SSI

SSI – A Global Leader in Wastewater Treatment Equipment

SSI is a global leader in the design and manufacture of wastewater treatment plant equipment.

Our company produces innovative, durable, and energy-efficient membrane diffuser systems. Our product range includes fine bubble diffusers, coarse bubble diffusers, and aeration systems.

At SSI, we focus on providing innovative solutions for both industrial wastewater treatment plants and municipal sewage treatment plants.

We founded our company in 1995 in Poughkeepsie, New York. We produced our first fine bubble diffuser in 1997.

Since then, we have focused on accelerating biological wastewater treatment processes with our research and development (R) efforts for over 20 years.

In this process, we have introduced many patented products and technologies to the industry, such as advanced fine bubble diffuser membrane materials, innovative production techniques, and simple but effective locking systems.

We offer a complete design service that includes biological and mixing calculations, process simulations, and hydraulic studies.

How Do Diffusers Work?

In diffused aeration, oxygen is mixed with wastewater, allowing anaerobic bacteria to break down biological solid particles in the water.

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SSI 91 mm Tube Diffuser AFTS 3100

SSI Aeration's fine bubble tube diffuser boasts exceptional chemical and fouling resistance thanks to its advanced membrane materials.
Max. Flow Rate : 3.4 - 22 Sm3/h
Max. Pressure : bar
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Membranes

The performance of our diffusers used in wastewater aeration systems is guaranteed by high-quality membrane materials.
Max. Flow Rate : l/h
Max. Pressure : bar
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SSI Ect 70 Hybrid Tube Type Diffusers

These are hybrid tube type diffusers used in domestic and industrial wastewater treatment plants to meet the oxygen demand of wastewater.
Max. Flow Rate : 1.7-13.5 Sm3/h
Max. Pressure : bar
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SSI 12” Disk Diffuser System

SSI 12” Disk Diffuser Systems combine engineering excellence, superior component quality, and a technically advanced product concept.
Max. Flow Rate : 4.2 - 8.3 Nm3/h
Max. Pressure : bar
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SSI 20” Disk Diffuser

Fine bubble disc diffusers, as a critical component of wastewater treatment systems, support the efficient operation of the treatment process by providing aeration.
Max. Flow Rate : l/h
Max. Pressure : bar
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SSI ReliaBall® Thick Bubble Jet Diffuser

The Relia-Bill™ coarse bubble jet diffuser is a non-clogging type diffuser that automatically shuts off and becomes completely leak-proof when the airflow is interrupted. Unlike stainless steel wideband diffusers, this model is not clogged by sediment buildup in the tank.
Max. Flow Rate : 4 SCFM / 7 Sm³/h
Max. Pressure : 10” WG / 25 mbar
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SSI Thick Bubble Diffuser Wide Band

SSI Aeration's Wide Band diffusers offer exceptional durability and long-lasting performance in wastewater treatment applications.
Max. Flow Rate : 0 - 17 Nm3/h
Max. Pressure : bar
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SSI Thick Bubble AFC Cap Diffusers

AFC diffusers with covers are designed with black acrylic plastic material made from EPDM composite. SSI has also achieved superior performance in its fine bubble disc diffusers by using the same material.
Max. Flow Rate : 0-17 Nm³/h
Max. Pressure : bar
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SSI 62 mm Tube Diffuser AFTS 2100

SSI Aeration's fine bubble tube diffuser boasts exceptional chemical and fouling resistance thanks to its advanced membrane materials.
Max. Flow Rate : 4.2 - 8.3 Sm3/h
Max. Pressure : bar
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SSI 9” Disk Diffuser System

The SSI 9” Disk Diffuser System combines engineering excellence, superior component quality, and advanced design technology.
Max. Flow Rate : 2.5 - 5.0 Nm3/h
Max. Pressure : bar
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SSI Design Services

Technical SSI is a diffuser manufacturer and technical partner that provides all services. We have many technical capabilities, including 2D and 3D drafting, biological simulation with Biowin™ software, CFD mixing simulation, FEM analysis of heavy-duty applications, seismic calculations, buoyancy calculations, heat transfer calculations, and benchmarking.

We provide laboratory services for the analysis of pilot-scale diffuser samples compared to control samples, forensic analysis of failures, oxygen transfer efficiency tests in clean and treated water, and pressure loss tests.

As an established company, SSI has an incredible depth of knowledge and experience, thanks to the involvement of the founding partners in the company's daily operations. By combining this experience and knowledge with modern simulation tools and the highest quality innovative products, we provide you with the opportunity to install a successful system that will serve you for many years.

We work with a team of 15 mechanical engineers who can provide a very quick turnaround on your quote requests, including layout drawings, a detailed scope, and a calculation sheet for each quote. We can assist with specifications and CAD drawings.

How Do Diffusers Work?

In diffused aeration, oxygen is mixed with wastewater, allowing anaerobic bacteria to break down biological solid particles in the water.

What is Aeration?

In diffused aeration, oxygen is mixed with wastewater, allowing anaerobic bacteria to break down biological solid particles in the water. During this process, the introduction of air into the water improves the biological treatment process by increasing the dissolved oxygen content of the wastewater.

This method allows substances that create taste and odor, gases, metals such as iron, and other pollutants to be removed from the water.

How Does Diffused Aeration Work?

In this process, compressed air produced by the aeration blower is passed through diffusers, creating bubbles under the surface of the wastewater.

✔ Bacteria are continuously supplied with oxygen, allowing them to break down solids in the water.

✔ As oxygen bubbles rise to the surface of the water, they mix with the water, increasing the dissolved oxygen content of the wastewater.

✔ This increase in oxygen keeps the bacteria suspended in the water, allowing for a more effective breakdown of solids.

Types of Diffused Aeration Systems

Diffused aeration systems are divided into 2 main types:

Fine Bubble Aeration System

  • Provides high-efficiency oxygen transfer.
  • More commonly preferred in biological treatment processes.
  • Ideal for applications with maximum ventilation requirements.

Coarse Bubble Aeration System

  • Increases the amount of dissolved oxygen in wastewater by creating larger bubbles.
  • Has a higher mixing capacity, keeping sediments suspended in the water.
  • More suitable for applications focused on increasing dissolved oxygen levels.