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Disc Aerator
Our Disc Aerator is a high-efficiency, energy-saving diffusion-type aeration equipment specifically engineered for municipal and industrial water/wastewater treatment systems, widely applied in aerobic biochemical processes. As a mainstream aeration solution since its development in the 1980s, it features a compact circular disc structure, integrating a corrosion-resistant base, high-elasticity microporous membrane, and precision air distribution system. By converting compressed air into uniform fine bubbles (1–3mm in diameter) through micron-level pores on the membrane, it maximizes gas-liquid contact area and oxygen transfer efficiency, providing sufficient dissolved oxygen (DO) for aerobic microorganisms. This product effectively enhances pollutant degradation efficiency, reduces energy consumption, and ensures stable operation of water treatment systems, fully complying with global standards including ISO 9301:2021, ISO 14001:2015, EU Urban Wastewater Treatment Directive (EU 2024/3019), US EPA Effluent Guidelines, and CJ/T 294-2018. It has become an indispensable core component for efficient, low-carbon wastewater treatment projects worldwide, suitable for both new construction and renovation of aeration tanks.
Product Description
Our Disc Aerator is a high-efficiency, energy-saving diffusion-type aeration equipment specifically engineered for municipal and industrial water/wastewater treatment systems, widely applied in aerobic biochemical processes. As a mainstream aeration solution since its development in the 1980s, it features a compact circular disc structure, integrating a corrosion-resistant base, high-elasticity microporous membrane, and precision air distribution system. By converting compressed air into uniform fine bubbles (1–3mm in diameter) through micron-level pores on the membrane, it maximizes gas-liquid contact area and oxygen transfer efficiency, providing sufficient dissolved oxygen (DO) for aerobic microorganisms. This product effectively enhances pollutant degradation efficiency, reduces energy consumption, and ensures stable operation of water treatment systems, fully complying with global standards including ISO 9301:2021, ISO 14001:2015, EU Urban Wastewater Treatment Directive (EU 2024/3019), US EPA Effluent Guidelines, and CJ/T 294-2018. It has become an indispensable core component for efficient, low-carbon wastewater treatment projects worldwide, suitable for both new construction and renovation of aeration tanks.
Unlike traditional aeration equipment (such as fixed spiral aerators, diffused aerators, and perforated pipe aerators) that suffer from low oxygen utilization, uneven aeration, and frequent clogging, our Disc Aerator solves these industry pain points through optimized structural design and high-quality materials. With an oxygen utilization rate of 18.4–27.7% (at 3.2m water depth) and oxygen transfer efficiency (OTE) of 20–40% , it reduces fan energy consumption by 15–40% compared to traditional products, or increases wastewater treatment capacity by 40% under the same energy input. Its elastic membrane with automatic opening and closing function effectively prevents sludge backflow and clogging, while the compact disc structure ensures uniform aeration without dead zones. This product is widely suitable for various water treatment scenarios, from municipal sewage to high-concentration industrial wastewater, adapting to complex water quality fluctuations and intermittent operation modes.
Unlike traditional aeration equipment (such as fixed spiral aerators, diffused aerators, and perforated pipe aerators) that suffer from low oxygen utilization, uneven aeration, and frequent clogging, our Disc Aerator solves these industry pain points through optimized structural design and high-quality materials. With an oxygen utilization rate of 18.4–27.7% (at 3.2m water depth) and oxygen transfer efficiency (OTE) of 20–40% , it reduces fan energy consumption by 15–40% compared to traditional products, or increases wastewater treatment capacity by 40% under the same energy input. Its elastic membrane with automatic opening and closing function effectively prevents sludge backflow and clogging, while the compact disc structure ensures uniform aeration without dead zones. This product is widely suitable for various water treatment scenarios, from municipal sewage to high-concentration industrial wastewater, adapting to complex water quality fluctuations and intermittent operation modes.
Product Feature
Core Structure & Working Principle
Our Disc Aerator is composed of four core components: a corrosion-resistant base (ABS engineering plastic or reinforced polypropylene), a high-elasticity microporous membrane (EPDM, silicone, or fluororubber), stainless steel fasteners, and an optional one-way valve . It operates based on the principle of efficient gas-liquid mass transfer, realizing uniform aeration and high-efficiency oxygen supply through the following mechanisms, seamlessly integrating with various aerobic water treatment processes:
1.Air Distribution & Fine Bubble Formation: Compressed air is delivered to the air chamber of the disc aerator through the air distribution pipeline (usually arranged in a circular network for pressure balance) . When the air pressure reaches the set value (0.02–0.05MPa), the high-elasticity membrane bulges slightly, and the micron-level pores (80–100μm in average diameter) on the membrane open , converting the compressed air into tiny, uniform bubbles (1–3mm in diameter). The precision pore distribution (millions of pores per disc) ensures even bubble release, avoiding local aeration dead zones and ensuring uniform dissolved oxygen distribution in the water.
2.High-Efficiency Oxygen Transfer: The fine bubbles rise slowly in the water, with a rising speed 30–50% lower than that of coarse bubbles . This extends the gas-liquid contact time by 2–3 times and increases the contact area by 10–15 times, significantly improving the efficiency of oxygen transfer from the gas phase to the liquid phase . The dissolved oxygen content in the wastewater can be stably maintained at 2–4mg/L, fully meeting the metabolic needs of aerobic microorganisms, and the oxygen total transfer coefficient kla(20℃) reaches 0.204–0.337min⁻¹ .
3.Self-Cleaning & Anti-Clogging: When the air supply is stopped, the elastic membrane contracts automatically, closing the micro-pores to prevent sludge and sewage backflow, which is the key to avoiding clogging . When the air supply is restarted, the membrane expands again, and the airflow blows off the sludge attached to the membrane surface, realizing self-cleaning. This design effectively solves the clogging problem of traditional aerators, reducing manual cleaning frequency and ensuring stable long-term operation .
4.Synergy with Microbial Degradation: The sufficient dissolved oxygen provided by the fine bubbles promotes the rapid reproduction and metabolism of aerobic microorganisms, which decompose organic matter, ammonia nitrogen, phosphorus, and other pollutants in the wastewater into harmless substances (CO₂, H₂O, nitrogen gas) . The uniform aeration ensures that microorganisms in the entire aeration tank are in an optimal growth environment, improving the overall treatment efficiency and water quality stability—for example, increasing COD removal rate by 9–17% in industrial wastewater treatment projects .
Key Product Advantages
1.High Oxygen Utilization & Energy Saving: The fine bubble design (1–3mm) and uniform air distribution ensure an oxygen utilization rate of 18.4–27.7% (at 3.2m water depth) and oxygen transfer efficiency of 20–40%, which is 2–4 times higher than that of traditional coarse bubble aerators. This reduces fan energy consumption by 15–40% compared to traditional products; a practical case of a large municipal sewage treatment plant shows that annual electricity savings can exceed 800,000 kWh, and the investment payback period is shortened to 2.3 years.
2.Uniform Aeration & No Dead Zones: The compact disc structure and precision-drilled micro-pores ensure uniform bubble release, realizing full coverage of the aeration tank without local oxygen deficiency or over-aeration. The single disc has a service area of 0.25–0.75m², and the reasonable layout density ensures that the dissolved oxygen uniformity in the aeration tank reaches 85% or more, avoiding the impact of uneven aeration on microbial activity.
3.Anti-Clogging & Self-Cleaning: The automatic contraction and expansion of the elastic membrane realize self-cleaning and anti-backflow, effectively preventing sludge and suspended solids from clogging the micro-pores. The smooth membrane surface and special anti-fouling treatment reduce biofilm attachment, and the clogging rate can be reduced to less than 5% with regular maintenance, extending the cleaning cycle to 3–5 years.
4.Durable & Corrosion-Resistant: The base is made of ABS engineering plastic or reinforced polypropylene, and the membrane is made of high-quality materials (EPDM, silicone, or fluororubber) with anti-aging, anti-oxidation, and corrosion-resistant properties . It can withstand long-term operation in acidic, alkaline, and high-salt wastewater (pH 2–12), and the membrane service life is 5–8 years (fluororubber membrane can reach 8–10 years), which is 2–3 times longer than ordinary aerator membranes. The stainless steel fasteners ensure no rust or loosening in harsh water treatment environments.
5.Compact Structure & Easy Installation: Adopting a modular circular disc design (common diameters: Φ215mm, Φ260mm, Φ300mm), it has a small footprint and is easy to install. The connection between the aerator and the air distribution pipeline adopts G3/4 thread (base with internal thread, aerator with external thread), and the installation process is simple: fix the regulator on the pool bottom with expansion bolts, fix the air pipeline with hoops, and install the aerator after the civil engineering is completed. It supports liftable installation, allowing maintenance and replacement without emptying the aeration tank, reducing downtime.
6.Flexible Specifications & Customization: We offer a variety of standard specifications, with single air flow of 1.5–3m³/h per disc, aeration resistance of 180–280mmH₂O, and oxygenation capacity of 0.112–0.185kgO₂/m³h. We provide customized solutions (disc size, membrane material, pore size, service area) according to the aeration tank size, treatment process, and water quality characteristics—such as fluororubber membrane for high-corrosion industrial wastewater and large-diameter discs for large-scale municipal sewage treatment.
7.Wide Adaptability & Versatility: Suitable for various water treatment processes, including activated sludge, AAO, SBR, oxidation ditch, and MBBR. It can adapt to fluctuations in wastewater quality (COD 200–6000 mg/L) and flow, with strong impact load resistance, making it ideal for municipal sewage, industrial wastewater (petrochemical, printing and dyeing, papermaking, pharmaceutical, food processing), river/lake water remediation, and high-density aquaculture. It is also suitable for the renovation of old aeration tanks, improving treatment efficiency without major structural modifications.
8.Global Compliance & Environmental Friendliness: The raw materials are non-toxic, non-polluting, and comply with ISO 14001:2015 environmental standards. The product fully meets international standards (ISO 9301:2021, CJ/T 294-2018) and regional regulations (EU, US EPA), helping customers smoothly pass environmental inspections and meet CSRD compliance and "double carbon" goals.
9.Cost-Effective & Low Maintenance: The long service life and self-cleaning function reduce maintenance and replacement frequency; the membrane can be replaced independently without replacing the entire aerator, reducing maintenance costs by 70%. The lightweight design (single disc weight ≤2kg) simplifies transportation and on-site installation, and the simple structure reduces maintenance difficulty.
Typical Applications
Our Disc Aerator is widely applied in various municipal and industrial water/wastewater treatment scenarios, serving as a core aeration component for efficient aerobic biochemical treatment, and is also suitable for aquaculture and water body remediation:
1.Municipal Sewage Treatment: Aeration tanks in municipal wastewater treatment plants, suitable for AAO, SBR, oxidation ditch, and other processes—with high-density layout (8–10 aerators per square meter) to ensure uniform dissolved oxygen, helping COD degradation rate reach more than 90%. It is especially suitable for large-scale municipal sewage treatment plants with large water volume and stable water quality.
2.Industrial Wastewater Treatment: Treatment of high-concentration organic wastewater from petrochemical, printing and dyeing, papermaking, pharmaceutical, and food processing industries—adopting corrosion-resistant silicone or fluororubber membranes to adapt to acidic/alkaline wastewater, and improving COD removal rate by 9–17% through efficient aeration.
3.Water Body Remediation: River and lake water remediation, artificial lake and landscape water aeration—increasing dissolved oxygen content, inhibiting algae overgrowth, eliminating anaerobic layers, and restoring aquatic ecological balance. Combined with biofilm technology, it can increase ammonia nitrogen removal rate by 1.7 times.
4.Aquaculture: High-density intensive aquaculture pools and factory recirculating aquaculture systems—rapidly improving water dissolved oxygen, reducing diseases, improving aquatic product yield (unit yield can be increased by 22%), and saving energy by 30% compared to surface aeration equipment.
5.Old System Renovation: Replacement of traditional coarse bubble aerators or perforated pipe aerators—improving oxygen transfer efficiency by 20–35% and reducing energy consumption without major structural modifications to the aeration tank, which is widely used in the renovation of old sewage treatment plants.
Why Choose Our Disc Aerator for Water Treatment?
As a professional manufacturer of water treatment aeration equipment, we specialize in the R&D, production, and customization of Disc Aerators. We integrate international advanced membrane technology, precision molding technology, and water treatment engineering experience, strictly controlling each production process—from raw material selection (high-purity EPDM, fluororubber, reinforced polypropylene) to membrane punching, product assembly, and quality testing. Our products comply with international standards such as ISO 9301:2021 and CJ/T 294-2018, with reliable performance and stable quality, and have been verified by more than 50 users and professional institutions.
We provide one-stop services from product customization, technical consultation, on-site installation guidance to after-sales maintenance, tailoring solutions according to the specific parameters of each customer’s water treatment system (aeration tank size, process type, water quality characteristics). Our Disc Aerator has been exported to dozens of countries and regions, widely used in various water treatment projects, and recognized for its high efficiency, energy saving, durability, and ease of maintenance.
In an era of increasingly stringent global water treatment standards and growing demand for energy conservation and carbon reduction, our Disc Aerator helps enterprises optimize operational efficiency, reduce costs, and achieve environmental compliance. Choosing our Disc Aerator is your reliable guarantee for efficient, stable, and sustainable water treatment.
Our Disc Aerator is composed of four core components: a corrosion-resistant base (ABS engineering plastic or reinforced polypropylene), a high-elasticity microporous membrane (EPDM, silicone, or fluororubber), stainless steel fasteners, and an optional one-way valve . It operates based on the principle of efficient gas-liquid mass transfer, realizing uniform aeration and high-efficiency oxygen supply through the following mechanisms, seamlessly integrating with various aerobic water treatment processes:
1.Air Distribution & Fine Bubble Formation: Compressed air is delivered to the air chamber of the disc aerator through the air distribution pipeline (usually arranged in a circular network for pressure balance) . When the air pressure reaches the set value (0.02–0.05MPa), the high-elasticity membrane bulges slightly, and the micron-level pores (80–100μm in average diameter) on the membrane open , converting the compressed air into tiny, uniform bubbles (1–3mm in diameter). The precision pore distribution (millions of pores per disc) ensures even bubble release, avoiding local aeration dead zones and ensuring uniform dissolved oxygen distribution in the water.
2.High-Efficiency Oxygen Transfer: The fine bubbles rise slowly in the water, with a rising speed 30–50% lower than that of coarse bubbles . This extends the gas-liquid contact time by 2–3 times and increases the contact area by 10–15 times, significantly improving the efficiency of oxygen transfer from the gas phase to the liquid phase . The dissolved oxygen content in the wastewater can be stably maintained at 2–4mg/L, fully meeting the metabolic needs of aerobic microorganisms, and the oxygen total transfer coefficient kla(20℃) reaches 0.204–0.337min⁻¹ .
3.Self-Cleaning & Anti-Clogging: When the air supply is stopped, the elastic membrane contracts automatically, closing the micro-pores to prevent sludge and sewage backflow, which is the key to avoiding clogging . When the air supply is restarted, the membrane expands again, and the airflow blows off the sludge attached to the membrane surface, realizing self-cleaning. This design effectively solves the clogging problem of traditional aerators, reducing manual cleaning frequency and ensuring stable long-term operation .
4.Synergy with Microbial Degradation: The sufficient dissolved oxygen provided by the fine bubbles promotes the rapid reproduction and metabolism of aerobic microorganisms, which decompose organic matter, ammonia nitrogen, phosphorus, and other pollutants in the wastewater into harmless substances (CO₂, H₂O, nitrogen gas) . The uniform aeration ensures that microorganisms in the entire aeration tank are in an optimal growth environment, improving the overall treatment efficiency and water quality stability—for example, increasing COD removal rate by 9–17% in industrial wastewater treatment projects .
Key Product Advantages
1.High Oxygen Utilization & Energy Saving: The fine bubble design (1–3mm) and uniform air distribution ensure an oxygen utilization rate of 18.4–27.7% (at 3.2m water depth) and oxygen transfer efficiency of 20–40%, which is 2–4 times higher than that of traditional coarse bubble aerators. This reduces fan energy consumption by 15–40% compared to traditional products; a practical case of a large municipal sewage treatment plant shows that annual electricity savings can exceed 800,000 kWh, and the investment payback period is shortened to 2.3 years.
2.Uniform Aeration & No Dead Zones: The compact disc structure and precision-drilled micro-pores ensure uniform bubble release, realizing full coverage of the aeration tank without local oxygen deficiency or over-aeration. The single disc has a service area of 0.25–0.75m², and the reasonable layout density ensures that the dissolved oxygen uniformity in the aeration tank reaches 85% or more, avoiding the impact of uneven aeration on microbial activity.
3.Anti-Clogging & Self-Cleaning: The automatic contraction and expansion of the elastic membrane realize self-cleaning and anti-backflow, effectively preventing sludge and suspended solids from clogging the micro-pores. The smooth membrane surface and special anti-fouling treatment reduce biofilm attachment, and the clogging rate can be reduced to less than 5% with regular maintenance, extending the cleaning cycle to 3–5 years.
4.Durable & Corrosion-Resistant: The base is made of ABS engineering plastic or reinforced polypropylene, and the membrane is made of high-quality materials (EPDM, silicone, or fluororubber) with anti-aging, anti-oxidation, and corrosion-resistant properties . It can withstand long-term operation in acidic, alkaline, and high-salt wastewater (pH 2–12), and the membrane service life is 5–8 years (fluororubber membrane can reach 8–10 years), which is 2–3 times longer than ordinary aerator membranes. The stainless steel fasteners ensure no rust or loosening in harsh water treatment environments.
5.Compact Structure & Easy Installation: Adopting a modular circular disc design (common diameters: Φ215mm, Φ260mm, Φ300mm), it has a small footprint and is easy to install. The connection between the aerator and the air distribution pipeline adopts G3/4 thread (base with internal thread, aerator with external thread), and the installation process is simple: fix the regulator on the pool bottom with expansion bolts, fix the air pipeline with hoops, and install the aerator after the civil engineering is completed. It supports liftable installation, allowing maintenance and replacement without emptying the aeration tank, reducing downtime.
6.Flexible Specifications & Customization: We offer a variety of standard specifications, with single air flow of 1.5–3m³/h per disc, aeration resistance of 180–280mmH₂O, and oxygenation capacity of 0.112–0.185kgO₂/m³h. We provide customized solutions (disc size, membrane material, pore size, service area) according to the aeration tank size, treatment process, and water quality characteristics—such as fluororubber membrane for high-corrosion industrial wastewater and large-diameter discs for large-scale municipal sewage treatment.
7.Wide Adaptability & Versatility: Suitable for various water treatment processes, including activated sludge, AAO, SBR, oxidation ditch, and MBBR. It can adapt to fluctuations in wastewater quality (COD 200–6000 mg/L) and flow, with strong impact load resistance, making it ideal for municipal sewage, industrial wastewater (petrochemical, printing and dyeing, papermaking, pharmaceutical, food processing), river/lake water remediation, and high-density aquaculture. It is also suitable for the renovation of old aeration tanks, improving treatment efficiency without major structural modifications.
8.Global Compliance & Environmental Friendliness: The raw materials are non-toxic, non-polluting, and comply with ISO 14001:2015 environmental standards. The product fully meets international standards (ISO 9301:2021, CJ/T 294-2018) and regional regulations (EU, US EPA), helping customers smoothly pass environmental inspections and meet CSRD compliance and "double carbon" goals.
9.Cost-Effective & Low Maintenance: The long service life and self-cleaning function reduce maintenance and replacement frequency; the membrane can be replaced independently without replacing the entire aerator, reducing maintenance costs by 70%. The lightweight design (single disc weight ≤2kg) simplifies transportation and on-site installation, and the simple structure reduces maintenance difficulty.
Typical Applications
Our Disc Aerator is widely applied in various municipal and industrial water/wastewater treatment scenarios, serving as a core aeration component for efficient aerobic biochemical treatment, and is also suitable for aquaculture and water body remediation:
1.Municipal Sewage Treatment: Aeration tanks in municipal wastewater treatment plants, suitable for AAO, SBR, oxidation ditch, and other processes—with high-density layout (8–10 aerators per square meter) to ensure uniform dissolved oxygen, helping COD degradation rate reach more than 90%. It is especially suitable for large-scale municipal sewage treatment plants with large water volume and stable water quality.
2.Industrial Wastewater Treatment: Treatment of high-concentration organic wastewater from petrochemical, printing and dyeing, papermaking, pharmaceutical, and food processing industries—adopting corrosion-resistant silicone or fluororubber membranes to adapt to acidic/alkaline wastewater, and improving COD removal rate by 9–17% through efficient aeration.
3.Water Body Remediation: River and lake water remediation, artificial lake and landscape water aeration—increasing dissolved oxygen content, inhibiting algae overgrowth, eliminating anaerobic layers, and restoring aquatic ecological balance. Combined with biofilm technology, it can increase ammonia nitrogen removal rate by 1.7 times.
4.Aquaculture: High-density intensive aquaculture pools and factory recirculating aquaculture systems—rapidly improving water dissolved oxygen, reducing diseases, improving aquatic product yield (unit yield can be increased by 22%), and saving energy by 30% compared to surface aeration equipment.
5.Old System Renovation: Replacement of traditional coarse bubble aerators or perforated pipe aerators—improving oxygen transfer efficiency by 20–35% and reducing energy consumption without major structural modifications to the aeration tank, which is widely used in the renovation of old sewage treatment plants.
Why Choose Our Disc Aerator for Water Treatment?
As a professional manufacturer of water treatment aeration equipment, we specialize in the R&D, production, and customization of Disc Aerators. We integrate international advanced membrane technology, precision molding technology, and water treatment engineering experience, strictly controlling each production process—from raw material selection (high-purity EPDM, fluororubber, reinforced polypropylene) to membrane punching, product assembly, and quality testing. Our products comply with international standards such as ISO 9301:2021 and CJ/T 294-2018, with reliable performance and stable quality, and have been verified by more than 50 users and professional institutions.
We provide one-stop services from product customization, technical consultation, on-site installation guidance to after-sales maintenance, tailoring solutions according to the specific parameters of each customer’s water treatment system (aeration tank size, process type, water quality characteristics). Our Disc Aerator has been exported to dozens of countries and regions, widely used in various water treatment projects, and recognized for its high efficiency, energy saving, durability, and ease of maintenance.
In an era of increasingly stringent global water treatment standards and growing demand for energy conservation and carbon reduction, our Disc Aerator helps enterprises optimize operational efficiency, reduce costs, and achieve environmental compliance. Choosing our Disc Aerator is your reliable guarantee for efficient, stable, and sustainable water treatment.
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