电-生物耦合法对酸性红18染料废水处理效能的试验

Experiment of Efficiency of Bioelectrochemical Process for Acid Red 18 Dyeing Wastewater Treatment

采用电-生物耦合水解-好氧接触氧化法处理酸性红18染料废水,考察了电流密度对处理效能的影响。在水解反应器施加微电场,电-生物水解HRT为12 h,好氧接触氧化HRT为7.95 h,电流密度分别为0.024、0.048、0.071和0.095 m A/cm2。该方法对酸性红18染料废水的质量浓度、色度、COD都有较好的去除效果,对氨氮也有一定的去除效果,其去除率都随电流密度的提高而增加。结果表明当电流密度增加到0.095 m A/cm2时,对质量浓度、色度、COD和氨氮的处理效果最佳,此时电-生物系统对各指标的去除率分别为98.70%、95.67%、90.06%和53.15%。

The experiments of bioelectrochemical technology for Acid Red 18 dye wastewater were carried out in this paper. The effect of different current density on its treatment was explored. During the experiment,HRT of bioelectrochemical hydrolysis reactor was 12 h,HRT of biological contact oxidation reactor was 7. 95 h,and current densities were 0. 024,0. 048,0. 071 and 0. 095 mA/cm2 , respectively. The results show bioelectrochemical technology has good effects on removal of mass concentration,color,COD,and has a certain effect on removal of ammonia nitrogen. The removal rates gradually increased with the increase of current density. When current density increased to 0. 095 mA/cm2 ,there exists optimal treatment effect,and removal rates of mass concentration,color,COD and ammonia nitrogen are 98. 70%,95. 67%,90. 06% and 53. 15%,respectively.