In addition to general domestic sewage, many sewage contains chemical substances, radioactive wastewater and pathogens. Therefore, it must be treated before it can be discharged. Hospitals without centralized sewage treatment equipment must be disinfected separately to make them harmless. Commonly used disinfectants are bleaching powder, liquid chlorine, sodium hypochlorite, and ozone. Wastewater containing radioactive isotopes shall be treated in accordance with the isotope treatment requirements. In the same sewage treatment process, the sedimented sludge contains a large number of bacteria, viruses and parasite eggs, which can be used as fertilizer after disinfection (usually slaked lime disinfection) or high temperature composting.

There are three categories of sewage treatment methods:

1. Biological treatment method: Use the adsorption and oxidation of microorganisms in water to decompose organic matter in sewage, including aerobic and anaerobic microbial treatment, generally with aerobic treatment.

2. Logistics chemical treatment: The combination of coagulation and sedimentation (air flotation) technology and activated carbon adsorption is the basic method. Compared with the traditional earphone treatment, the improvement is unknown, but the operating cost is higher.

3. Membrane treatment: Ultrafiltration (microfiltration) or reverse osmosis membrane treatment is used, which has the advantage of high SS removal rate, and the floor space is much reduced compared with the traditional secondary treatment. However, there is some controversy in the practical application of this industry at present.

Guangdong Youerli Environmental Protection Technology Co., Ltd. is a technology-based enterprise specializing in the research and development of water treatment technology. It undertakes various water purification projects and sewage treatment projects, and provides customers with engineering design, manufacturing, installation, commissioning, operation and other services. The company's service fields involve real estate, municipal administration, food and beverage, electronics, electric power, chemical industry, medicine, printing and dyeing, starch, beer, brewing, slaughtering and other industries.

Several methods of using the buried sewage treatment plant:

It can treat the comprehensive sewage of the living system and its similar organic sewage;

It adopts glass fiber reinforced plastic and stainless steel structure, which has excellent characteristics such as corrosion resistance and has a service life of more than 50 years;

The installation is simple in construction and easy to operate, all mechanical equipment is automatically controlled, and all installations can be set within the surface!