# Research Status and Development Trend of Wastewater Treatment Technology and Its Low Carbonization
## 3 Low-Carbon Sewage Treatment Technology
### Growing Trend  
At present, the discharge standards of sewage treatment are very strict. All kinds of sewage treatment industries are following the discharge indicators, and vigorously developing and optimizing. At the same time, with the emergence of the development of carbon-neutral and low-carbon industry, the research on energy conservation and emission reduction has become an important task in industrial development. Therefore, although the sewage treatment industry is not a prominent carbon emission industry, its long-term water treatment projects and the accumulation of large amounts of high energy consumption will definitely contribute to carbon emissions [87]. Therefore, in the process of sewage treatment, it is very important to develop the low-carbon treatment technology of sewage through energy saving, consumption reduction and resource recovery as much as possible. However, at present, the new methods of low-carbon water treatment technology and related evaluation standards are still relatively lacking. When we are developing low-carbon water treatment technology, we also need to have an accounting of the carbon emissions in the whole treatment process, so as to promote the perfection of the certification and testing system for low-carbon sewage treatment technology. In addition, it would help us regulate put emissions requirements on CO\({}_{2}\) and other greenhouse gases from sewage treatment. According to the current situation, in the future we will need more advanced monitoring systems, and obtain the greenhouse gas pollutants produced in the process of sewage treatment to make the corresponding inventory descriptions, and develop a series of discharge standards. In terms of the carbon emission assessment of sewage treatment plants, more appropriate algorithms are also needed to establish a deep learning model, so as to better realize the accurate accounting of carbon emissions in the process of sewage treatment [88; 89; 90].  
According to the above research status of low-carbon sewage treatment technology, we can find that it is possible to realize low-carbon sewage treatment. According to the current situation of each existing sewage treatment plant, reasonable improvements should be made under the supervision and technical support of relevant departments. Relevant departments cannot be one-size-fits-all, requiring the unified transformation of each sewage treatment plant, but specific rectifications must be carried out. The proposed resource recycling carbon conversion and reuse is the basic guarantee for the current low-carbon sustainable development. The concept of sustainable development can and must be realized under any conditions, which is the general trend of development. As for the implementation of low-carbon and carbon sequestration comprehensive treatment, optimization of operation parameters and process improvement, it is necessary for each sewage and water treatment plant to carry out the implementation according to its own regional water quality and plant conditions. Proper equipment upgrading and process optimization are beneficial, but it is also necessary to be guided by facts.