固定化硝化菌在不同温度下对氨氮的去除效能研究

Study on the Removal of Nitrogen from Wastewater Using Immobilized Nitrobacteria at Different Temperature

采用聚乙烯醇——硼酸包埋法固定经常温富集培养的含耐冷菌的硝化污泥,用于处理常温和低温生活污水,进行了比较研究。结果表明,该固定化硝化菌群在常温下经过一个月的活性恢复和增殖后,转入低温环境,在短期内表现出一定的适应性,作用6 h后对NH4-N的去除率为80%左右。在常温下,该固定化菌更表现出高效的氨氮去除能力,作用3 h后,去除率达90%以上。可见,固定化硝化混合菌群经过常温活性增强和数量扩增后转入低温,对氨氮的去除是有利的,而且混合菌群中的低温菌仍能保持优势菌的地位。

Treatment of wastewater at different temperature using immobilized nitrobacteria which are cultivated at room temperature by the PVA - H3 BO3 method was studied. The results indicate that nitrifying bacteria entrapped can accommodate themselves at low temperature in short time by growth and activity for one month at room temperature. The removal rate of ammonia nitrogen after 6 h is about 80% at low temperature and above 90% after 3 h at room temperature. That is to say, it can help immobilized nitrobacteria remove nitrogen at low temperature after growth and activity at room temperature. Furthermore, psychrotrophs in the nitrobacteria can dominate in the process.