隐孢子虫卵囊和聚苯乙烯微球的去除在滤池成熟期、滤池成熟后以及中试规模常规滤池和生物滤池24小时滤池运行结束时进行评估。本研究的主要目的包括确定高浓度卵囊是否在成熟期或连续播种的滤器运行结束时通过滤器。之前的研究没有发现成熟过程中去除率显著降低，但这些研究都没有在之前的过滤器运行过程中播种卵囊（使卵囊出现在反洗残余物中，反洗残余物构成初始过滤器成熟浊度峰值的重要部分）。 在反洗残余物的影响下，在废水中发现的卵囊和微球的浓度不高于成熟期后通过过滤器的水中的卵囊和微球浓度的5倍，具体取决于过滤器类型。在本研究中，常规过滤器和生物过滤器显示出相似的卵囊和微球去除率（分别约为1.5和2.0 Log），但生物过滤器显示出含有反洗残留物的废水样本中存在的卵囊和微球浓度略低。在本研究中，微球和卵囊的去除通常遵循相同的趋势，但在本研究中遇到的条件下，微球的去除比卵囊的去除更大。 包括14个参考文献、表格和图表。

Cryptosporidium oocyst and polystyrene microsphere removals were evaluated during the filter ripening period, immediately following filter ripening, and at the end of a 24-hour filter run of pilot scale conventional and biological filters. The main objectives of this study included determining whether or not a high concentration of oocysts pass through the filter during the ripening period or at the end of a continuously seeded filter run. Previous studies have not revealed significantly poorer removals during ripening, but none of those studies seeded oocysts throughout the preceding filter run (allowing oocysts to be present in the backwash remnants which compose a significant portion of the initial filter ripening turbidity spike). The concentration of oocysts and microspheres found in the effluent under the influence of backwash remnants ranged from no higher to 5-times higher than those in water passing through the filter after the ripening period depending on filter type. Conventional and biological filters showed similar oocyst and microsphere removals (roughly 1.5 and 2.0 Log, respectively) during this study, but the biological filters exhibited marginally lower concentrations of oocysts and microspheres present in the effluent samples containing backwash remnants. Microspheres and oocyst removals generally followed the same trends during this study, but there was a tendency for greater removal of the microspheres than oocysts under the conditions encountered in this study. Includes 14 references, tables, figures.