400 Person Package Treatment Plant

Designed for a capacity of 300-500 people for medium-sized settlements and businesses:

• Medium-sized hotels — holiday resorts with 50-100 rooms
• Apartment complexes — complexes with 80-150 apartments
• School campuses — primary-secondary schools, kindergartens
• Health centers and clinics — small health facilities
• Industrial campuses — small-medium factories
• Sports facilities and camps — summer schools, youth camps

Typical usage examples:

• 300-room 4-star hotel: Sufficient capacity for high occupancy during the summer season, reclaimed water for irrigation.
• 150-unit residential complex: To avoid overloading the municipal wastewater system in medium-large city center housing projects.
• Private school with 500 students: Dining hall + sports facilities + service workshop treated in a single facility.
• 75-bed hospital: UV disinfection is mandatory for healthcare wastewater — standard addition at these capacities.

The technology we recommend for this capacity:

• Classic biological activated sludge — basic setup
• MBR optional — if 95% of the treated water will be reused for irrigation
• UV disinfection — mandatory for hospital/hotel/public facilities
• Advanced N-P removal — if there are strict discharge limits

*The MBR + UV combination is common in hotel/hospital projects.*

Technical specifications (400 people / 75-80 m³/day):

• Reactor material: ST37 carbon steel, 4-6 mm thickness
• Corrosion protection: Epoxy paint or bituminous coating, 15-20 years lifespan
• BOD removal: 92-96% (inlet 300-400 mg/L → outlet 15-20 mg/L)
• COD removal: 88-94% (inlet 600-800 mg/L → outlet 80-100 mg/L)
• SS removal: 95+% (outlet 20-30 mg/L)
• NH4-N removal: 85-90% (advanced biological process)
• Automation: PLC controlled, SCADA remote monitoring optional
• Energy consumption: Typical 0.4-0.7 kWh/m³ of treated water
• Footprint: Reactor only + 1 m service area
• Warranty: Mechanical 12 months, body 5 years
• Certificates: CE, ISO 9001, ISO 14001

Investment analysis for a system of 400 people:

• Annual treated water: ~29,200 m³
• Reusable water (for irrigation): ~24,820 m³ (85%)
• Operational savings (water bill): Between 25-40% of total annual water expenses
• Avoidance of municipal sewer fees: Additional savings of +30-50% depending on the region
• Prevention of environmental compliance penalties: Severe penalties for exceeding discharge limits
• Estimated payback period: Typically between 2-4 years
• Equipment lifespan: 15-20 years (over 70% of investment lifespan is profit)
• Sustainability: Direct contribution to the conservation of water resources