With the rapid development of society and economy and the acceleration of urbanization, the problem of water pollution is becoming more and more serious, which has brought unprecedented challenges to the ecological environment. Sewage not only contains a lot of pollutants such as organic matter and inorganic salts, but also may be mixed with harmful substances such as heavy metals and pathogenic microorganisms, which poses a threat to human health. In order to effectively solve this problem and promote the sustainable development of economy and society, countries have turned their attention to the field of environmental protection technology and devoted themselves to developing more efficient, low-cost and environmentally friendly sewage treatment methods.

I membrane bioreactor (MBR) technology

Membrane bioreactor (MBR) is a new type of wastewater treatment process that has emerged in recent years. It combines the advantages of traditional activated sludge process with modern microfiltration or ultrafiltration membrane separation technology. By installing a semi-permeable membrane module made of special materials in the aeration tank, the effective separation of solid and liquid phases can be realized, and suspended particles and dissolved pollutants can be removed at the same time. In addition, the system occupies a small area and is simple to operate and maintain, especially suitable for urban areas with limited space.

Second, advanced oxidation technology

For some insoluble organic compounds that are difficult to be degraded by conventional means, such as dye wastewater and pharmaceutical wastewater, advanced oxidation technology has shown strong advantages. This technology uses strong oxidants to generate free radicals, which destroy complex molecular structures in a very short time and transform them into harmless substances such as carbon dioxide and water. At present, the more mature applications include ozone oxidation, Fenton reagent oxidation and photocatalytic oxidation.

Third, the construction of ecological wetlands

Imitating the water circulation process in nature, people creatively put forward the idea of constructing constructed wetlands to purify polluted water sources. These wetlands are usually composed of layers of fillers with different particle sizes and planted with specific types of plants. When the water flows through, the microbial community in the soil will decompose most pollutants; Vegetation, on the other hand, can absorb some nutrients and salts and release oxygen, thus promoting the virtuous cycle of the whole ecosystem. Compared with the traditional chemical treatment method, this method has the advantages of low cost, simple operation, beautifying the environment and increasing biodiversity.

IV. Intelligent Monitoring and Management Platform

With the development of cutting-edge information technologies such as Internet of Things and big data analysis, intelligence has become one of the important directions for the transformation and upgrading of modern sewage treatment industry. By deploying various sensor devices to collect the change information of water quality parameters, and using the cloud computing platform for real-time monitoring and early warning, it is helpful to improve the efficiency of fault diagnosis, optimize the allocation of resources, and ensure the effluent quality to meet the discharge standards.

In short, in the face of severe water shortage and environmental pollution, we must constantly innovate and improve the sewage treatment technology system, actively promote the concept of energy conservation and emission reduction, and strive to build a clean and beautiful world.