Coarse Bubble Disc Diffusers: Why Choose Them & Where They Excel
By: Kate Nana
Post Date: June 11th, 2025
Email:info@aquasust.com
Post Tags: Disc Diffuser，Coarse Bubble Disc Diffuser，WastewaterSolutions，sewagetreatment ，plantsite ，constructionsite
In wastewater treatment processes, aeration systems account for the highest energy consumption (typically 50%-70%). Their selection directly determines treatment efficiency and operational costs. As mainstream technical approaches, Coarse Bubble Disc Diffusers and Fine Bubble Disc Diffusers each possess irreplaceable advantages.
This article thoroughly analyzes the core value of coarse bubble disc diffusers and provides selection recommendations based on engineering practices.
1.Four Core Advantages of Coarse Bubble Disc Diffusers
1. Strong Anti-Clogging Performance
- Pore Characteristics: Bubble diameter typically 2-10mm (vs. 0.5-3mm for fine bubble). More open pore structure.
- Applicable Water Quality: Effectively treats wastewater with high SS (suspended solids), oils, and fibers (e.g., food processing, papermaking effluent) without pore clogging.
▶ Comparison: Fine bubble diffusers require regular acid cleaning and may suffer from uneven aeration due to clogging in complex wastewater.
2. Low Maintenance Costs
- No precision membrane structure. Low physical wear rate. Service life up to 10 years.
- Eliminates need for dedicated cleaning systems, reducing O&M labor costs by >30%.
3. High Shock Load Resistance
- Superior adaptability to fluctuations in water quality/quantity, especially suitable for non-steady-state operating conditions in industrial wastewater treatment.
4. High Installation Fault Tolerance
- Low sensitivity to pipeline levelness. Maintains effective aeration even during tank bottom settlement/deformation.
2.Typical Application Fields for Coarse Bubble Disc Diffusers
Based on the correlation between bubble size and Oxygen Transfer Efficiency (OTE), coarse bubble disc diffusers are more competitive in:
3.Coarse vs. Fine Bubble Diffusers: Key Parameter Comparison
4.Scientific Selection Methodology
Follow the "Water Quality First, Efficiency Balanced" principle:
1. Prioritize Fine Bubble Disc Diffusers: Municipal WWTPs, new projects with stable water quality (pursuing high OTE).
2. Prioritize Coarse Bubble Disc Diffusers:
- Influent SS >80 mg/L or containing oils/fibers
- Space-constrained deep-tank designs (advantages amplified at >6m depth)
- Regions with limited O&M capabilities
> Case Studies:
> - Paper Mill A Wastewater Station: Originally used fine bubble diffusers. Annual maintenance costs increased by 40% due to fiber clogging. After switching to coarse bubble, failure rate decreased by 90%.
> - Municipal WWTP Expansion Section: Stable low-SS influent. Fine bubble diffusers reduced energy consumption by 25%.
Conclusion
Coarse bubble disc diffusers are not "outdated technology" but a rational choice for complex water quality and low-maintenance scenarios. Under the "Dual Carbon Goals" (peak carbon & carbon neutrality), technical biases must be abandoned. Life Cycle Cost (LCC) should be prioritized to build adaptive aeration solutions.
Environmental Tech — Wastewater Treatment — Aeration Systems — Industrial Wastewater
Aquasust provides comprehensive wastewater treatment solutions(mbbr media water treatment) and is a professional supplier(mbbr media suppliers) of sewage treatment equipment. We manufacture core products including MBBR media, Disc diffusers, Tube diffusers, Drum Filter and Tube settlers, committed to delivering high-quality products for the global water treatment sector.
