摘要
以微纳米曝气为主要曝气方式,鼓风微孔曝气方式作对比,处理广西大学东校园景观湖湖水,考察微纳米曝气方式在污染景观水体中氧传质系数变化及其对污染物的去除效果。结果表明,对污染景观水体曝气过程中,微纳米曝气氧总体积传质系数高于鼓风微孔曝气,且与景观水的污染程度成负相关。微纳米曝气具有很好的氧传递性,平均气含率为1.09%。该曝气法对污染景观水体中多种污染物有良好的去除效果,实验结束时,微纳米曝气对化学需氧量(COD)、总磷(TP)、氨氮(NH_4^+-N)和总氮(TN)的去除率分别为67.59%、17.30%、70.20%和66.75%,水体中叶绿素a上升了14.03%,是一种有效改善景观水体水质的曝气方式。
The changes in the oxygen mass transfer coefficient and the effectiveness of pollutant removal using micro-nanometer aeration were investigated. Landscape lake water at the East Campus of Guangxi University was used and porous blower aeration was applied as the reference for the comparison. The results showed that the mass transfer coefficient of oxygen total volume in micro-nanometer aeration was higher than that of the microporous aeration blower,and there was a negative correlation between the level of pollution of the landscape water and the oxygen mass coefficient in the aeration process. The micro-nanometer aeration had a better oxygen transmissibility,with an average gas volume fraction of 1. 09%. The micro-nanometer aeration also resulted in the ideal removal rate for various pollutants in the contaminated landscape water,in which the removal rates for chemical oxygen demand（ COD）,total phosphorus（ TP）,ammonia nitrogen（ NH_4^＋-N）,and total nitrogen（ TN） were67. 6%,17. 3%,70. 2%,and 66. 7%,respectively. The percentage of chlorophyll a（ Chl-a） in the water increased by 14%. These results prove that the micro-nanometer aeration is an effective method to improve the quality of landscape water.
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第4期1755-1760,共6页
Chinese Journal of Environmental Engineering
基金
国家水体污染控制与治理科技重大专项(2009ZX07317-006-02)
广西自然科学基金资助项目(2013GXNSFAA019278)
南宁市科学研究与技术开发计划(20123112
20132303)
关键词
微纳米曝气
曝气方式
城市景观水体
氧传质速率
micro-nanometer aeration
aeration method
urban landscape water
volumetric oxygen transfer coefficient
