不同碳源对生物反硝化的影响

Influence of Different Carbon Sources on Denitrification

在悬浮污泥系统中，当ｐＨ、温度适宜，碳源无限制并采用单一类碳源时，反硝化速率和耗碳速率动力学呈零级反应。混合挥发性脂肪酸碳源的反硝化速率比组成它的单一脂肪酸的反硝化速率高。挥发性脂肪酸中，乙酸的反硝化速率最高。挥发酸的反硝化速率比相应的醇类为高。本文还讨论了降低反硝化系统碳源消耗、减少处理成本的方法。

n a suspended sludge system, the rat6s ofdenitrifiCation and carbon uptake can follow a zeroorder reaction when the carbon supply was from anunlimited,single kind of carbon source at a suitablePH and temperature. It was found that a mixedvolatile fatty acid (VFA) C-source resulted in ahigher rate of denitrifiCation than any of theindividual VFA C-sources which formed the mixedone. Of the VFAs,acetate gave the highest rate ofdenitrification. The VFAs gave a higher rate ofdenittification than their corresponding alcohols. Themeans of reduCing the carbon consumption and theCod of treatttient in a denitrification system had beenalSO discUSSed.