给排水专业英语翻译

Following the washing process, water should be filtred go waste until the turbidity drops to an acceptable value. Filter-to-waste outlets should be through an air-gap-to-waste drain, which may require from 2 to 20 mimutes, depending on pretreatment and type of filter. This practice was discontinued for many years, but modern recording turbidimeters have shown that this operation is valuable in the production of a high-quality water. Operating the washed filter at a slow rate at the start of a filter run may accomplish the same purpose. A recording turbidimeter for continues monitoring of the effluent from each individual filter unit is of great value in controlling this operation at the start of a run, as well as in predicting or detecting filter breakthrough at the end of a run.

随着反冲洗得进行，冲洗水应当排入废水中，直到浊度下降到一个可接受的值为止。过滤器对废物网点应通过气隙至废物排放，这可能需要2到20 mimutes，取决于预处理和滤波器的类型。这种做法已经停产多年，但现代录音浊度仪已经表明，这种操作是有价值的生产高品质的水。操作清洗过滤器以缓慢的速度在过滤器运行开始可以达到相同的目的。一种记录浊度仪用于继续监视从每个过滤单元出水是很有价值的控制

此操作在运行开始时，以及在在运行结束预测或检测过滤器的突破。

The time from start to full backwash flow should be at least 30 seconds and perhaps longer, and should be restricted by devices biut into the plant. This is frequently done by means of an automatically regulated master wash valve, controlled hydraulically and designed so that it cannot open too fast. Alternatively,a speed controller could be installed on the operator of each washwater valve.

从开始时间到全反洗流量应该是至少30秒或更长，并且应该由内置于设备的植物受到限制。这是经常由一个自动调节主洗阀来完成的，液压控制和设计，以便它不能打开过快。或者，速度控制器可以安装在每个清洗水阀门的操作者。