The equipment of buried domestic sewage treatment equipment consists of seven parts: 1. Primary sedimentation tank 2, contact oxidation tank 3, secondary sedimentation tank 4, disinfection tank 5, sludge tank 6, fan room 7, fan and pump distribution device.

Primary settling tank: the primary settling tank is a vertical flow settling tank. The rising velocity of the sewage in the sedimentation tank is 0.6-0.8 mm / sec, and the sludge precipitated is magnetically sucked out.

Contact oxidation tank: after initial sedimentation, the water flows to the contact tank for biochemical treatment. Contact pool is divided into 2-3 stages, total retention time is 3-5.5 hours, filler is honeycomb, semi-soft combination of filler, easy to conjugate, not plugging the ball. The gas / water ratio of contact pool is about 12:1.

Secondary sedimentation tank: After biochemical sewage flow to the secondary sedimentation tank, the secondary sedimentation tank is also vertical flow sedimentation tank, the upflow rate is 0.3-0.4 mm/sec, sludge pumping out.

Disinfection Pool and Disinfection Device: The disinfection pool of this device is 30 minutes according to the standard "GBJ48-83". If hospital sewage is used, the residence time of the disinfection pool can be increased by 1-1.5 hours.

The disinfection device is reformed with reference to foreign materials. It can continuously change the dosage according to the amount of effluent. It can add more drugs to more effluent, less water and less medicine. The dosage is chlorine cake. If the user needs other disinfection devices, the factory can be responsible for the purchase and installation.

Sludge tank: All the sludge from the primary and secondary sedimentation tanks are automatically discharged into the sludge tank for aerobic digestion. After digestion, there is little excess sludge. Generally, only one or two times a year can be transported by dung truck.

Fan room: The fan room is set under the disinfection pool. The entrance of the machine room adopts double-deck compartment door, and the air inlet has muffler, so there is no noise during operation.

Two pumps are used, one of which is reserved, and two fans are selected. In order to prolong the service life, alternate use is adopted.

The equipment can be either buried or ground type, depending on the user's land occupation and environmental conditions, the entire equipment foundation or pit can be made according to the user's requirements, can be directly excavated and leveled, installed into the equipment and then covered with soil, can also be made into a brick wall structure into a concrete structure of the whole pond foundation, the equipment in place before covering the flat plate, and equipment at the same time. There is a suitable gap between the two sides.

First, the advantages of geographical sewage treatment equipment are:

1. Buried below the surface, the surface above the equipment can be used as green or other land, without building and heating, insulation.

2. The two-stage biological contact oxidation process adopts push-flow biological contact oxidation, and its treatment effect is better than that of completely mixed or two-stage series biological contact oxidation tank. Compared with activated sludge tank, it has smaller volume, stronger adaptability to water quality, better impact load resistance, stable effluent quality and no sludge bulking. A new type of elastic three-dimensional filler is used in the tank, which has large specific surface area, and the microorganism is easy to hang up the film and take off the film. Under the same organic loading condition, the removal rate of organic matter is improved, and the solubility of oxygen in the air in water can be improved.

3. Biological contact oxidation method is adopted in the biochemical tank. The volume load of the filler is relatively low, the microorganism is in the self-oxidation stage, and the sludge yield is small. It only needs three months (90 days) or more to discharge the sludge (suction or dehydration of the dung truck into the sludge cake for transportation).

4. The deodorization method of the buried domestic sewage treatment equipment is equipped with soil deodorization measures besides conventional high-altitude exhaust.

5. The whole equipment processing system is equipped with automatic electrical control system and equipment fault alarm system. It runs safely and reliably. Normally, it does not need special management, but only needs timely maintenance and maintenance of the equipment.

Two. Several ways of using buried domestic sewage treatment equipment:

1. It can deal with the comprehensive wastewater from the living system and its similar organic sewage.

2. Adopting FRP and stainless steel structure, it has excellent properties of corrosion resistance and aging resistance, and its service life is over 50 years.

3. The whole set of equipment is simple in construction and easy to operate. All the mechanical equipment is automatic control. All the equipment can be set on the ground.

Three. The scope of application of buried domestic sewage treatment equipment:

1, hotels, restaurants, sanatorium, hospitals;

2, residential areas, villages, towns;

3, stations, airports, port terminals, ships;

4, factories, mines, troops, tourist spots, scenic spots;

5. All kinds of industrial organic wastewater similar to domestic sewage.