Abstract
Heterogeneous CWAO process was used to treat refractory organic waste-water. The performance of Pd-catalyst (Pd-Fe-Co-Ce/FSC) was investigated. The chroma and COD removal rate of waste-water were taken as evaluation indexes. The chroma of the blank water sample is about 300 times higher than that of the first, second and third waste-water. The first use is obviously much smaller than the second and third use, while the second and third use are not very different in chroma. With the decomposement of the organic matter, COD of waste-water decreased. Therefore, under the effect of Pd-catalysts, by the method of CWAO, waste-water can be processed effectively. From the first, second and third use sequence, COD value is from low to high, COD removal rate is gradually reduced slightly, so it can be seen that the treatment effect of catalyst on water sample is increased in 120 min. The experimental results show that the chroma of the treated water sample is about 300 times lower than that without catalyst, and the COD removal rates of the water sample are 85.7%, 83.8% and 82.1% respectively in the first, second and third time of catalyst. These show that the Pd-Fe-Co-Ce/FSC catalyst has good activity and stability.
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