利用米酒为碳源去除农村家庭饮用地下水中硝酸盐的现场试验研究

doi:10.11934/j.issn.1673-4831.2018.10.013

摘要/Abstract

摘要：

农村地区地下水硝酸盐污染给家庭饮用水安全带来了影响。为验证米酒作为反硝化碳源在去除饮用水硝酸盐实践中的可利用性，选取桂林市漓江东区白竹干村2个家庭作为试验点，抽取当地地下水作为试验用水，利用简易砂桶装置进行现场试验研究。结果表明，在农村家庭环境下，以碳氮比（C/N）为1.5~2.2投放米酒，地下水中硝酸盐的去除率可达100%，且具有良好的稳定性；总氮浓度明显下降，亚硝酸盐和氨氮积累不明显，未超过我国饮用水标准；乙酸盐含量因碳源过量而积累，同时总有机碳也略有增加，试验点出水pH值比进水大约提高0.8个单位。利用米酒作为碳源去除地下水中硝酸盐的处理方法对农村家庭保障饮用水安全具有显著的可实践价值。

关键词: 地下水, 硝酸盐, 米酒, 饮用水, 农村家庭

Abstract:

Nitrate is one of the most common pollutants in rural areas because of the excessive use of nitrogenous fertilizer and improper disposal of solid waste and domestic sewage. Groundwater polluted by nitrate have public influences on the safety of drinking water. In order to examine the availability of rice wine acted as carbon source in the practice of nitrate removal from drinking groundwater, in-situ tests with simple sand buckets at two family were carried out, located in the eastern area of Guilin City. In the tests, wine rice was used as a sole carbon source for nitrate removal, and local groundwater was used as influent. The results indicate that nitrate in the effluent can be almost completely removed by denitrification with good stability and the total nitrogen (TN) decreased significantly under the conditions of C/N ratio ranging from 1.5 to 2.2. The intermediates of denitrification including nitrite and ammonia nitrogen had no obvious accumulation. However, acetate and total organic carbon (TOC) may have more accumulation while excess rice wine used. The pH value of the effluent is about 0.8 higher than that of the influent. This study suggests that the method of nitrate removal associated with rice wine as carbon source has a significant practical value for rural families to ensure the safety of drinking water.

Key words: groundwater, nitrate, rice wine, drinking water, rural family

中图分类号:

X523

黄骏宇, 蒋亚萍, 陈余道, 程亚平. 利用米酒为碳源去除农村家庭饮用地下水中硝酸盐的现场试验研究[J]. 生态与农村环境学报, 2018, 34(10): 955-960.

HUANG Jun-yu, JIANG Ya-ping, CHEN Yu-dao, CHENG Ya-ping. An In-situ Test Study on Nitrate Removal From Drinking Groundwater for Rural Families by Using Rice Wine as Carbon Source[J]. Journal of Ecology and Rural Environment, 2018, 34(10): 955-960.

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