优势菌对焦化废水中几种有机物降解特性的实验研究

Experimental Research on the Degradation of Organic Compounds in the Coking-Plant Wastewater by Superiority Bacteria

从焦化厂曝气池活性污泥和废水处理工艺出水中筛选出6株革兰氏阳性优势菌,根据菌株、菌落形态和大量生化实验将菌株鉴定到属.确定了降解所需的最佳实验条件.分别为温度30℃,转速100 r/min,菌株投加量20%(V(菌液)/V(废水)).实验发现,筛选出的6株优势菌对喹啉、吡啶和萘有良好的降解效果,但以喹啉为碳源和氮源筛选出来的H24,H26和H31对喹啉的去除率优于其他3株菌株,而以萘为唯一碳源的H14对萘的去除率优于其他菌种.6株优势菌的驯化活性污泥能进一步提高对喹啉、吡啶和萘的去除能力,去除率在90%以上.

Six Gram （ ＋ ） superiority bacteria were isolated from the active sludge of the Aeration Tank and from the outlet water of wastewater treatment process of coking-plants. The strains of microorganism were identified to different genera, according to bacteria morphology character and numeric biochemical tests. The optimal degradation temperature is confirmed as 30 ℃, while the rotating speed and strain dosage are 100 r/min and 20% respectively. The experimental results show that the six organisms can well degrade quinoline, naphthalin and pyridine. The quinoline-degrading bacteria H24, H26 and H31 have a better removal capability for quinoline, and the naphthalin-degrading bacterium H14 have a better removal capability for naphthalin. The active sludge domesticated by mixed superiority bacteria can improve the removal efficiency of quinoline, naphthalin and pyridine, and the removal efficiency is higher than 90%.