Under the mutual promotion of urbanization rate, industrial output rate, sewage quality and effectiveness regulations, and the sales market for water environment improvement, the indoor space of the sewage solution sales market will continue to expand. At present, the country vigorously promotes the environmental protection industry, and the development concept of "green mountains and clear waters are invaluable assets" is enough to demonstrate China's confidence in winning the long-term battle against environmental protection.

Sewage treatment can be divided into domestic sewage treatment and industrial sewage treatment. According to relevant laws and regulations on environmental protection in China, strict environmental standards must be implemented for domestic sewage and industrial sewage. If they are not up to standard, they cannot be discharged into society. At the same time, due to the substantial differences between domestic sewage and industrial sewage, industrial sewage cannot be immediately connected to domestic sewage treatment plants for sewage treatment work. The following content will provide a detailed explanation of the differences between domestic sewage treatment and industrial sewage treatment.

Basic Principles of Domestic Sewage Treatment

The specific goal of domestic sewage treatment is to remove COD organic compounds from the water. The key is to use microbial methods and the use of activated sludge method microbial strains for dissolution. It is currently a relatively economically developed and compatible sewage treatment process, mainly using water to distinguish the water body, water flow rate, and different natural environmental conditions of domestic sewage, and then selecting sewage treatment processes that pose long-term risks to project investment and operating costs.

Basic Principles of Industrial Wastewater Treatment

The key to industrial wastewater treatment is to carry out comprehensive filtration of discharged wastewater for compounds that seriously affect the natural environment. Except for fine sand and fly ash, microbial sludge is very important. Excessive sedimentation is not easy to solve, and the moisture content is extremely high. Most of it occupies the indoor space of sewage tanks. Therefore, priority should be given to solving this part of medical treatment. The organic compound composition in industrial sludge is too high, and it is prone to decay if placed for a slightly longer period of time. Failure to solve it in a timely manner can lead to secondary pollution, and the pungent odor it causes will continue to harm the surrounding environment. In addition, the floating of industrial sludge can disrupt the normal operation of sedimentation tanks, causing water bodies to deteriorate.

The difference between domestic sewage treatment plants and industrial sewage treatment plants

（1） Different functions

Domestic sewage treatment plants: The key role is to provide domestic sewage treatment services to the public. The construction and progress of domestic sewage treatment plants are the main guarantee for urbanization construction and the main support point for establishing a green ecological future development. In town.

Industrial sewage treatment plants: provide sewage treatment service projects for government agencies, institutions and other business operators. The construction and progress of industrial sewage treatment plants are the main guarantee for the development trend of industrial parks and industrial clusters, and are the main support point for completing industrial sewage treatment plants. The trend of green ecological development in industrial parks.

（2） Different processing techniques

Domestic sewage treatment plant: Domestic sewage treatment is mainly a part of biochemistry, which includes basic activated sludge treatment process, anaerobic fermentation oxygen deficiency aerobic method (A2O), anaerobic fermentation oxygen deficiency (A/O), and sequencing batch activated sludge (SBR).

Industrial wastewater treatment plant: The key to industrial wastewater treatment is to carry out comprehensive filtration for compounds that seriously affect the natural environment and their discharged wastewater. Compared with domestic sewage, industrial sewage has a more complex composition, more severe environmental pollution, and a higher degree of difficulty in solving it.

Industrial wastewater treatment is matched with different industrial categories and industry classifications. The pollutants contained in industrial wastewater throughout the entire process vary greatly in different fields, and the cleaning solutions are also different. Compared to domestic sewage treatment plants, industrial sewage treatment plants have their own characteristics and it is unlikely to rely solely on one process to solve all industrial wastewater. This is also the most essential difference between green plants and domestic sewage treatment.

（3） Different regulations on environmental tax payment

Domestic sewage treatment plant: According to Article 12 of the Environmental Protection Tax Law, if the taxable pollutants discharged by the domestic sewage treatment plant do not exceed the relevant national and regional standards, environmental protection tax shall not be levied. Those who exceed national and regional environmental protection standards and do not meet the tax-free environmental protection tax standards should apply for and pay environmental protection tax in accordance with regulations.

Industrial wastewater treatment plants: There is no requirement for exemption from environmental taxes. However, according to Article 4 of the Environmental Protection Tax Law, companies, government agencies, public institutions, and other business operators who discharge taxable pollutants from industrial wastewater treatment plants are not allowed to directly discharge pollutants into the natural environment and do not pay the corresponding environmental protection tax for the pollutants.

With the strengthening of the transformation in the environmental protection industry, the pollution substances of construction project enterprises need to achieve higher quality and meet environmental protection standards. This requires construction project enterprises to raise environmental protection awareness, strengthen communication and exchange with the environmental protection bureau, make project construction meet national and regional environmental protection levels and regulations, apply sewage treatment equipment that meets standards, ensure that the pollution level reaches environmental protection standards, and properly prepare for the company to treat sewage. The pipelines that comply with regulations entering the sewage treatment plant are maintained.

In summary, whether it is domestic wastewater treatment or industrial wastewater treatment, both have their own unique aspects and cannot be confused. Ultimately, industrial wastewater has complex chemical components, high environmental pollution levels, and a high degree of difficulty in solving them. However, this does not mean that domestic sewage is very easy to solve. In China, there are also many areas where the sewage treatment capacity is not sound, and there is also a higher need to improve indoor space. When applying different methods and processing techniques, it is crucial to integrate construction site standards, basic construction costs, and other fields for comprehensive analysis in order to find more effective ways and achieve the desired practical results.

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