1. Capable of completely treating comprehensive wastewater from the living system and a series of similar organic wastewater.

2. The complete set of buried domestic sewage treatment equipment is easy to construct and operate, and all mechanical devices are automatically controlled. All devices can be set below the surface.

3. The sewage treatment equipment company provides extremely convenient equipment maintenance, with a service life of over 30 years.

The underground integrated sewage treatment process adopts internationally advanced biological sewage treatment technology, which integrates the removal of BOD5, COD, and NH3-N. It has the advantages of stable and reliable technical performance, good treatment effect, low investment, small land occupation, and convenient maintenance. The equipment is buried below the ground surface, and the surface above the equipment can be used for greening or other purposes without the need for building houses, heating, and insulation. The secondary biological contact oxidation treatment processes all adopt push flow biological contact oxidation, which has better treatment effects than fully mixed or two-stage series fully mixed biological contact oxidation tanks.

Moreover, the activated sludge tank has a small volume, strong adaptability to water quality, good resistance to impact loads, stable effluent quality, and no sludge bulking. The sewage treatment process in the pool adopts a new type of elastic three-dimensional reverse osmosis sewage treatment equipment with a large surface area and easy biofilm formation and detachment by microorganisms. Under the same organic load conditions, it has a high removal rate of organic matter and can improve the solubility of oxygen in the air in water.

The biochemical tank adopts the biological contact oxidation method, and the volume load of the filler is relatively low. The microorganisms are in the stage of self oxidation, and the mud production is low. It only needs to be discharged once every three months (90 days) or more (pumped or dehydrated into mud cakes by a manure truck for transportation). The deodorization method of the buried domestic sewage treatment equipment not only uses conventional high-altitude exhaust, but also comes with soil deodorization measures. The entire advanced sewage treatment technology system is equipped with a fully automatic electrical control system and equipment fault alarm system, which operates safely and reliably. Generally, there is no need for dedicated personnel to manage it, only timely maintenance and upkeep of the equipment.

Only by fully utilizing resources can resources be maximized. Therefore, the underground sewage treatment plants currently under construction in China break through the traditional concept of land use for sewage treatment plants, scientifically and reasonably utilize underground space, and save land resources. In the construction of conventional above ground sewage treatment plants, it is necessary to consider the greening rate index and health protection distance of the plant area, so as to occupy more land for the above ground sewage treatment plants. The biggest feature of this type of sewage treatment plant is that it operates underground, ensuring maximum utilization of the surface. At the same time, there are no hygiene protection requirements, and it will not use too much surface land resources, fully saving urban space.

China has selected multiple experimental pilot sites and tested the treated wastewater. The experiments have shown that the wastewater treated by the sewage treatment system can fully meet the standards. Therefore, it can be proven that buried sewage treatment equipment can fully save resources, improve land use efficiency, and reduce the impact on the environment.

Briefly describe the technical application of buried sewage treatment equipment:

(1) The first step is to slope the foundation pit according to the size of the buried sewage treatment equipment model. The slope size should be based on the soil condition and the thickness of the covering soil above the top of the product, with a slope angle of 30 ° -50 °.

(2) The second excavation depth and the elevation of the inlet and outlet connected to the sewage pipeline should reserve a 200mm sand laying size at the bottom of the trench when calculating the elevation; The excavated soil pile is placed 5 meters away from the surrounding area of the trench to prevent collapse caused by soil lateral pressure. In addition, a working site is reserved for the lifting of domestic sewage treatment equipment.

(3) When encountering groundwater, the third buried domestic sewage treatment equipment should first discharge the groundwater, carry out foundation treatment according to the dimensions and requirements in the schematic diagram, compact the base layer, and then lay sand. Lay 200mm sand and level it, without any sharp corners, stones or other debris inside the sand.

(4) When there is no groundwater in the fourth buried domestic sewage treatment equipment, the river water treatment will compact and sand the foundation, and the foundation treatment will be carried out according to the quartz sand filter and requirements in the schematic diagram.

(5) The fifth buried domestic sewage treatment equipment can be used in areas where the water content of the shallow sand filter underground is relatively high. Elevated precipitation excavation or open precipitation excavation can be used. When using open water drainage for trench excavation, preparations must be made before construction.

The specific method is as follows:

After the excavation of the pit, if there is mud in the buried domestic sewage treatment equipment during treatment, it should be excavated to a depth of 20-30cm. The steel gravity valve free filter should be used to drain the water in the deep pit and lay dry concrete to level it, ensuring consistent settlement after installation of the buried domestic sewage treatment equipment.

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