In a recent contribution by Curry and colleagues, a field-derived assessment of a reportedly common pretreatment technique to reduce turbidities of biosand filter (BSF) feed water was reported. Their results demonstrated that despite alum pretreatment achieving lower settled turbidity values relative to control filters, such intervention led to significantly lower flow rates in the alum-dosed BSFs. However, their study stopped short of providing a more meaningful interpretation to what may initially seem like a counterintuitive finding, which is presented here.

中文翻译：

---

明矾预处理对生物砂滤池性能的影响：对Curry等的评论。（2020年）

在Curry及其同事的最新贡献中，据报道对降低生物砂滤池（BSF）进水浊度的一种常用预处理技术进行了现场评估。他们的结果表明，尽管明矾预处理相对于对照过滤器实现了更低的沉降浊度值，但这种干预导致明矾添加的BSF中的流速大大降低。但是，他们的研究并未对最初似乎是违反直觉的发现提供更有意义的解释。