1, buried below the surface of the ground, the surface above the equipment can be used as green or other land, without the need to build houses and heating, insulation.
2, the two biological contact oxidation treatment process are used to push the flow of biological contact oxidation, the treatment effect is better than completely mixed or two series completely mixed biological contact oxidation tank.
3, buried sewage treatment equipment in addition to the use of conventional odor in addition to high-altitude exhaust, with soil deodorization measures.
Disadvantages:
1. Not conducive to maintenance. Equipment failure, it is not convenient to overhaul and replacement.
2. Adaptability to the environment, winter anti-freezing, summer flood prevention. The north needs to be buried deeper and insulated.