4. Conclusion
In general, the treatment of sewage requires scientific ideas and advanced equipment. Through the study of all the current wastewater and sewage treatment methods, it can be found that whether chemical treatment, physical treatment or biological treatment, it is an effective combination of scientific and technological means and practice. The ultimate goal is to ensure the safety and security of water resources. To ensure the stable development of human normal life and the healthy and sustainable development of society. According to the actual environment and needs, appropriate treatment methods should be reasonably selected to reduce the impact of sewage and wastewater on the ecological environment as much as possible.
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