Introduction

Continuing our deep dive from Unlock the Secret: How Inlet COD Dictates MBBR Biofilm Carrier Pore Selection in Wastewater Treatment, we reveal actionable strategies for selecting MBBR carrier pores, backed by science and real - world results.

3 Golden Rules for Pore Selection

1. Match COD Load to Carrier Design

· High COD: Opt for fewer pores (e.g., K1/K2) with larger diameters to balance surface area and flow.

· Low COD: Choose more pores (e.g., K4/K5) for maximum microbial contact.

2. Prioritize Hydraulic Stability

· High - pore carriers reduce porosity, ideal for low - COD systems.

· Low - pore carriers enhance flow, critical for high - COD robustness.

3. Balance Cost & Performance
Avoid over - engineering: Test carriers to find the sweet spot between efficiency and operational costs.

COD Concentration (mg/L)	Packing Pore Characteristics	Specific Surface Area (m2/m3)	Application Scenarios
> 1000	Low pore number, large pore	< 500	Industrial wastewater, high - concentration organic wastewater
500–1000	Medium pore number, medium pore	500–1000	Mixed sewage, municipal sewage enhanced treatment
< 500	High pore number, small pore	> 1000	Low - concentration sewage, advanced treatment
Comprehensive consideration for specific situations

Case Study: SmallBoss PE38 in Action

A mid - sized municipal plant treating 500 mg/L COD wastewater faced rising costs. After rigorous testing:

· Solution: SmallBoss PE38 (38 - pore) carriers.

· Results:

· 98% COD removal efficiency

· 20% reduction in aeration energy

· Zero clogging over 2 years

Why PE38?

· Optimized surface area (200 m2/m3)

· Unique turbulence - promoting geometry

· FDA - approved polyethylene for durability