INTEGRATION OF NANOFILTRATION AND BIOLOGICAL PROCESSES FOR TEXTILE WASTEWATER TREATMENT

The implementation of the biological anaerobic-aerobic system in separated reactors to the nanofiltration concentrate treatment was presented. The concentrate was obtained during the nanofiltration of the textile wastewater containing azo dye Reactive Red 120. The. experiments were conducted on the wastewater concentrated from 2 to 10 times. The concentration factors had no significant influence either on the decolourization of the azo dye in the anaerobic reactor or on the orthanilic acid degradation in the aerobic one. However, the higher the concentration factor was achieved, the more products of the dye decolourization were formed and the higher COD values in the outflow of the system were observed.