摘要
采用海砂、校园土混合作为快滤介质构建人工土快滤系统用以处理生活污水,考察快滤系统对污染物特别是氮素的去除效果,并进一步优化设计快滤池结构,提高系统对总氮的去除效率。结果表明,系统具有良好的有机物、氨氮处理效果,去除率分别达到78%、92%,但总氮去除效率不理想,仅有33.4%;有机物和氨氮的去除主要发生在系统上部40 cm土层中,总氮的去除和反硝化作用主要发生在系统下部60 cm土层中;土层下部设置长度为30 cm的饱水带人为增加了缺氧段长度,促进反硝化菌生长,使系统TN去除效率提高到64.8%。
A constructed rapid infiltration（ CRI） was developed to treat municipal wastewater with the mixture of sea sand and campus soil.The tests were conducted to investigate its pollutants＇ removal effects,especially nitrogen.The reactor structure was also optimized to enhance the total nitrogen removal.The results showed that CRI exhibited better removal effects on organic compound and ammonia nitrogen with the removal efficiency as 78% and 92% respectively; but the total nitrogen removal efficiency was only 33.4%; the COD and NH＋4-N removal were mainly focused on the upper 40-cm layer,whereas the total nitrogen removal and denitrification occured on the lower 60-cm layer of infiltration medium.Furthermore,the saturated zone with30 cm in length was set up to artificially increase the anoxic zone and enhance the activity of denitrifying bacteria,which could made the removal efficiency of total nitrogen reach 64.8%.
出处
《山东农业科学》
2016年第8期98-101,共4页
Shandong Agricultural Sciences
基金
烟台市科学技术发展计划项目(2005226)
关键词
人工土快滤
砂土混合物
饱水带
总氮
去除率
Constructed rapid infiltration
Mixture of sand and soil
Saturated zone
Total nitrogen
Removal efficiency
