Membrane Fine Bubble Diffuser

Product Overview

The Membrane Fine Bubble Diffuser is an advanced aeration device designed to efficiently transfer oxygen in wastewater treatment systems.
It generates uniform fine bubbles through precision-perforated membranes, enhancing oxygen dissolution and promoting microbial growth.
The diffuser offers high oxygen transfer efficiency (OTE), low energy consumption, and long service life, making it ideal for biological aeration processes.

Working Principle

Compressed air passes through the air distribution system and enters the diffuser.
The flexible EPDM or silicone membrane expands under pressure, allowing air to pass through fine perforations to form tiny bubbles.
When aeration stops, the membrane closes automatically, preventing backflow and clogging.

Main Components

• Diffuser body: ABS or PVC engineering plastic

• Membrane: EPDM, silicone, or PTFE-coated

• Air inlet: Standard threaded or clamp-type connector

• Check valve: Integrated anti-backflow design

• Support base: Stainless steel or plastic frame

Features

• Fine bubble diameter (1–3 mm) for excellent oxygen transfer

• High OTE and low system backpressure

• Corrosion-resistant and anti-aging materials

• Self-closing membrane prevents clogging and backflow

• Easy installation and low maintenance

• Available in disc (Φ215–Φ350 mm) or tube (Φ65×1000 mm) types

Applications

• Municipal and industrial wastewater treatment

• Biological aeration tanks (SBR, MBBR, A/O, A²/O)

• Equalization and oxidation ditches

• Aerobic and nitrification systems

Optional Configurations

• Membrane material: EPDM, silicone, or PTFE

• Type: Disc, tube, or plate diffuser

• Mounting system: Fixed frame or quick-release

• Air flow range: 1–12 m³/h per unit

• Custom connectors and pipeline sizes

     Jiangsu Sanhe Environmental Protection Group Co., Ltd., formerly Jiangsu Sanhe Environmental Protection Equipment Co., Ltd., is located on the scenic shores of Lake Taihu. It is a renowned manufacturer and developer of modern environmental protection and water treatment equipment in China. It comprises several subsidiaries, including Jiangsu Sanhe Environmental Engineering Co., Ltd. and Yixing Sanhe Environmental Protection Design Institute Co., Ltd. The parent company has a registered capital of 100.2 million yuan, a building area of ​​over 20,000 square meters, and a staff of 52 technicians. The company boasts not only strong environmental protection equipment production and R&D capabilities, but also a highly qualified team with over 30 years of experience in environmental protection equipment production and service, a passion for environmental protection, and a commitment to integrity.

     After nearly 30 years of continuous effort, our innovative development of new products, technologies, materials, and processes, along with our expertise, has been widely adopted in the industry. We have developed advanced continuous-flow activated carbon filters and differential fully automatic backwash filters specifically for reclaimed water reuse and zero-discharge projects. We have also independently developed high-efficiency activated carbon suitable for flow-through activated carbon towers, resolving challenges in China due to poor adsorption performance, short service life, saturation, and high operating costs, hindering widespread adoption and ensuring long-term effective use of activated carbon.

    ​Since its establishment, Jiangsu Sanhe Environmental Protection Group Co., Ltd. has provided qualified products and services to nearly a thousand renowned domestic and international manufacturers, including municipal sewage treatment plants, the machinery and chemical industry, CNPC, Sinopec, Baosteel Group, Jiangxi Copper Group, Dongfeng Nissan, Dongfeng Motor Corporation, commercial passenger vehicle companies, Hangzhou Luxgen, Great Wall Motors, Dongfeng Peugeot Citroen Automobile, Dongfeng Yangzijiang Bus, CSR Corporation, and the Tarim Oilfield, earning a strong reputation. We are grateful to all our friends who have given us opportunities and helped us grow!

     We firmly believe in down-to-earth and steady development; we advocate scientific innovation and unremitting pursuit; and we promote energy-saving, low-carbon, and green living. We provide our customers with ingenious products and services and strive to establish our company as a leading modern enterprise in China's environmental protection production, research, and development sectors.