Study on the Performance of Ru Catalyst Based on the Treatment of Refractory Biodegrading Organic Wastewater

Abstract

Abstract Supported metal catalysts are widely used in the field of refractory biodegrading wastewater treatment because of their unique catalytic performance. The non-homogeneous CWAO process is used to treat the refractory biodegrading ceramic printing wastewater. The pH, decolorization rate and COD removal rate of water sample are used as the evaluation indexes of catalyst activity, and the metal dissolution concentration is used as the evaluation indexes of catalyst stability. Then the performance of the catalyst is evaluated comprehensively. As the reaction time goes on, decolorization rates of water samples with different groups of Ru catalyst increase. The decolorization rate of CWAO method for wastewater treatment reaches 80.4%, 78.3% and 76.7% respectively, indicating that the activity and stability of this catalyst are good. The overall trend of pH value of water sample from the first time, the second time and the third time is slightly higher, because generally printing and dyeing wastewater is alkaline, the higher the pH value of water sample indicates the lower the water sample treatment efficiency, that is, the catalyst catalytic efficiency has declined. From the first, second and third use sequence, the COD of water samples are all over 74.0%, and the COD removal rate is gradually reduced. The results show that the Ru-Fe-Co-Ce/FSC (ratio 2:0.5:0.5:3) catalyst has good catalytic activity and stability.