Sodium acetate, glycerol, ethanol and glucose were applied as carbon source respectively to investigate the effect of different carbon sources on shortcut nitrification-denitrification in the salinity wastewater in SBR. The results showed when sodium acetate was used as carbon source,short-cut nitrification and denitrification of SBR can be achieved by gradually increasing the NaCl concentration,and the removal efficiency of total nitrogen was higher than 95%. When NaCl concentration was 14. 2 g/L,using sodium acetate,glycerol, ethanol and glucose as carbon source respectively, the corresponding accumulation rate of nitrite in SBR were 98. 7%,86. 5% ,58. 9% and 54. 6%. So,sodium acetate and glycerol were better carbon source for short-cut nitrification and denitrification process. The theory carbon demand and C/N were 48 g/d and 1. 03 respectively, while the actual carbon demand and C/N was respectively 2. 6 times and 2. 3 times of theory carbon demand and theory C/N because of the inhibition effect of salinity to denitrifying bacteria. Complete denitrification of oxidation-reduction potential (ORP) of sodium acetate, glycerol, ethanol and glucose were -382, - 394,-403,-427 mV,respectively. The denitrification process was well fitted by zero-order kinetic equations when carbon source was sufficient.%分别采用醋酸钠、甘油、乙醇和葡萄糖作为外加碳源,研究不同碳源对含盐废水短程硝化反硝化的影响.结果表明:(1)利用醋酸钠作为碳源,逐步增加NaCl盐度可以实现短程硝化反硝化,TN平均去除率高于95％.当NaCl盐度为14.2 g/L时,采用醋酸钠、甘油、乙醇和葡萄糖作为碳源时,NO2- -N的累积率分别为98.7％、86.5％、58.9％和54.6％.醋酸钠和甘油作为碳源,实现短程硝化反硝化效果较好.(2)采用不同碳源时,实现反硝化所需理论需碳量和理论C/N平均分别为48 g/d和1.03(摩尔比,下同)；由于反硝化菌受到盐度的抑制,实际C/N约为理论C/N的2.3倍,实际需碳量约为理论需碳量的2.6倍.(3)醋酸钠、甘油、乙醇和葡萄糖完全反硝化氧化还原电位( ORP)分别为-382、-394、-403、-427mV.当反硝化过程中碳源充足,反硝化表现为零级动力学方程.
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