以天然斜发沸石粉为主要原料,水泥为粘结剂,铝粉为造孔剂通过优化实验制备出沸石加气混凝土生物填料(ZPBF),并利用偏光显微镜(PM)、扫描电子显微镜(SEM)等技术来表征ZPBF孔结构特征.结果表明:ZPBF开放孔隙率达到29.55%,为微生物进入ZPBF的内部附着生长提供空间.BET-N2吸附测得介孔孔径平均11.92nm,比表面积59.54m2/g,有利于离子交换吸附.ZPBF装填实验柱挂膜成熟后,以模拟含NH4+-N废水进行离子交换吸附、排空、鼓风微生物硝化再生、淋洗硝酸盐四阶段序批式运行,当离子交换吸附阶段HRT为2.8h,进水NH4+-N浓度10mg/L,以出水NH4+-N浓度1.5mg/L为穿透点,可吸附NH4+-N运行5d,鼓风24h可完成再生,NH4+-N平均去除率达到87%,TN平均去除率达到60%,出水达到北京城镇污水处理厂水污染物排放标准一级B.%Zeolite porous biological filter (ZPBF) was prepared using mixed cement, raw zeolite, and aluminum powder through optimization experiment and used as a novel filter medium in biological aerated filter (BAF). The properties of the ZPBF were analyzed by scanning electron microscopy (SEM), and porosimetry. The results show that ZPBF has a large BET-N2(59.54m2/g) and average pore diameter (11.92nm) as well as a high porosity (29.55%). In addition, the uniform and interconnected pores in ZPBF made it suitable for the microbial growth. In order to prove the feasibility of the use of ZPBF in BAF, ZPBF used in the BAF were investigated for city wastewater treatment. Thus, intermittent dynamic experiments were conducted, the intermittent operation cycle included adsorption, biological regeneration, and drip washing ZPBF. Until concentration of NH4+-N was more than 1.5mg/L of effluent standards, water in ZPBF-BAF was firstly emptied. The results show that NH4+-N average removal was 87% and TN average removal was 60% at the blast for 24h and 5d of continuous operation period.The results show that the effluent water could comply with the first grade B in "Discharge Standard of Water Pollutants for Bei Jing city".
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