dross trap是什么意思

用法例句

With respect to the technical renovation of scum collection system of aerated grit chamber in Tuandao Wastewater Treatment Plant, a new method was developed for upgrading the removal efficiency of grease and scum without transforming the former structure and equipment.

　结合青岛市团岛污水处理厂曝气沉砂池浮渣收集系统的技术改造实践,介绍了一种在原有构筑物及设备基础上提高油脂浮渣去除率的方法。