Rubber membrane disc microporous aerator

• Product Overview

The rubber membrane disc micro-pore aerator is a core aeration device designed and manufactured by our company for aerobic biological wastewater treatment processes. This product utilizes an elastic rubber membrane with fine micro-pores as its core diffusion element, aiming to generate dense and uniform microbubbles. This design enhances the transfer efficiency of atmospheric oxygen into wastewater, provides dissolved oxygen required for microbial pollutant degradation, and facilitates internal mixing within the tank.

• Structure and Working Principle

1. Core structural composition

The device is a modular unit, primarily including:

• Elastic rubber diaphragm: A key functional component, fabricated from materials such as ethylene propylene diene monomer (EPDM) and silicone rubber, with numerous micropores laser-cut or die-cast on the surface. The diaphragm is secured to the base plate via a cover or clamp, forming a collapsible cavity.
• Chassis and support components: Typically made of engineering plastics (ABS) or stainless steel, these components support the diaphragm, distribute airflow, and connect to the air distribution piping. A check valve plate is usually integrated at the chassis air inlet to prevent sewage backflow during air shutdown.
• Aeration piping system: Conveying air from the blower to aeration units, typically using UPVC or ABS pipes.

2. Working Principle

The compressed air enters the aeration device through the pipeline, where the air pressure causes the elastic rubber diaphragm above to expand. The air then escapes through the micro-pores on the diaphragm, forming numerous tiny bubbles in the water.

• Aeration state: During gas supply, the diaphragm micropores open under air pressure.
• At rest: When gas supply is stopped, the diaphragm adheres to the base under hydrostatic pressure, with micropores closed, which helps prevent sewage and impurities from entering the interior, thereby reducing the risk of clogging.
• Core technical features

1. Dynamic micro-pore and anti-clogging characteristics: The "stretchable" design of the elastic membrane allows the micro-pores to close when gas supply is interrupted, which may help reduce impurity intrusion and pore blockage, making maintenance relatively simple.
2. Oxygen transfer efficiency: The generated bubbles are fine and uniform, with a large gas-liquid contact area, which typically contributes to higher oxygen transfer efficiency and may positively impact the reduction of system operational energy consumption.
3. Membrane materials are available in EPDM (resistant to general sewage) and silicone rubber (oil-resistant and heat-resistant), designed to handle various water conditions including oily and acidic/alkaline environments.
4. Operating resistance and energy consumption: The resistance remains relatively stable during initial installation. Over time, resistance variations depend on water quality and maintenance conditions. Regular cleaning helps maintain performance.
5. Installation and Maintenance: During installation of the disc structure, attention must be paid to the flatness of the pool bottom to ensure uniform gas distribution. When replacing the diaphragm, typically only the diaphragm assembly needs to be replaced, without moving the base or pipes.

• Main technical parameters

• Typical Application Fields

This equipment is suitable for various aeration biological treatment processes:

• Municipal wastewater treatment: aerobic tanks for processes including AAO, oxidation ditch, SBR, and MBR.
• Industrial wastewater treatment: biochemical aeration tanks for food, chemical, paper, pharmaceutical, textile and other industries.
• Other: Aeration and oxygenation projects for river channels and landscape water bodies.