Author(s): Domenica Mosca Angelucci; Maria Concetta Tomei
Linked Author(s): Maria Concetta Tomei
Keywords: Industrial wastewater reuse Reactive dyes Sorption Polymer biological regeneration Polymer reuse
Abstract: The textile industry generates substantial aqueous emissions containing persistent pollutants, notably dyes, which are resistant to biodegradation and are scarcely removed by conventional treatment plants. Therefore, implementing effective wastewater treatment and reuse within textile factories, contributes to a cleaner, more production route that supports water conservation, reduces environmental pollution, and aligns with multiple SDGs for a more sustainable industry. This study investigates an innovative two-stage process for the decolorization of textile wastewater containing reactive azo dye Remazol Red (RR). The process integrates an initial extraction phase using absorptive polymer (Hytrel 8206), followed by polymer biological regeneration in a two-phase partitioning bioreactor (TPPB). Experimental tests assessed the sorption-desorption kinetics of RR onto polymer beads and explored the polymer bioregeneration efficiency of anaerobic-aerobic sequential processes. Sorption efficiency reached values up to 99% in a range of polymer-to-water ratios, pH levels, and initial dye concentrations. Results demonstrated effective dye desorption from polymer particles and revealed that the anaerobic-aerobic bioregeneration is an excellent option to regenerate RR loaded polymer. This two-stage process shows promise for efficient, onsite dye removal and polymer regeneration for reuse in textile wastewater treatment.
Year: 2025