The strength of a country is inseparable from the development of the national economy, and the foundation of the national economy lies in the development of national industry. In industrial production, it is inevitable to produce a large amount of sewage and wastewater. If these industrial sewage and wastewater are not treated in time, it will have a serious impact on the living environment. Next, let's talk about the necessity of industrial wastewater treatment and the matters we need to pay attention to in the treatment process.

        First of all, with the continuous discharge of various industrial wastewater and domestic sewage, the water resources we can use will inevitably be polluted, resulting in less and less water available for our life, resulting in the shortage of water resources. If we do not change it, it will only further aggravate this vicious circle. Therefore, we should make rational use of this limited resource. But how to treat the discharged sewage and wastewater? We can use sewage treatment equipment to treat and reuse the purified sewage, which can also play a great role in protecting the environment. Because the sewage and wastewater discharged from some chemical plants contain corrosive substances, which will cause great pollution to the environment if they are discharged without treatment. Therefore, it is necessary to treat sewage before discharge. What principles should we follow in sewage treatment?

       In the process of industrial sewage treatment, we need to pay attention to many things. The Xiaobian summarizes the following points: first, in terms of production process, we give priority to non-toxic and environmental protection process, and try our best to eliminate or reduce the generation and discharge of toxic and harmful sewage and wastewater in the process of production; Second, if the production needs to use toxic raw materials or produce toxic substances in the production process, we need to adopt reasonable processes and equipment, operate carefully and strictly, monitor various indicators in real time, supervise each link, avoid dripping and reduce loss; Third, if the industrial wastewater contains highly toxic substances, such as some heavy metals, radioactive substances and high concentration phenols, it needs to be separated from other wastewater in order to treat and recycle other useful substances; Fourth, the wastewater with little pollution should not be directly discharged, especially into the sewer, otherwise it will increase the burden on the sewage treatment work. For the wastewater with light pollution and large flow, it can be recycled after appropriate treatment, which can also save the production cost; Fifth, wastewater from food processing plants, sugar making wastewater and papermaking wastewater belong to organic wastewater, which is similar to urban sewage and can be discharged into the urban sewage system for treatment; Sixth, some biodegradable toxic wastewater, such as phenol and cyanide wastewater, can be treated first and then discharged into urban sewers after reaching the discharge standard, and then further biochemical treatment; Seventh, toxic wastewater that is difficult to biodegrade cannot be discharged into sewers and should be treated separately. The most basic principle of all industrial sewage treatment is to recycle and reuse the sewage, wastewater and pollutants as much as possible or implement closed-circuit circulation.

       To sum up, it is not difficult for us to see that industrial sewage treatment is very important and must be treated scientifically, otherwise it will have a serious impact on the environment. Of course, the treatment should also be tailored according to the nature of sewage, so as to achieve the ideal effect of sewage treatment.