The developed wastewater produced in the production of printed circuit board(PCB)is a kind of wastewater with high organic matter content,complex composition and difficult to biochemical degradation.In this paper,the optimal reaction conditions were firstly obtained through single-factor experiments.The acidification reaction acidification pH=2.The conditions of iron-carbon micro-electrolysis:The iron-carbon mass ratio was 2,the dosage of the agent was 3 mg/100 mL,the reaction pH value was 2,and the reaction time was 30 minutes.Fenton oxidation reaction:The initial pH was 3,H2O2/Fe2+was 6,the dosage of H2O2 was 0.6 mL/100 mL,the reaction time was 90 minutes.Secondly,the wastewater was treated by acidifying-Iron-carbon micro-electrolysis-Fenton oxidation combined process,after the combined process,The CODCr concentration in wastewater was reduced from 5 320 mg/L to 432 mg/L,the removal rate reached about 91%,provided a basis for the pretreatment of wastewater in the factory.
维普
万方数据