摘要
近年来生活污水常检测出含诺氟沙星(NOR)而引起广泛关注,为了探寻含NOR生活污水对人工快渗系统(CRI)处理污水性能的影响,考察了不同NOR进水浓度下CRI系统出水中的化学需氧量(COD)、氨氮、总氮等浓度和脱氮菌的空间分布特征。试验结果表明,进水NOR浓度在300μg/L以下时,CRI系统对总氮的去除效果随浓度升高而升高,最终去除率较不含NOR系统升高了2.03%。但对COD、氨氮的去除效果是降低的,最终比不含NOR系统分别降低了3.34%、2.71%。进水NOR浓度超过300μg/L后,系统去除COD、氨氮、总氮的效率下降明显,分别较不含NOR系统下降了19.44%、17.90%、4.04%。NOR浓度对反硝化菌(DNB)的抑制作用强于硝化细菌,对亚硝酸盐氧化菌(NOB)的抑制作用强于氨氧化菌(AOB)。初步证明处理含NOR浓度为300μg/L以下的生活污水对CRI系统无较大的影响。
In recent years, domestic sewage has been detected to contain norfloxacin (NOR) and has caused widespread concern. In order to explore the effect of NOR domestic sewage on the performance of sewage treatment by constructed rapid infiltration (CRI), the concentration of COD,NH + 4-N,TN and the distribution of denitrifying bacteria in the effluent of the CRI system under different concentration of NOR influent conditions were investigated. The results showed that when the NOR concentration in water is less than 300 μg/L, the removal of TN by CRI system increases with increasing NOR concentration, and the final removal rate is 2.03% higher than that without NOR. However, the removal efficiency of COD and NH + 4-N is reduced, compared with non-nor system, the processing efficiency decreased by 3.34% and 2.71%. When the influent concentration exceeds 300 μg/L, the removal efficiency of COD,NH + 4-N and TN in the system decreased significantly, which is 19.44%,17.90%and 4.04% lower than that without NOR. NOR concentration has stronger inhibitory effect on denitrifying bacteria(DNB)than nitrifying bacteria, and has stronger inhibitory effect on nitrite oxidizing bacteria(NOB) than ammonia oxidizing bacteria (AOB).It is preliminarily proved that the treatment of domestic sewage containing NOR concentration below 300 μg/L has no significant effect on the CRI system.
作者
王艺培
陈佼
张建强
方宇潇
WANG Yi-pei;CHEN Jiao;ZHANG Jian-qiang;FANG Yu-xiao(Faculty of Geosciences & Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China;College of Architectural & Environmental Engineering, Chengdu Technological University, Chengdu 611730, China)
出处
《四川环境》
2019年第3期6-10,共5页
Sichuan Environment
基金
国家自然科学基金资助项目(41502333)
四川省环境污染防治重点研发项目(2017SZ0179)
四川省科技计划项目(2019JDRC0136)
成都市科技惠民技术研发项目(2015-HM01-00333-SF)
关键词
诺氟沙星
人工快渗系统
处理性能
生活污水
Norfloxacin
constructed rapid infiltration system
treatment performance
domestic sewage
