The difference between domestic sewage and domestic wastewater, the difficulty of domestic sewage treatment

The difference between domestic sewage and domestic wastewater

The difference between domestic sewage and domestic wastewater is that domestic sewage pollution is relatively serious and the recycling cost is relatively high, mainly referring to the water discharged by toilets and toilets. Wastewater, on the other hand, is less polluting and easier to recycle. Mainly: laundry water, bath water, kitchen discharge water and so on.

In fact, in the design of building water supply and drainage pipelines, most of them are combined with waste water. For example, the toilet flushing water, bath water, and hand washing water are basically confluence and shared risers, and only when the water reuse system is set up, it needs to be distinguished.

Domestic wastewater refers to the washing water discharged in the daily life of residents. In fact, only a small part of the wastewater is treated, and most of it is discharged directly into rivers without treatment. It's worse in smaller cities. Stool is generally not directly discharged, but there are collection measures. The composition of pollutants in wastewater is extremely complex and diverse, and any treatment method is difficult to achieve the purpose of complete purification, and often several methods are used to compose a treatment system in order to meet the requirements of treatment. According to the different degree of treatment, the wastewater treatment system can be divided into primary treatment, secondary treatment and advanced treatment.

The difficulties of urban domestic sewage treatment

China's urban domestic sewage mainly comes from the household sewage of residents, compared with the industrial wastewater of those enterprises, the sewage made in life is lower than the sewage made by the factory. In urban family life, the composition and quality of sewage produced by different domestic water facilities are different. Therefore, at present, the main problems facing China's urban domestic sewage treatment are the following:

The pollution of municipal sewage is overloaded and difficult to assess: With the development of China's economy, people's living standards are gradually diversified, and people's demand for water in their lives is getting higher and higher, which results in the complexity of urban water pollution components. The pollution load and seasonal changes of urban water pollution are difficult to control, and are not transferred by people's will. It brings a lot of inconvenience to the choice and design of urban water pollution treatment scheme.

Urban domestic water pollution treatment is affected by social factors and natural factors: most of the water pollution treatment technologies in many cities are studied by experimental methods, but the actual operation process is greatly affected by the external environment. Not only that, in different regions, different levels of economic development and some man-made factors will also have a certain degree of impact on the treatment technology of urban domestic sewage, coupled with the constant change of the natural environment, urban sewage treatment is difficult to achieve the desired effect.

This article focuses on the difference between domestic sewage and domestic wastewater, as well as the treatment of urban domestic sewage, I believe that everyone has a clearer understanding of the concept of domestic sewage and domestic wastewater. In addition, we can see that there are some objective difficulties in the treatment of urban sewage treatment, so we should also pay attention to reducing the discharge of domestic sewage in our daily life.