固定化硝化细菌对氨氮的去除效果研究

Research on the Removal of Ammonia by Immobilized Nitrifying Bacteria

[目的]探讨固定化硝化细菌对氨氮的去除效果。[方法]采用海藻酸钠-CaCl2和PVA-硼酸法2种固定化方法对实验室富集的硝化细菌进行了固定化,并优化了采用海藻酸钠-CaCl2制备的固定化硝化细菌去除自配水体中氨氮的条件。[结果]海藻酸钠-CaCl2固定硝化细菌去除氨氮的优化条件为:温度30℃,pH 7.5～8.5,曝气速率6.5 L/min。在优化条件下,浓度为330.0 mg/L的自配水体经过7d处理后氨氮全部被去除,去除率接近100%。[结论]为污水处理研究提供了理论依据。

[Objective] The aim was to explore the removal of ammonia by immobilized nitrifying bacteria.[Method] The nitrifying bacteria enriched by the laboratory were immobilized by sodium alginate-calcium chloride and PVA-borate method.The experimental conditions of ammonia in synthetic water removed by using the nitrifying bacteria immobilized by sodium alginate-calcium chloride were optimized.[Result] The optimum conditions for the removal of ammonia by immobilized nitrifying bacteria were temperature 30 ℃,pH 7.5-8.5 and aeration rate 6.5 L/min.Under above optimum conditions,the ammonia with initial concentration of 330.0 mg/L in the synthetic water was removed completely after seven days,and the removal rate was close to 100%.[Conclusion] The research provides theoretical basis for the studies on wastewater treatment.