With the acceleration of society and urbanization and the expansion of industrial production, the problem of water pollution has become increasingly serious, which has become one of the important factors restricting economic and social development. Facing this challenge, establishing a scientific and reasonable sewage treatment system is not only the need to protect the environment and ensure people's healthy life, but also the key measure to realize the harmonious coexistence of economy and nature. This paper will discuss how the sewage treatment framework can form an effective environmental protection pattern and promote the realization of sustainable development goals.

First, the importance of sewage treatment

Water is the source of life, which is very important for human survival and development. However, the direct discharge of untreated or improperly treated domestic sewage and industrial wastewater into the environment will not only pollute the water source, affect the water quality safety, but also destroy the balance of the ecosystem and threaten biodiversity. Therefore, it is of great significance to purify sewage and reduce pollutant discharge by effective means for improving the quality of ecological environment.

Second, build a multi-level sewage treatment system

1. Source reduction: encourage enterprises and individuals to take water-saving measures to reduce sewage from the source; At the same time, we will strengthen supervision over highly polluting industries and promote technological transformation of cleaner production.

2. Combination of centralized collection and decentralized treatment: large sewage treatment plants can be built in big cities for centralized treatment; For remote areas, we should consider using miniaturized and modular decentralized processing facilities to meet the needs of different regional conditions.

3. Resource recycling: By recycling useful substances such as organic matter and heavy metals in sewage, it can not only reduce environmental pollution, but also create economic benefits.

4. Ecological restoration project: Ecological restoration combined with wetland park, artificial lake pond and other projects not only beautifies the urban landscape, but also enhances the self-purification ability in the region.

Third, technological innovation promotes the development of the industry

With the progress of science and technology, more and more new materials and technologies have been applied to the field of sewage treatment, such as membrane separation technology, advanced oxidation method and other high-efficiency and low-energy-consumption technical solutions have emerged. These innovations greatly improve the efficiency of sewage treatment, reduce the operating cost, and provide strong support for building a more perfect and efficient sewage treatment system.

IV. Policy Guidance and Public Participation

The government should introduce relevant policies and regulations, clarify sewage treatment standards and technical requirements, and increase penalties for illegal sewage discharge; At the same time, strengthen publicity and education, raise the awareness of the whole society on the importance of water resources protection, and stimulate citizens to actively participate in water conservation and environmental protection activities.

In a word, it is a long-term and arduous task to build a scientific, reasonable and efficient sewage treatment structure, which requires the joint efforts of the government, enterprises and all sectors of society to jointly create a good environmental protection atmosphere, work together to promote the construction of ecological civilization and create a better future.