In society, environmental problems are becoming more and more serious, and water pollution has become one of the major challenges facing human survival and development. As an important means to solve this problem, the research and application of sewage treatment technology is particularly important. This paper will discuss the key technologies in sewage treatment and their importance to environmental protection from several aspects.

A, physical processing method

Physical treatment is the first step in the process of sewage purification, which mainly removes large particles and suspended substances in sewage through facilities such as grids and sedimentation tanks. This step can effectively reduce the pressure in the subsequent chemical or biological treatment stage, and at the same time reduce the possibility of direct discharge of pollutants into natural waters, which is of great significance for protecting water sources.

Second, the chemical treatment method

Chemical treatment usually includes coagulation, redox reaction and other ways to degrade harmful substances. Among them, advanced oxidation process (AOPs) has attracted wide attention because of its high efficiency and strong adaptability. This method can quickly decompose refractory organic matter without secondary pollution, and it is one of the effective ways to realize the recycling of water resources.

Third, the biological treatment method

Biological treatment refers to the process of transforming and stabilizing organic pollutants in wastewater by using microbial metabolism. Activated sludge process and biofilm process are the two most common forms. These methods are not only low in cost, but also can effectively remove nutrients such as ammonia nitrogen and phosphorus, prevent eutrophication and maintain ecological balance.

Four, membrane separation technology

With the development of nano-materials science, membrane separation technology has become a new and efficient sewage treatment method. It can accurately control the molecular size, so as to selectively intercept specific types of pollutants. In addition, reverse osmosis technology can also recycle fresh water and improve resource utilization.

V. Intelligent management

Modern information technology, such as Internet of Things and big data analysis, has also been widely used in the field of sewage treatment, realizing remote monitoring, fault diagnosis and other functions. This is helpful to improve the operating efficiency of the system, reduce energy consumption and ensure that the effluent quality meets the standard.

Summary:

To sum up, adopting a comprehensive sewage treatment strategy, combined with a variety of advanced technologies and intelligent management systems, can not only effectively improve the water quality, but also alleviate the impact of global climate change to some extent. In the future, we should continue to increase investment in scientific research, explore more innovative solutions and jointly protect the beautiful home of Mother Earth.