The outstanding advantages of buried sewage treatment equipment include:

1. Strong ability to withstand impact loads. The average residence time of contact oxidation method is more than 6 hours;

2. It has the ability to remove nitrogen and phosphorus, and can achieve the ability to treat industrial wastewater, domestic sewage, and urban sewage by adjusting the structure of the equipment;

3. The fillers in the contact oxidation tank are mostly composite soft fillers, which are lightweight, high-strength, physically and chemically stable, have a large specific surface area, strong biofilm adhesion ability, and high contact efficiency between sewage and biofilm;

4. An aerator is used in the contact oxidation tank for air blowing aeration, causing the fiber bundles to continuously float and aerate evenly, resulting in mature microbial growth and possessing the characteristics of activated sludge process;

5. Stable effluent quality, low sludge production and easy treatment;

6. Submersible pumps can be installed in equipment to reduce project investment;

7. The equipment can be installed on the ground or buried underground. When buried underground, the upper cover can be used for greening, resulting in a smaller factory area and fewer ground structures;

8. Easy to achieve automatic control, simple management and operation