primary treatment of sewage

However, in current main biochemical sewage treatment technology, the aeration devices are the primary energy-consuming equipments, which system costs about 50-70% of the total power consumption.

但在当前主流的生化法处理工艺中，曝气设备是其中的主要耗能设备，曝气系统电耗约占处理厂全部电耗的50 - 70%。

Sewage sludge which mainly comes from the primary settling tank and discharge of surplus sludge is the deposit produced in each operating unit in municipal wastewater treatment plant.

城市污泥是城市污水处理厂经各级处理净化污水而产生的沉积物，主要来自初沉池和剩余污泥的排放。

Through primary treatment of acid wastewater, polymerizing iron sulphate of sewage cleaning anents is prepared.

对酸洗废液进行一次性处理，并制取污水处理剂聚合硫酸铁。