In order to remove nitrate in groundwater for the rural drinking water,rice wine was used as carbon source for denitrification and simple sand barrels were used as devices in this study. Its aim was to examine the effect of dinitrification in the presences of different ethanol concentrations and rich oxygen. The experimental results indicated that the effect of nitrate removal was directly related to the ratio of C/N. When the ratio of C/N was greater than 1. 99,nitrate removal rate reached 99% and nitrite did not accumulate,but acetate accumulated obviously. When the ratio of C/N equaled to 0. 89,nitrate re-moval rate could reach 99%,but nitrite was significantly produced. When the ratio of C/N degraded to 0. 43,denitrification process was not complete. Dissolved oxygen with high initial concentration had no significant effect on denitrification as the higher C/N ratio was provided. The range of 0. 89 -1. 99 of C/N ratio appeared to be suitable. Because the device was easy built and the carbon source( i. e. rice wine)was easy obtained,this study may present a feasible and acceptable way to ex-situ remediate groundwater polluted by nitrate for the rural family.%为去除农村家庭饮用地下水中的硝酸盐，以农村自酿米酒为碳源，利用简易的沙桶装置开展了反硝化去除硝酸盐的实验，对比了不同乙醇浓度下的反硝化效果。实验结果表明，以沙桶为实验装置，自酿米酒为碳源，在家庭中异位反硝化去除抽取地下水中的硝酸盐方法是有效果，易操作的。硝酸盐的去除率和 C/N质量比有直接关系，当C/N质量比大于1.99时，硝酸盐去除率达99%，亚硝酸盐零积累，但易积累乙酸盐；当 C/N质量比为0.89时，硝酸盐去除率达99%，生成物亚硝酸盐浓度远高于国家饮用水限值（1 mg/L）；当C/N质量比为0.43时，反硝化过程不彻底，硝酸盐去除率不高，且易生成溶度较高的亚硝酸盐。溶解氧的存在不会对反硝化产生显著影响。米酒和硝酸盐之间的C/N最佳比例，宜大于本次实验的0.89，小于1.99，利用农村自酿米酒作为碳源去除地下水中硝酸盐是可行的。
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