摘要：

碳源是影响脱氮效果的关键因素之一。在A/O-MBR中进行了葡萄糖、乙酸钠和厨余发酵液的脱氮性能对比。结果表明:3种碳源条件下反应器对NH₄⁺-N的去除率都较高, 达到98%以上;以葡萄糖为碳源时, 反硝化作用不够彻底, TN去除率只有60%,而乙酸钠和厨余发酵液的反硝化作用明显, TN去除率达到80%.通过批式实验得出, 葡萄糖的比反硝化速率最低, 乙酸钠和厨余发酵液的比反硝化速率较高, 且相当;同时, 葡萄糖的反硝化COD利用效率也比乙酸钠和厨余发酵液低, 说明其脱氮能力低于后两者。

关键词: 碳源, 脱氮, 厨余发酵液, 比反硝化速率

Abstract:

Carbon source is one of the most critical factors which have influence on nitrogen removing effect. In A/O-MBR, the nitrogen removing capacities of glucose, sodium acetate and fermented liquid of kitchen waste have been compared. The results show that the reactor has high effectiveness on their NH₄⁺-N removing rates, reaching 98% or more, under three kinds of carbon source conditions. When glucose used as a carbon source, its denitrification is not complete, whose TN removing rate is only 60%. But the denitrification effect of sodium acetate and fermented liquid of kitchen waste are obvious, whose TN removing rates are both 80%. The results from batch tests show that the speci- fic denitrification rate of glucose is the lowest, while specific denitrification rates of sodium acetate and fermented liquid of kitchen waste are higher and appropriate. The COD utilization rate of glucose denitfication is also lower than those of sodium acetate and fermented liquid, indicating that its denitrification capacity is lower than those of the latter two.

Key words: carbon source, nitrogen removal, fermented liquid of kitchen waste, specific denitrification rate (SDNR)

中图分类号: 

• X703