Foreword:

The machining industry plays a fundamental role in the national industry, and it is also a pillar industry of a country, which can greatly affect the development of the national economy. In recent years, the global machining and manufacturing technology has developed rapidly, and the production efficiency and technical precision have been continuously improved. At this stage, the pollution of mechanical processing is also very serious. It is necessary to strengthen the supervision and management of the oily wastewater and other toxic and harmful wastewater treatment work by enterprises, and strictly prevent the excessive discharge of toxic and harmful wastewater in the production process, which endangers human health and pollutes the surrounding environment.
t present, the pollution of mechanical addition T is mainly caused by the pollution of various residual liquids in the dry manufacturing process. In the process of machinery manufacturing, the wastes generated by lubricating oil, cutting fluid, polyurethane, cleaning fluid, cooling fluid, etc. are not thoroughly treated, and are directly discharged to the ground, polluting the groundwater. In the mechanical processing industry, the more common wastewaters are: painting wastewater, dust removal wastewater, Fu, chemical liquid preparation wastewater, etc. The main methods of waste water generation are partial discharge of circulating water and all discharge and renewal of circulating water after long-term use. Wastewater pollutants are mainly divided into two categories: domestic sewage and production wastewater. Domestic waste water mainly includes waste water from Hetang Hall, accommodation waste water and domestic office waste water; production waste water in the machining industry mainly includes painting waste water, dust removal waste water, emulsion preparation waste water and so on. In order to save trouble, some factories directly discharge these waste water, and then seriously pollute the groundwater.