20 Person Sewage Treatment System

20-Person Marine Sewage Treatment System | Compact & IMO-Certified Solution

Efficient Black Water Treatment for Small Vessels & Marine Applications

Our SWCM(I)-20 marine sewage treatment device system provides compact, reliable wastewater processing for vessels requiring 20-person capacity (max 22 persons). This marine sanitation device combines advanced biological treatment with UV disinfection to deliver IMO MEPC 227(64)/284(71) compliant effluent – perfect for yachts, fishing boats, patrol vessels, and small commercial ships.

Key Features & Benefits

✔ Ultra-Compact Design – Ideal for space-limited marine installations
✔ Four-Stage Treatment Process – Biological oxidation + membrane filtration + UV sterilization
✔ Chemical-Free Operation – UV system eliminates 99.9% of bacteria without chlorine residues
✔ Durable Marine-Grade Construction – Epoxy-coated steel for maximum corrosion resistance
✔ Fully Automated – Integrated control panel for maintenance-free operation
✔ Globally Certified – IACS-approved (ABS, BV, CCS, DNV, LR, NK, KR, RMRS, RINA)

Technical Specifications

Treatment Capacity & Performance

Rated Capacity: 20 persons | Peak Capacity: 22 persons
Effluent Quality Exceeds IMO Standards:
✅ BOD5 ≤ 25 mg/L (Biological Oxygen Demand)
✅ COD ≤ 125 mg/L (Chemical Oxygen Demand)
✅ TSS ≤ 35 mg/L (Total Suspended Solids)
✅ Coliforms ≤ 100/100mL
✅ pH 6-8.5 | Residual Chlorine ≤ 0.5 mg/L

Dimensions & Build Quality

Construction Material: Marine-grade steel with sandblasted surface & epoxy coating
Footprint (L×W×H): 1800 × 1450 × 1750 mm
Weight: Dry – 1450 kg | Operational – 3826 kg

Core System Components

Component	Specifications	Key Advantage
Biological Reactor	Aeration + contact oxidation + membrane filtration	Removes 95%+ organic waste
Maceration Pump	0.5CWF-8 (0.75 kW, 5 m³/h)	Efficient solids grinding
Air Blower	RB 210-7AH16T (0.55 kW, 80 m³/h)	Low-energy aeration
Discharge Pump	25ZB-2-20 (0.75 kW, 2 m³/h)	Reliable effluent transfer
UV Sterilizer	JX-0.5UV (220V, 50Hz)	Chemical-free disinfection
Control Panel	321DF-1M-01YL	Automated operation

Advanced Treatment Technology

Biological Digestion – Aerobic bacteria breakdown organic pollutants
Membrane Bio-Reactor (MBR) – 0.1 micron filtration removes suspended solids
UV-C Sterilization – 254nm wavelength destroys 99.9% of pathogens
Anti-Fouling Design – Automatic backwash extends membrane life

Certifications & Compliance

Full Compliance With:
- IMO MEPC 227(64) & MEPC 284(71)
- MARPOL Annex IV Regulations
Optional IACS Certifications: ABS, BV, CCS, DNV, GL, LR, NK, KR, RMRS, RINA