FRP septic tanks are a kind of FRP storage tanks specially designed for domestic sewage treatment. Manufactured by filament winding process with fiberglass as reinforcing agents and resin as binder, FRP septic tanks are a kind of composite products that have been actively promoted worldwide.
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Featured by lightweight, high strength, corrosion resistance and mirror-like finish, all these benefits make its performance far beyond that of similar products made of ceramic, hard plastic, steel, etc.
Compared with traditional septic tanks, FRP septic tanks are durable and not easy to leak. For more information, please refer to FRP Septic Tanks VS Traditional Septic Tanks.
FRP septic tank working principle
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The work flow of FRP septic tank is generally divided into 4 stages: filtration and sedimentation, anaerobic fermentation, solids decomposition and manure discharge.
The sewage is firstly discharged from the water inlet to the one-stage anaerobic chamber, where the solids and insect eggs with higher specific gravity are deposited and the preliminary fermentation and decomposition begins. The sewage after the first chamber treatment is divided into 3 layers: the paste manure cover, clarified manure fluid and solid manure slag. The manure liquid after the preliminary decomposition flows into the two-stage anaerobic chamber, while the manure cover floating above the manure fluid and the manure slag deposited are retained in the first chamber for further fermentation. In the second chamber, the manure continues to ferment and decompose, and inset eggs continue to sink, and pathogens gradually die. As a result, the manure goes through further harmless treatment, and the thickness of manure covers and slags produced is significantly reduced compared with the first chamber. The manure flowing into the third chamber has generally been decomposed, in which the pathogens and insect eggs have been basically killed. Therefore, the third chamber is mainly used to temporarily store the basically harmless manure liquid.
Solid sludge in the FRP septic tanks shall be removed promptly to avoid sludge clogging the pipes.
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