Treatment of wastewater from acrylonitrile-butadiene-styrene (ABS) resin manufacturing by Fe~0/GAC-ABFB

摘要

A feasible method for treatment of the wastewater from the ABS resin manufacturing process, based on combined Fe~0/GAC and aerated biological fluidized bed (ABFB), was developed. Meanwhile the effect of operating temperature and HRT on the decomposition or transformation of main pollutants by Fe~0/GAC reactor was investigated in this study. On conditions of HRT 4 h and operating temperature 30 °C in Fe~0/GAC reactor, the COD removal efficiency and NH4 —N transformation efficiency were 30-45% and 50-60%, respectively. In addition, the lower temperature (e.g., 5 °C) would limit the activity and treatment efficiency of Fe~0/GAC reactor, while this reactor could recover its activity and obtain high COD removal efficiency at the higher operating temperature (e.g., 30 or 60 °C). The deep treatment of the effluent of Fe~0/GAC reactor was performed by ABFB reactor, and the COD removal efficiency reached 90-95%. The decomposition or transformation of the aromatic compounds and organic nitriles in ABS resin wastewater was analyzed by UV-vis and FTIR. The experimental results indicate that the Fe~0/GAC-ABFB system could perform a good treatment for the ABS resin wastewater and meet the discharge standard in China.