生物反硝化墙去除地下水中硝酸盐的研究  

Nitrate removal from groundwater by a denitrification wall

作　　者：邢林[1] 汪家权[1] 

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2008年第10期1561-1564,1568,共5页Journal of Hefei University of Technology：Natural Science

摘　　要：文章采用室内实验装置,研究了以棉花为碳源的反硝化墙去除地下水中的硝酸盐。结果表明,以棉花为碳源的反应墙启动快。在室温（26±2）℃,墙内停留时间为7.5 h下,对于进墙NO3--N质量浓度分布在11.26～22.42 mg N/L,氮去除率可以达到95%,且没有明显的NO2--N,进墙NO3--N提高到33.23 mg N/L时,氮去除率依然约在90%,但有NO2--N累积。实验期间NH4＋-N产量较少,经过反应墙后pH明显下降。实验表明,棉花反硝化墙是一种价格低廉而有效的去除地下水中硝酸根的方式,棉花在反应过程中也被消耗掉了。Removal of nitrate from groundwater is studied in a laboratory chest packed with 1 kg unprocessed cotton which was mixed with rubble to form a denitrification wall. The results suggest that the startup of the reactor was fast. At the temperature of （26±2）℃. the wall continuously removed more than 95% of the incoming nitrate in groundwater ranging from 11.26 to 22.42 mg N/L and no nitrite was detected as the HRT was 7.5h When the incoming nitrate was increased to 33. 23 mg N/L, the rate of nitrate removal was about 90%, but it led to the accumulation of nitrite. The amount of ammonia was few during the research. The pH was decreased in evidence after the treatment of the dentrification wall. The results suggest that denitrification walls amended with cotton can be an inexpensive and available tool for removing nitrate from groundwater. The cotton was consumed in the process.

关 键 词：反硝化 棉花 地下水 硝酸盐 

分 类 号：X523[环境科学与工程—环境工程]