沸石滤料曝气生物滤池启动性能研究

沸石滤料曝气生物滤池 (ZBAF)对氨氮的去除包括生物硝化和离子交换两种作用。中试装置启动试验表明 ,初期对氨氮的去除以离子交换作用为主 ,末期以硝化作用为主 ,不能以氨氮总去除率达到稳定作为启动过程结束的标志 ,而应以氨氮硝化去除率达到稳定作为标志。沿程试验表明 ,硝化细菌对沸石的“生物再生功能” ,实质是已被沸石交换的氨氮被水中浓度较大的其他阳离子交换下来后 ,被硝化菌所利用的现象 ;沸石表面有生物膜时 ,仍具有交换氨氮能力

Characteristics of zeolite media biological aerated filter during start-up

The removal of ammonia in a zeolite media biological aerated filter (ZBAF) includes two types of reactions: nitrification and ion exchange. The start-up of a pilot scale ZBAF in this study showed that ion exchange was the major contributor to ammonia-nitrogen removal at the beginning, and nitrification reaction played the main role in the end. The end of the start-up phase was signaled by that nitrification attained stable state not by the total ammonia removal rate. The parameters profile along the depth of ZBAF showed that "biological regeneration" was essentially processed as that the desorbed ammonia from zeolite was utilized by nitrifiers. The experiment also showed that zeolite was still capable of exchanging the ammonia in liquid after having biofilm attached on its surface.