进行了初步研究，以调查回收废过滤器的效果 反冲洗水（SFBW）对隐孢子虫的影响及常规培养过程中的颗粒去除 沉淀和双介质过滤。当SFBW回收配置 使用（3000-19000个卵囊/100 L），隐孢子虫浓度在 与不使用回收时（6000-22000）的水一样低或更低 卵囊/100升）。过滤水的卵囊浓度通常低于 检测限为1卵囊/120加仑（~0.25/100升）。整个过程的移除是 大约5个日志（不含回收），每个回收场景大约5.7个日志（基于 使用原始隐孢子虫浓度和过滤水进行计算 检测水平。与去除隐孢子虫一样，去除浊度和 整个过程（沉淀+过滤）中大于2μm的颗粒相似 用于有回收和无回收的操作。典型过滤水中值 对于所有循环，大于2μm的颗粒浓度均小于0.5个颗粒/mL 场景，包括不回收。同样，沉淀水和过滤水的浊度 所有研究的水平通常为< 2和< 0。 03台大。包括2个参考文献、表格和图表。

Pilot studies were conducted to investigate the effect of recycling spent filter backwash water (SFBW) on Cryptosporidium and particle removal during conventional sedimentation and dual-media filtration. When SFBW recycle configurations (3,000-19,000 oocysts/100 L) were used, Cryptosporidium concentrations in settled water were as low as or lower than when no recycle was used (6,000-22,000 oocysts/100 L). Filtered water oocyst concentrations were typically below the detection limit of 1 oocyst/120 gal (~0.25/100 L). Overall process removal was about 5 log without recycle and about 5.7 log for each recycle scenario based on calculations using raw Cryptosporidium concentrations and filtered water detection levels. As with Cryptosporidium removal, removal of turbidity and particles > 2 um for the entire process (sedimentation + filtration) was similar for operations with and without recycle. Typical median filtered water concentrations for particles > 2 um were < 0.5 particles/mL for all recycle scenarios, including no recycle. Similarly, settled and filtered water turbidity levels for all studies were typically < 2 and < 0.03 ntu, respectively. Includes 2 references, tables, figures.