1. Choose Suitable Surface Area Based on Load

Specific surface area dictates the quantity of microbes the carrier can host. It is the most critical performance parameter for MBBR media:

• Standard applications: Select media with 500–1200 m²/m³, perfect for regular municipal sewage and low-load wastewater
• High-load scenarios: Adopt high-density media of 800–1000+ m²/m³ to boost pollutant decomposition capacity

2. Select Geometry According to Tank Zones

Media shape determines fluidization effect and application scenarios. Different structures fit diverse biochemical environments:

• 15–20mm cylindrical media: Features optimal fluidization performance, the mainstream option for aerobic reaction tanks
• Porous sphere media: Designed for anaerobic & anoxic zones, ideal for denitrification and phosphorus removal work

3. Control Density for Energy Saving

The optimal density range for qualified MBBR carrier is 0.97–1.03 g/cm³.

Media within this range can suspend and flow evenly in water with basic aeration. It effectively avoids sinking or floating aggregation, greatly cutting your daily aeration energy costs.

4. High Voidage to Avoid Clogging

Always choose media with 75%–90% porosity (voidage).

High voidage ensures unobstructed water and oxygen circulation inside carriers. It prevents biofilm accumulation and clogging, reducing equipment maintenance frequency and downtime.

5. Premium Material for Long Service Life

Material quality decides the service cycle and overall input cost:

• Raw material: Virgin HDPE/PP with professional UV stabilizers
• Service lifespan: Stable performance for 15–20 years
• Temperature resistance: Works normally at a low temperature of 5°C, adaptable to cold climate areas

6. Match Media With Wastewater Type

• Municipal wastewater: Prioritize high specific surface area MBBR media to accelerate biofilm reproduction
• Industrial wastewater: Focus on chemical-resistant PP/HDPE carriers to resist corrosive wastewater components