
500L~3000L Underground PE Plastic Bio Digester Septic Tank for Sewage Water Treatment. HDPE Durability: High-density polyethylene material resists corrosion, cracking, and rust for a 20-year lifespan. Three-Compartment Design: Utilizes anaerobic fermentation across three pools for efficient sewage interception and treatment. Certified Quality: CE and SGS certified with comprehensive customs clearance certificates (FORMA, FORM E, etc.). 24-Month Warranty: Comprehensive 24-month warranty coverage with online technical support available. Easy Installation: Lightweight design allows for fast construction, gravity transfer, and easy displacement. Chemical Resistance: Unaffected by chemicals in sewage and soil, ensuring stability in fluctuating weather conditions. Full Sealing Performance: Complete seal prevents any contamination leakage, protecting the surrounding environment.