优势硝化细菌的筛选及其发酵条件的研究

Advantage nitrobacteria screening and its fermentation conditions

将焦化废水生化处理站好氧池的活性污泥进行驯化后,从中分离纯化得到两株硝化细菌,X1和X2,通过对比实验得到X2为优势硝化细菌.在以白糖为碳源,接种量为30%,起始NH4＋-N 255.2 mg/L,pH为7.5左右,温度30℃和连续曝气24 h后,NH4＋-N的去除率高达93.1%。经实验得到其最佳生物去除NH4＋-N的温度为25~30℃,pH为8.0.

Two nitrobaeteria after separation and purifieation were numbered X1 and X2 from the activated sludge after the domestication which came from the coking wastewater chemical and biological treatment station aerobic tank. By comparing experiment, X2 denitrfying bacteria was found to be an advantageous one. Under the following conditions： In the white sugar for the electron donor; inoculum 30% initial NH4^＋ -N255. 2 mg/L;pH7.5＋;temperature 30℃ and after 24 h aeration in a row, the removal rate of NH4^＋ -N was as high as 92.2 percent. The optimal experiment conditions for the best biological removal rate of NH4^＋ -N are temperature 25-30℃, pH 8.0.