ith the rapid development of human society today, environmental protection has become a major global issue, among which the protection and rational utilization of water resources is the most important. Water is the source of life, and with the acceleration of industrialization and urbanization, the discharge of sewage is increasing day by day, which has caused serious pollution and destruction to the environment. Therefore, it is particularly important to explore effective sewage treatment technologies and methods under the guidance of environmental protection concept.

First, the importance of sewage treatment

1. Protect human health: Untreated or incompletely treated sewage may contain a large number of pathogenic microorganisms and other harmful substances, which will seriously threaten people's drinking water safety after being directly discharged into natural water bodies.

2. Maintain ecological balance: industrial wastewater and agricultural drainage discharged into surface water sources such as rivers and lakes without proper treatment will change its original ecosystem structure, leading to water quality deterioration and even extinction.

3. Realize recycling of resources: Through scientific and reasonable sewage treatment process, some renewable resources such as fertilizer and energy can be recovered, reducing resource waste.

Second, the main path of sewage treatment from the perspective of environmental protection

1. Source control: strengthen pollution source management and reduce pollutant production from the production process; Promote cleaner production processes and technological upgrading to achieve the goal of energy conservation and emission reduction.

2. Combination of centralized collection and decentralized treatment: for urban domestic sewage, a perfect pipe network system should be established for centralized collection, and the technical means with high efficiency and low energy consumption should be adopted for preliminary purification before being discharged or used for non-drinking water purposes such as landscape irrigation; For rural areas, we can adopt the way of on-site treatment of family-style miniaturized facilities according to the actual situation.

3. Application of multi-stage treatment process: A complete multi-stage treatment system is formed by combining physical method (sedimentation), chemical method (coagulation and disinfection) and biological method (activated sludge method and MBR membrane separation technology) to ensure that the effluent quality meets the requirements of relevant national standards.

4. Strengthen the construction of supervision mechanism: establish and improve the system of laws and regulations, strengthen law enforcement and severely punish illegal sewage discharge; At the same time, strengthen the monitoring and evaluation of the operation status of sewage treatment facilities, and find and solve problems in time.

　　In a word, while pursuing economic growth, we must pay attention to the protection of ecological environment. Only in this way can we leave a better earth home for future generations. In this process, innovation and improvement of sewage treatment technology and mode undoubtedly play a vital role.