摘要
将人工脱氮菌剂分别与乙醇、乙酸钠、葡萄糖、白糖等组合应用,开展了对受NO3--N污染地下水的原位修复试验研究。结果表明,当采用乙醇、乙酸钠作为碳源时可对地下水中的NO3--N污染产生明显的去除效果,但由于地下水的自然渗流缓慢,导致投入物与地下水体的交换性能较差,对污染物的净化总量不大。对此可采取如下措施:在污染区中心至边缘的范围内实施人工抽水与注水,伴随注水按一定比例连续投加碳源,同时间歇投加人工脱氮菌剂。经此改进后可大大改善所投加营养物与地下水体的交换性能,取得更好的污染治理效果。
An experimental study on in-site remediation of groundwater polluted by NO3^- - N was carried out by combining artificial nitrogen-removing bacteria with CH3CH2OH, CH3COONa, C6H12O6 and white sugar. The results show that when using CH3CH2OH and CH3COONa as carbon sources, NO3^- - N in groundwater can be effectively eliminated. However, due to the low seepage flow speed of groundwater, added substances often fail to completely mix with groundwater, which results in only a small quantity of decontaminated groundwater. For this, the following measures can be taken： Artificially pumping and injecting water in the range from the center of polluted area to its border; Continually adding the carbon source in certain proportion during injecting water; Intermittently adding artificial nitrogen-removing bacteria. The mixing of added nutrient substances with groundwater is greatly improved after these measures are adopted, and the pollutant removal process consequently becomes more effective.
出处
《中国给水排水》
CAS
CSCD
北大核心
2007年第11期8-12,共5页
China Water & Wastewater
基金
国家高技术应用部门发展项目
关键词
NO3^-
-N污染
地下水
原位修复
脱氮微生物
碳源
动力作用
nitrate pollution
groundwater
in-site remediation
denitrifying microorganism
carbon source
dynamical effect
