超声波对制革废水曝气除S^(2-)的影响

The effects of ultrasound on sulfide removal of tannery effluent by aeration

研究了超声波对制革综合废水、浸灰废水催化曝气除 S2 -的影响。试验结果表明 ,在不改变现有曝气除硫工艺的条件下 ,施加超声波可提高催化曝气效率 ,缩短曝气时间 ;随着超声波处理时间的增加 ,S2 -的去除率逐渐增大 ,综合废水用超声波处理 30分钟后曝气 1.5小时 ,S2 -的去除率达 94 .6 % ,浸灰废水用超声波处理 2 0分钟后曝气 6小时 ,S2 -的去除率为 88.0 % ,分别比对比样高 2 6 .9%及 2 2 .5%

The investigations were based on sulfide removal of tannery waste lime liquor and effluent, using MnSO 4 as catalyst of aeration. The ultrasound of 23.7kHz and 600W was used to enhance the treatment. It was found that proper sonication leads to considerable increase of sulfide removal rate and decrease of aeration duration. For example,the removal rate of sulfide in effluent increased to 94.6% after treating with ultrasound for 30 min then aerating for 1.5 hour, compared to 67.7% without ultrasound. The same regulation was observed for waste lime liquor.