生物反硝化去除地下水中硝酸盐的混合碳源研究

选取麦秸、锯末、乙醇为碳源,比较了这3种物质单独或两两组合作为碳源的情况下,生物反硝化去除模拟地下水中硝酸盐的效果.结果表明,以麦秸为碳源的反应体系具有较好的反硝化效果,但反应器出水具有颜色和异味;锯末+乙醇作为混合碳源的反应体系比单独添加锯末或乙醇反应体系的脱氮效果好;碳氮比(C/N)为40的混合碳源用量有利于硝酸盐...

Biological denitrification for nitrate removal from groundwater using mixed carbon sources

Wheat straw, sawdust and ethanol were selected as carbon sources for denitrification microorganisms to remediate nitrate from groundwater. The effect of wheat straw, sawdust, ethanol, wheat straw+ethanol, sawdust+ethanol as well as wheat straw+sawdust as carbon sources to remove nitrate from the simulated groundwater were compared. The results showed that the reactor packed with wheat straw had good nitrate removal efficiency, but the effluent from the reactor was colored and had a bad odor. The reactor packed with sawdust +ethanol had a better performance than the reactor packed with sawdust or ethanol alone. The ratio of carbon and nitrogen (C/N) 40 was beneficial to nitrate removal. When using sawdust as carbon source, 0.5% ethanol (the percentage of ethanol to the amount of carbon sources) had a significant effect on improving denitrification.