NUA-DAS生态滤池中氨氧化菌群特征及脱氮效果

研究酸中和残渣（NUA）和脱水铝污泥（DAS）生态滤池中脱氮效果及氨氧化菌群（AOB）特征。为了解内在驱动因子，对脱氮效果进一步探究，从多样性和相似度角度研究AOB菌群时空分布规律以及对滤料环境的适应效果。系统在运行稳定后，装置总出水中NH3-N、TN的平均去除率达到75%和70%。结果表明，装置在不同运行时间、不同位置均存在AOB，随着系统的运行稳定，多样性较初始滤料中都有所增加。2种滤料都能够为AOB提供很好的生长环境，并且在pH显中性的DAS滤料中更加适合于AOB的生存繁殖。

Characteristics of ammonia-oxidizing bacteria and effect of nitrogen removal for wastewater treatment using NUA-DAS ecofilter

The nitrogen removal mechanism and characteristics of ammonia-oxidizing bacteria (AOB) in filter media were investigated using an NUA-DAS (neutralized used acid-dewatered alum sludge)ecofilter for synthetic livestock wastewater treatment. Temporal-spatial distribution of AOB in the DAS and NUA was determined, to increase understanding of the nitrogen removal mechanism. When the system was stable, the average removal rates of NH3-N and TN in livestock sewage treatment were 75% and 80%, respectively. Results of the biological analysis showed that AOB were present in all filter materials, and the diversity of the AOB was higher in the NUA and DAS when compared to the initial media. Both filter materials provided a good environment for the AOB, although the DAS was more suitable for the growth of the microorganisms than the NUA was because of its neutral pH.