摘要： 通过批次试验考察了实际工业有机废水的碳源性质和COD/NO₃^--N对硝酸盐还原途径的影响。研究结果表明，木薯酒糟中含有大量的大分子易发酵有机物（如碳水化合物和蛋白质等），更易发生异化硝酸盐还原为铵（DNRA）过程；而葡萄糖合成废水和木薯酒精废水厌氧出水中，硝酸盐还原途径主要是通过反硝化进行的。虽然基质不同，但COD/NO₃^--N对硝酸盐还原途径的影响却呈现出相同的规律，即随着COD/NO₃^--N增大，反硝化所占的比例逐渐减小，DNRA占的比重逐渐增大。

关键词: 碳源, COD/NO₃^--N, 反硝化, 异化硝酸盐还原为铵

Abstract: The influences of carbon source property and COD/NO₃^--N ratio in real industrial organic wastewater on nitrate reduction pathway has been investigated through patch tests. The results show that cassava lees contains a great number of macromolecular organic substances which can easily be fermented,such as carbohydrate,proteins,etc. Besides,the process of dissimilatory nitrate reduction to ammonium(DNRA) occurs more easily. The nitrate reduction pathway is implemented by denitrification,in the anaerobic effluent from glucose synthetic wastewater and cassava alcohol wastewater. Although their substrates are different,the influences of COD/NO₃^--N ratio on nitrate reduction pathway behaves according to the same rule. With the increase of COD/NO₃^--N ratio,the proportion of denitrification in nitrate is reduced gradually,but the specific weight of DNRA is increased gradually.

Key words: carbon source, COD/NO₃^--N ratio, denitrification, dissimilatory nitrate reduction to ammonium(DNRA)

中图分类号: 

• X703