Unfortunately, the sewerage was not the only issue.

不幸的是, 污水并不是唯一的问题.

These days excrement is disposed of by proper sewerage;

现在的粪便靠下水道处理；

Sewerage could be used to confect and dilute polymer in order to reduce sewerage discharge, therefore, it must be treated with aeration.

为了减少油田污水外排，应用油田采出的污水配制和稀释聚合物溶液，需要对污水进行曝气处理。

Then he went to where the sewerage began and sawed an opening.

接着他来到排水系统开始的地方，锯开了一个口子。

The earthquake damage to water supply and sewerage pipelines is studied.

对地下结构的主要形式之一城市给排水管道的震害进行了研究。

Ash and elm trees lined the streets , all of which had a sewerage system.

道路两旁种有青槐和榆树, 并有相当完整的排水系统.

Some cities in the world still do not have proper industrial sewerage .

世界上有些城市仍然没有适当的工业污水工程。

It was very basic with no sewerage system and the effluent was collected daily.

这是非常基本的生活，没有污水收集系统和每日会收集污水。

A type decalcifying agent had negative effects on treating oily sewerage thus increasing the treatment cost while FT-2 type had less effects on treatment of oily sewerage.

型脱钙剂对含油污水处理有明显不利影响，增加环保成本，而FT-2型脱钙剂对含油污水处理影响不大。

Sewerage reuse in cities is the most effective solution of the shortage of water.

城市污水回用是解决水资源短缺的有效途径。