With the acceleration of society, industrialization and urbanization, the problem of water pollution has become increasingly serious, which has become one of the key factors restricting the sustainable development of economy and society. As an important means to solve water pollution, sewage treatment plays an irreplaceable role in protecting the environment and ensuring human health. Using environmental protection to treat sewage can not only effectively purify water quality, but also reduce the negative impact on natural ecosystem and realize resource recycling. The following are some sewage treatment methods based on environmental protection concept:

1. Biological treatment technology: Biological treatment is a process of decomposing organic matter in water by using the life activities of microorganisms, including activated sludge method and biofilm method. These methods have the advantages of low cost, simple operation and high removal efficiency. The treatment effect can be further improved by reasonably designing the reactor structure and optimizing the operation conditions.

2. Wetland system: Artificial construction or restoration of natural wetlands for sewage treatment is a technology that simulates the self-purification ability of nature. It uses the absorption and filtration of plant roots and the degradation function of microbial community in soil to effectively remove pollutants in sewage. In addition, this method also has the functions of beautifying the landscape and providing habitat.

3. Advanced oxidation process (AOPs): For refractory organic matter and trace pollutants, advanced oxidation processes such as photocatalytic oxidation and ozone oxidation can be adopted. This method can produce strongly oxidizing free radicals, quickly destroy the molecular structure of harmful substances, and achieve the purpose of deep purification.

4. Reuse and zero discharge strategy: Through the comprehensive treatment of industrial wastewater in three stages: pretreatment, main treatment and post-treatment, combined with membrane separation, evaporation concentration and other technologies, the maximum recovery and reuse of water resources can be realized. At the same time, scientific and reasonable disposal methods are adopted for the parts that are difficult to treat to ensure that the whole process is close to zero emission.

5. Public participation and social responsibility: encourage all sectors of society to actively participate in sewage treatment, and the government should formulate relevant policies to guide and support enterprises to strengthen internal management and promote cleaner production; The media should increase publicity and enhance citizens' awareness of environmental protection; Schools should incorporate environmental protection education into the curriculum system to cultivate the sense of responsibility of the next generation.

In a word, it is a complex and long-term task to choose an appropriate environmental protection way for sewage treatment, which requires the joint efforts of the government, enterprises and individuals to constantly innovate and improve the existing technical system in order to leave a better living environment for future generations.