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Papermaking Middle-stage Effluent Treatment with Micro-electrolysis Method and its Mechanism

Xiao Xian-ying

Abstract

The micro-electrolysis method was applied to treat papermaking middle-stage effluent,the results of orthogonal experiment showed the optimum conditions:blowing air volume was 0.4 L/min,the weight ratio of iron to carbon was 2∶1,pH value was 3 and reaction time was 10 min.Scanning electron microscopy (SEM) and FTIR were employed to explore the surfaces of iron chips and analyze the deposit.The removal of color and COD_ Cr by micro-electrolysis method was compared to by flocculated with Fe 2+ from Fe/C in acidic water and directly with FeSO_4.These indicated the reactive mechanism of micro-electrolysis method,which involved oxidation-reduction ,flocculation,electro-enrichment,filtration-adsorption and so on.

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Key concepts: Electrolysis, Effluent, Papermaking, Adsorption, Flocculation, Filtration (mathematics), Scanning electron microscope, Chemistry