电催化氧化技术处理煤气化废水

采用电催化氧化技术处理煤气化废水一级生化出水,考察了pH值、槽电压、水力停留时间、曝气量对处理效果的影响,将实验条件优化得到其最佳反应条件为:进水pH值为6.0~6.5,槽电压取值为15 V,水力停留时间为2 h,曝气量为5 m3/(m2·h)。在此最优条件下,煤气化废水一级生化出水的COD去除效率达到80%,色度去除效率达到90%。这表明,电催化氧化技术能够降解废水中的有机组分,还能破坏其内部的发色基团,作为煤气化废水一级生化出水的深度处理方法效果显著,成本低廉,出水能达标排放。

Treatment of coal gasification wastewater by electro-catalytic oxidation

Electro-catalytic oxidation was used for treating the first biochemical treatment effluent of coal gasification wastewater.The influences of pH, voltage, HRT and aeration rate were all investigated,and the result showed that the optimal reaction conditions were pH of 6.0-6.5, voltage of 15 V,HRT of 2 h and aerationrate of 5 m3/(m2·h).Under these conditions,COD and color degree were removed effectively for 80%and 90%,respectively,which indicated that electro-catalytic oxidation can remove organic residues in the coal gasification wastewater and destroy the structure of chromophoric group.As the advanced treatment of coal gasification wastewater,it has remarkable effect,lower cost, and the effluent can reach the standard of discharging.