【摘要】 采用上流式沸石曝气生物滤池(ZBAF)处理城市纳污河水,研究其挂膜启动过程,以及对有机物、NH3-N、SS的去除效果及影响因素。结果表明,在水温为11～24℃条件下,气水比对NH3-N的去除要比对COD和SS的去除影响大得多;当水力负荷为1.2m3/(m2.h),曝气量为3∶1时,对污染物的去除效果最佳;滤池填料高度对各种污染物的去除有较大影响,大部分有机物在进水端40cm厚的填料层内得到降解,而氨氮的硝化主要集中在上层填料层内。更多还原

【Abstract】 Upflow zeolite biological aerated filter (ZBAF) was utilized to treat contaminated river water.The starting of ZBAF and removal efficiencies of COD_ Cr , ammonia,SS and the affecting factors were investigated.The results showed that with water temperature about 11～24 ℃,gas-water ratio affected ammonia removal efficiency much more than that of COD_ Cr and SS; the system functioned well on conditions of hydraulic loading near 1.2 m2/(m3·h) and sufficient air supply.The heights of the filter had great effects on the removal of different pollutants.Most of organic substances were degraded in the lower 40 cm of media near inlet,while most of ammonia were nitrified in the upper media.更多还原