The LRVs required to decrease HE concentrations in raw sewage to an acceptable level to manage the risk to human and livestock health were determined. An LRV of 3.0 was required to meet the HBT of 1 μDALY pppy in SE Australia where human helminth infections are not endemic. In comparison, a similar exposure volume and LRV in endemic regions would result in a HBT of 100 μDALY pppy.The risks posed by cattle- and pig-related helminths were also managed acceptably with the treatment of sewage providing an LRV of 3.0.New design equations were derived to determine LRVs based on hydraulic residence times (HRTs) in an activated sludge plant (ASP) and lagoons. The new equation for lagoons indicated that an LRV of 3.0 could be achieved with a HRT of 18 days or less.

中文翻译：

---

从污水中回收水的蠕虫对数减少值，以保护人类和种群健康

确定了将原污水中的HE浓度降低到可接受水平以管理对人类和牲畜健康的风险所需的LRV。在澳大利亚蠕虫感染并非地方性流行的澳大利亚东南部，需要LRV为3.0才能达到1μDALYpppy的HBT。相比之下，在地方性地区类似的暴露量和LRV将导致HBT为100μDALYpppy。牛和猪相关蠕虫的风险也得到了可接受的管理，污水处理的LRV为3.0。根据活性污泥厂（ASP）和泻湖中的水力停留时间（HRT），得出方程式来确定LRV。新的泻湖方程式表明，HRT为18天或更短时，LRV可以达到3.0。