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 sustainable development. As an important part of environmental protection, the development and improvement of sewage treatment technology is not only related to the improvement of people's quality of life, but also the key to achieve the goal of ecological civilization construction and promote the harmonious coexistence of economic social and natural.

First, the importance of sewage treatment

1. Ensure public health and safety. Untreated or incompletely treated sewage often contains a lot of harmful substances, such as heavy metal ions, pathogenic microorganisms, etc. If it is directly discharged into nature, it will seriously threaten the living environment of human beings and other organisms.

2. Maintain ecological balance. Reasonable and effective sewage treatment measures can effectively reduce the impact of pollutants on surface water and groundwater, protect water resources from destruction and maintain ecosystem diversity.

3. Recycling of resources. Through advanced treatment technology, valuable resources (such as fertilizers such as nitrogen, phosphorus and potassium) can be recovered from wastewater, and at the same time, reclaimed water that meets the standards can be produced for agricultural irrigation or other non-drinking purposes, thus improving the utilization rate of water resources.

Second, the current challenges faced by sewage treatment

Although China has made remarkable achievements in the field of sewage treatment, there are still some problems to be solved urgently:

1. The technical level is uneven. Due to the limitation of economic conditions, some areas adopt backward traditional methods to deal with it, which is inefficient and difficult to meet the requirements of national standards.

2. Insufficient enforcement of laws and regulations. In order to save costs, some enterprises ignore the constraints of laws and regulations, and the phenomenon of exceeding the standard without authorization occurs from time to time.

3. Low public participation. The lack of sufficient publicity and guidance has led to a low level of cognition and support for sewage treatment work in all walks of life.

Iii. Suggestions on Promoting the Development of Sewage Treatment

1 increase investment in scientific research, encourage technological innovation, introduce foreign advanced experience and technological achievements, and continuously improve the overall level of domestic sewage treatment industry.

2. Improve the relevant laws and regulations, strengthen law enforcement supervision, and ensure that all enterprises and individuals strictly abide by the regulations and fulfill their social responsibilities.

3. Carry out various publicity and education activities, enhance the national awareness of water conservation, advocate a green and low-carbon lifestyle, and form a good atmosphere for the whole society to pay attention to and support sewage treatment.

In a word, sewage treatment is a long-term and arduous task, which requires the joint efforts of the government, enterprises and every citizen to advance this great cause related to the national economy and people's livelihood. Only when everyone realizes his role in protecting Mother Earth and takes practical actions can we truly realize the beautiful vision of harmonious coexistence between man and nature.