Study of the application of a self-made ultrafine grinding catalytic internal electrolytic filler in pulping wastewater pretreatment

A pilot scale experiment was conducted to investigate the characteristics and factors that influence contaminant removal in a pulping wastewater pretreatment process, which was treated by a selfmade ultrafine grinding catalytic internal electrolytic filler. The powder metallurgy method was used to prepare the novel filler, with iron powder, graphite powder, copper powder and manganese powder as the raw materials. A comparative study conducted with commercial packing material under the same conditions showed that the self-made filler performed better than the commercial material regarding pollutant removal. CODCr and the chroma removal rate were used as evaluation indexes, and a single factor test and L27 (313) orthogonal test were utilized to obtain the optimum working conditions and interaction effects of each influencing factor. At the same time, using SEM to observe the surface morphology and structural change of the filler and analyzing the IR spectra of wastewater and sediment before and after the reaction, the reaction mechanism and organic degradation mechanism were discussed.