater
stream, such as dyeing discharge, a customized method can be economically
reasonable for industrial applications. When research is focused on industrial
implementation it is highly recommended to consider the conditions of real
textile wastewaters.