Investigation of nitrification mechanism of biological activated carbon through analysis of nitrifying microorganisms and optimization of operational conditions

臭氧-生物活性炭（BAC）作为一种高级饮用水处理技术已得到广泛应用。然而，生物活性炭硝化等生物处理的机理尚不清楚。本研究对与BAC相关的氨氧化细菌（AOB）和古细菌（AOA）的丰度和多样性进行了研究。结果表明，氨氧化剂主要为AOA，而非AOB。此外，预氯化处理严重抑制AOA在BAC上的沉降。

Ozonation-biological activated carbon (BAC) has been widely used as an advanced drinking water treatment. However, mechanism of biological treatment such as nitrification in biological activated carbon remains unknown. In this study, we investigated abundance and diversity of ammonia-oxidizing bacteria (AOB) and archaea (AOA) associated with BAC. The results indicated that dominant ammonia-oxidizers are AOA, not AOB. In addition, pre-chlorination severely inhibit the settlement of AOA on BAC.