With the growth of the economy and population, human attention to environmental pollution has been increasing. Based on summarizing the operation experience of domestic and international domestic sewage treatment devices, and combining our company’s independent scientific research achievements and engineering practices, we have designed a complete set of buried organic wastewater treatment equipment. This equipment adopts advanced processes and manufacturing technologies at home and abroad in the late 1990s, and is produced as the SPR series sewage treatment equipment with fiberglass-reinforced plastic (FRP) and stainless steel as the main raw materials. Its main purpose is to treat domestic sewage and similar industrial organic wastewater to meet the discharge standards required by users.

I. Overview

With the growth of the economy and population, human attention to environmental pollution has been increasing. Based on summarizing the operation experience of domestic and international domestic sewage treatment devices, and combining our company’s independent scientific research achievements and engineering practices, we have designed a complete set of buried organic wastewater treatment equipment. This equipment adopts advanced processes and manufacturing technologies at home and abroad in the late 1990s, and is produced as the SPR series sewage treatment equipment with fiberglass-reinforced plastic (FRP) and stainless steel as the main raw materials. Its main purpose is to treat domestic sewage and similar industrial organic wastewater to meet the discharge standards required by users.

This equipment is mainly used for domestic sewage treatment in residential communities (including villa communities), high-end hotels, hospitals, comprehensive office buildings and various public buildings. The effluent quality after treatment by this equipment meets national discharge standards. The entire set of equipment can be buried underground, so it is also called "buried domestic sewage treatment equipment".

Our company’s buried domestic sewage treatment equipment adopts an advanced biological treatment process, integrating the removal of BOD₅, COD and NH₃-N. It has the advantages of stable and reliable technical performance, good treatment effect, low investment, small floor area and convenient maintenance. Our company can also provide supporting reclaimed water reuse equipment according to customer requirements.

II. Product Features

1. Buried underground: The ground surface above the equipment can be used for greening or other purposes, eliminating the need for building construction, heating and thermal insulation.
2. Secondary biological contact oxidation process: The process adopts plug-flow biological contact oxidation, whose treatment effect is better than that of completely mixed biological contact oxidation tanks or two-stage series completely mixed biological contact oxidation tanks. Compared with activated sludge tanks, it has a smaller volume, stronger adaptability to water quality, better shock load resistance, stable effluent quality and no sludge bulking. The tank is equipped with new elastic three-dimensional fillers, which have a large specific surface area, enabling microorganisms to easily form and peel off biofilms. Under the same organic load, it has a high removal rate of organic matter and can improve the solubility of oxygen in the air in water.
3. Biological contact oxidation method for biochemical tanks: The volume load of the filler is relatively low, and microorganisms are in the self-oxidation stage, resulting in a small amount of sludge production. Sludge only needs to be discharged once every three months (90 days or more) (suction by a manure truck or dewatering into sludge cakes for transportation).
4. Deodorization method of the buried domestic sewage treatment equipment: In addition to the conventional high-altitude exhaust, it is also equipped with soil deodorization measures.
5. The entire equipment treatment system is equipped with a fully automatic electrical control system and an equipment failure alarm system, ensuring safe and reliable operation. Generally, no full-time personnel are required for daily management, and only timely maintenance and upkeep of the equipment are needed.
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III. Usage Method

• It can treat comprehensive wastewater from domestic systems and similar organic sewage.
• Made of fiberglass-reinforced plastic (FRP) and stainless steel, it has excellent properties such as corrosion resistance and aging resistance, with a service life of more than 50 years.
• The entire set of equipment features simple construction and easy operation. All mechanical equipment is automatically controlled, and the entire device can be installed underground.

IV. Application Scope

1. Hotels, restaurants, sanatoriums and hospitals;
2. Residential communities, villages and market towns;
3. Railway stations, airports, seaports, docks and ships;
4. Factories, mines, military units, tourist spots and scenic areas;
5. Various industrial organic wastewater similar to domestic sewage.