Sewage Treatment Plant with Daily Treatment Capacity of 20,000 m³

1. Scale: 20,000 m³/d, medium-sized sewage treatment plant
2. Location: Xinjiang, China (features: low winter temperatures, large diurnal temperature variation, high evaporation, water scarcity)
3. Wastewater Type: Domestic sewage
4. Core Process: Pretreatment + 5‑stage Bardenpho Bioreactor + MBR Membrane Bioreactor + Advanced Disinfection
5. Effluent Standard: Grade I A of China’s national discharge standard

• Removes large debris and grit to protect precision equipment (especially MBR membranes).
• Critical for Xinjiang’s high grit conditions.

• 1st Anoxic Zone: Denitrification using influent carbon source and returned sludge.
• 1st Aerobic Zone: BOD/COD removal, nitrification, and biological phosphorus uptake.
• 2nd Anoxic Zone: Advanced denitrification to further reduce total nitrogen.
• 2nd Aerobic Zone: Residual BOD removal, nitrogen stripping, and phosphorus release prevention.
• Sludge/Mixed Liquor Recycle: Key for high-efficiency nitrogen removal.
• Advantage: Achieves ultra-high nitrogen and phosphorus removal without excessive external carbon.

• Replaces secondary sedimentation tank; uses micro/ultrafiltration membrane (<0.1 μm) for solid–liquid separation.
• Delivers high-quality effluent: near-zero turbidity, extremely low SS.
• Maintains high MLSS, strong shock resistance, and small footprint.
• Retains nitrifying bacteria efficiently, ensuring stable performance in low temperatures (ideal for Xinjiang).

• UV, sodium hypochlorite, or ozone disinfection guarantees fecal coliform meets Grade I A standard.

1. Low-Temperature Operation

   Prevent icing in bioreactors; antifreeze for membrane systems and pipelines; heat tracing and insulation for outdoor pipes/valves.

2. MBR Membrane O&M

   Strict online maintenance and offline recovery cleaning; monitor TMP and flux; prevent fiber/ hair damage to membranes.

3. Water Quality Fluctuation

   Monitor C/N ratio; supplement external carbon (e.g., sodium acetate) in winter if needed.

4. Energy Saving

   Precise aeration control, high-efficiency blowers, optimized membrane scouring frequency.

5. Sludge Treatment

   Thickening, dewatering, and disposal; natural drying can be used in dry climate.

The combination of 5‑stage Bardenpho + MBR is scientific, advanced, and climate-adapted for Xinjiang. It stably meets Grade I A standard. The project is in normal operation, demonstrating Zhongqiao Enlightenment’s strong capabilities in engineering design, construction, and operation.

Founded in 2013, Zhongqiao Enlightenment is a high-tech enterprise integrating R&D, design, manufacturing, installation, commissioning, operation, and consulting.

• Main products: integrated wastewater treatment equipment, DAF machines, non-standard sewage treatment equipment.
• Qualifications: Class II Construction Mechanical & Electrical Installation, Class II Environmental Engineering, Safety Production License.
• Intellectual property: 60+ utility model patents, 17 invention patents, 27 software copyrights.
• Certifications: CEP, triple system certification.
• Honors: High-Tech Enterprise, Specialized & Sophisticated “Little Giant”, Hidden Champion, Shandong Famous Brand, etc.