超微曝气快速去除黑臭水体中嗅味物质的研究

Research on the Rapid Removal of Odorous Compounds in Black and Odorous Water by Micro-Nano Aeration

超微曝气作为一种新型曝气技术已应用在水体治理中,但其对于黑臭水体中嗅味物质的削减效果尚待深入研究。本研究采集某黑臭河水作为实验对象,通过比较鼓风曝气和超微曝气处理下水中嗅味物质二甲基三硫醚(DMTS)、二甲基异茨醇(2-MIB)含量变化探究不同曝气技术对嗅味物质的削减效果。鼓风曝气能有效削减水中嗅味物质浓度,曝气一天可削减DMTS含量66.67%;并可将2-MIB含量从103 ng/L降到20 ng/L,去除率达到80%。超微曝气0.5 h即可降低DMTS含量75%,曝气2 h削减率超过99%。超微曝气对2-MIB的削减效果也优于普通曝气,可将2-MIB含量降到低于检测限(<5ng/L)。实验结果显示超微曝气对嗅味物质的削减效果明显优于鼓风曝气,能够实现对黑臭水体嗅味的快速去除。

The purpose of the study is to explore the effect of micro-nano aeration on reducing odorous compounds in black and odorous water.In this study,black and odorous river water was collected as the experimental object,and the contents of odorous compounds-dimethyl trisulfide(DMTS)and 2-methylisotethanol(2-MIB)under the treatment of blast aeration and micro-nano aeration were compared.Blastaeration can effectively reduce the concentration of odorous compounds in water,the content of DMTS can be reduced by 66.67%in one day,the content of 2-MIB can be reduced from 103 ng/L to 20 n g/L,the removal rate reach 80%.Micro-nano aeration can reduce the content of DMTS by 75%in half an hour,and the reduction rate is over 99%in2 hours.The reduction effect of micro-nano aeration on 2-MIB is also better than that of blast aeration,and the 2-MIB content can be reduced below the detection limit(<5 ng/L).The reduction effect of micro-nano aeration on odor compounds is significantly better than that of blast aeration,and it can quickly remove the odor of water.