Fine bubble diffusers

Fine bubble diffusers are a pollution control technology used to aerate wastewater for sewage treatment.

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Description

Fine bubble diffusers produce a plethora of very small air bubbles which rise slowly from the floor of a wastewater treatment plant or sewage treatment plant aeration tank and provide substantial and efficient mass transfer of oxygen to the water.[1] The oxygen, combined with the food source, sewage, allows the bacteria to produce enzymes which help break down the waste so that it can settle in the secondary clarifiers or be filtered by membranes. A fine bubble diffuser is commonly manufactured in various forms: tube, disc, plate, and dome.[2]

Bubble size

The subject of bubble size is important because the aeration system in a wastewater or sewage treatment plant consumes an average of 50 to 70 percent of the energy of the entire plant.[3] Increasing the oxygen transfer efficiency decreases the power the plant requires to provide the same quality of effluent water. Furthermore, fine bubble diffusers evenly spread out (often referred to as a 'grid arrangement') on the floor of a tank, provide the operator of the plant a great deal of operational flexibility. This can be used to create zones with high oxygen concentrations (oxic or aerobic), zones with minimal oxygen concentration (anoxic) and zones with no oxygen (anaerobic). This allows for more precise targeting and removal of specific contaminants.

The importance of achieving ever smaller bubble sizes has been a hotly debated subject in the industry as ultra fine bubbles (micrometre size) are generally perceived to rise too slowly and provide too little "pumpage" to provide adequate mixing of sewage in an aeration tank. On the other hand, the industry standard "fine bubble" with a typical discharge diameter of 2 mm is probably larger than it needs to be for many plants. Average bubble diameters of 0.9 mm are possible nowadays, using special polyurethane (PUR) or special recently developed EPDM membranes.[3]

Fine bubble diffusers have largely replaced coarse bubble diffusers and mechanical aerators in most of the developed world and in much of the developing world. The exception would be in secondary treatment phases, such as activated sludge processing tanks, where 85 to 90 percent of any remaining solid materials (floating on the surface) are removed through settling or biological processes. The biological process uses air to encourage bacterial growth that would consume many of these waste materials, such as phosphorus and nitrogen that are dissolved in the wastewater. The larger air release openings of a coarse bubble diffuser helps to facilitate a higher oxygen transfer rate and bacterial growth. One disadvantage of using fine bubble diffusers in activated sludge tanks is the tendency of floc (particle) clogging the small air release holes.[4]

The company is the world’s best best diffuser for water treatment supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.

See also

• List of waste-water treatment technologies

Disc Diffuser Treatment Applications

Disc diffusers from SSI Aeration, Inc. are most commonly used in wastewater treatment systems. Our products are used in the aeration portion of the wastewater treatment process. Professionals who use aeration disc diffusers include:

• Original equipment manufacturers (OEMs): Wastewater treatment OEMs use our components as part of comprehensive systems that make water cleaner.
• Contractors: Professional contractors can build new systems or make repairs with our top-quality diffusers.
• Consulting engineers: Engineers who assist in the development of new treatment systems can recommend our products as part of their specifications.
• Wastewater treatment plants: Treatment plants that buy their parts directly from manufacturers choose our diffusers for their efficiency and quality.
• Distributors and representatives: Product distributors work with us to provide industries across the world with top-quality components.

We encourage you to contact one of our experts for more information on the uses of our diffuser product lines. Our consultants can also assist you in meeting your area&#;s regulations for water treatment.

Installation and Design Services Available From Our Engineers

At SSI Aeration, Inc., our team of experienced engineers can offer system design and product consultation services. Our comprehensive design services include calculations, hydraulic studies, and process simulations. We tailor these tests to your local environment and required site regulations to ensure your system works in its intended application. You can count on us to tap into our years of industry experience to give you insightful and relevant advice.

As part of our system design services, we also offer the SSI Technology Portal. The software and resources available from this page let you create an aeration system that fits your specifications. Create custom price estimates and drawings that we can use to serve you better.

Contact us to discuss your requirements of how do fish tank filters work. Our experienced sales team can help you identify the options that best suit your needs.