Stackable Underground Septic Tank Prefabricated Sewage Treatment Tank for Outdoor Anaerobic Wastewater Purification

Stackable Underground Mini Septic Tank — a prefabricated sewage treatment system engineered for reliable, environmentally friendly three-stage purification.

Three-stage purification treatment delivers more environmentally friendly performance, reflecting high-quality fine craftsmanship throughout. Manufactured from new PE raw material, the tank offers a long service life with no leakage, no odor, and no pollution. It is maintenance-free and ensures dependable anaerobic manure function through excellent sealing properties.

Looking for a plastic septic tank? Vantra offers a wide range of septic tanks with capacities from 0.8 m³ to 2.5 m³. Vantra septic tanks are made of high-quality HDPE (High Density Polyethylene), LDPE, or FRP (fiber-reinforced plastic), assuring you of a durable and solid tank.

The plastic septic tank is made of engineering polypropylene plastic and polymer composite material, manufactured by screw extrusion and one-time injection molding. It is resistant to corrosion and aging, with high strength, good sealing, and resistance to breakage. Its attractive appearance and quick installation save labor and time, making it an ideal solution for rural toilet renovation and sanitary toilet construction — a direct substitute for traditional septic tanks.

• Durable construction with simple, fast, and convenient installation.
• Convenient storage and transportation.
• Good permeability with a small footprint.
• High compressive strength and long service life.

The basic principle of the septic tank is to remove and kill parasite eggs and bacteria by utilizing the precipitation caused by the specific gravity of parasite eggs being greater than that of the fecal and urine mixture, combined with the principles of closed fecal anaerobic fermentation, liquefaction, ammoniation, and biological antagonism. This prevents mosquitoes and flies from breeding, achieving the purpose of harmless feces treatment.

The system handles community sewage and pollutants, killing mosquito eggs in the anaerobic and decay working environment of the septic tank. It provides temporary storage of sludge and organic sludge for anaerobic decay, and mature organic sludge can be used as agricultural fertilizer.

Three-chamber septic tanks are widely used for domestic sewage treatment projects, residential communities, office buildings, hotels, schools, hospitals, barracks, public toilets, drainage treatment at food processing enterprises, residential buildings, and other domestic sewage treatment applications.

Food-grade raw materials are integrally formed by rotational molding — non-toxic, environmentally friendly, and not easy to break. The reinforcing rib design of the barrel body improves impact resistance and resists deformation. The separator offers good compression resistance, strong bearing capacity, acid and alkali resistance, anti-corrosion performance, and a long service life.

The separator delivers excellent compressive performance, large bearing capacity, impact resistance, acid and alkali resistance, and corrosion resistance. It is produced in an integral shape with good sealing performance, no leakage, a neat interface, and convenient connection. The sturdy tube body ensures a long service life.

Impact resistance, good sealing performance, and no leakage. The corrugated design provides better compression resistance: the plastic septic tank uses a circumferential dense corrugation method for compression and impact resistance. Because the tank is integrally formed, there is no gap, effectively avoiding the infiltration phenomenon of traditional septic tanks and protecting the surrounding soil and groundwater.

Septic tanks treat feces by filtering and settling them. Solidified material decomposes at the bottom of the pool, while the upper hydrated objects enter the pipe and flow away. This prevents pipe blockage and gives solidified objects (feces and other garbage) sufficient time to hydrolyze. A septic tank is a small processing structure that separates and settles domestic sewage and performs anaerobic digestion of sludge.

The basic principle of molded septic tanks is to remove and kill parasite eggs and pathogens using precipitation — since parasite eggs have a greater specific gravity than the mixture of feces and urine — combined with closed anaerobic fermentation, liquefaction, ammoniation, and biological antagonism. This controls the breeding of mosquitoes and flies, achieving harmless excrement treatment. The three-cell septic tank consists of three connected pools linked by fecal tubes. Anaerobic fermentation takes place, and the middle layer of feces and parasite eggs, being heavier than the general mixture, settles readily. After more than 30 days of fermentation and decomposition, the middle manure fluid flows sequentially from the first pool to the third, precipitating or killing parasite eggs and pathogens in the feces.

Our plastic septic tank consists of three pools connected in the middle by soil pipe, operating primarily through anaerobic fermentation.

The company specializes in the design of various injection molding products and mold production. We undertake processing of a wide range of injection molding products, with a weight range of 0.5 kg to 70 kg, supported by a complete range of large and small injection molding machines. Current production includes septic tanks, small purification tanks, rainwater modules, and more.

Our core business is to provide customers with a full range of comprehensive environmental governance services — R&D, design, manufacturing, installation, commissioning, and operation — and to tailor solutions for each customer, completely solving environmental problems such as landfill leachate treatment. With the enterprise spirit of "focus, professionalism, intention, and innovation," Vantra has built a brand of environmental protection precision equipment, rooted in the national industry and serving China's environmental protection sector.