COARSE BUBBLE Aeration SYSTEM

Coarse Bubble Aeration

Maximum Mixing; Minimum Maintenance

Coarse bubble diffuser systems offer moderate oxygen transfer efficiency and low maintenance with maximum mixing. EDI's full spectrum of coarse bubble diffuser platforms provide advances in mechanical reliability, application flexibility, and ease of installation and maintenance.

The primary advantage of this technology is its robust design and ability to mix. First, the circulation and turbulence created by the static tube ensures that the entire water column is mixed adequately and sludge accumulation is limited. Second, the fact that there are no moving parts in the water and the orifices are less prone to clogging makes this a very robust solution.

Otherwise known as large bubble diffusers, coarse bubble diffusers get their name from the type of bubble they produce. Coarse bubble diffused systems are composed of dozens to hundreds of coarse bubble diffusers, each attached to a PVC or stainless steel air supply line fixed to the bottom of the lagoon. The most common coarse bubble aerator for lagoons is what is known as a static tube. When large bubbles are released at the bottom of the tube, they create an effect whereby water is pulled from below the static tube and pushed towards the surface.

TYPES OF EDI COARSE BUBBLE DIFFUSERS

HexAir^TM

Economical capital cost and ease of installation.
Ideal for single-drop mixing applications
Mounts on any pip material (VC, ABS, CPVC, & SS)
Clog Resistant
Rugged Heavy-duty construction
1-inch and 2 inch sizes available

MaxAir^TM

316 stainless steel construction
High-temperature resistance—will not fail in high-temperature settings
Clog resistant—designed for harsh environments
Highest airflow capacity for efficiency
Rugged heavy-duty construction for worry-free maintenance
Excellent for mixing and for demanding applications

PermaCap^T^M

Economical capital cost and ease of installation
5” diameter for greater air distribution
Mounts on any pipe material (PVC, ABS, CPVC, & SS)
Premium quality EPDM membrane with check valve
Rugged heavy-duty construction
Pre-assembled in our facilities

AirCone^TM

Non-clog design
Engineered orifice design for maximized air distribution
Turbulent mixing with contoured edge to fragment bubbles
Internal diaphragm check valve to prevent entry of solids
UV protection
Low capital and maintenance cost

Flexcap^TM

Economical capital cost and ease of installation
Mounts on any pipe material (PVC, ABS, CPVC, & SS)
No-clog design
Durable ABS body
Greatest air capacity
Integral check valve

Aeration Systems

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Office

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Model of Coarse Bubble Aeration System In a Tank

COARSE BUBBLE SYSTEM PARTS

Winter Startup Inspection of Maxair Duplex Diffuser Assembly

Comparison of Flat Panel to MiniPanel Diffuser

EDI recognizes that panel diffusers have high efficiency. With this in mind we have created Mini-Panel devices as alternatives to the flat panel diffuser types to have with the oxygen transfer efficiencies of flat panel configuration while producing actual energy savings because of significant reductions in operating pressure requirements.

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Analysis of Panel Diffuser Technologies

Technical Bulletin 174: Analysis of Panel Diffuser Technologies The emphasis on reducing total cost of ownership of biological wastewater treatment plants has driven the technology for aeration and mixing systems to seek ways of higher efficiency and superior performance. Panel diffuser systems have been developed as a result and offer some interesting capabilities in aeration mixing technology. Panels along wit...

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Optimization of Diffuser Systems

TECHNICAL BULLETIN 153 Optimization of Diffuser Systems Diffused Aeration System Performance Optimization Operation of aeration systems for biological treatment is well documented as requiring the bulk of energy in wastewater treatment plants (WWTP). Figure 1 shows the electricity requirements for the primary operation in an activated sludge facility. Aeration contributes 50-70%% of the energy requirements in th...

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Testing Pipe Support Spacing

Aeration system pipe supports are typically spaced in the industry to provide long-term performance and service of aeration piping systems. In the spacing of these pipe supports, there are several variables that must be considered and evaluated to create a proper design. Clearly, there is a desire to have the pipe supports function properly while using the minimum number in order to control economics for the sys...

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Sludge Removal and Diffuser Membrane Replacement Wastewater Treatment Lagoon at a Pumpkin Processing Plant

In 1999, Environmental Dynamics International (EDI) installed a partial mix, submerged aeration system with EDI’s FlexAir™ MagnumTM Fine Bubble Tube Diffusers at one of the two wastewater treatment lagoons for ‘Chiquita Processed Foods’ Pumpkin processing facility in Princeville, IL. In 2001, EDI installed another aeration system with MagnumTM non-buoyant diffusers in the second lagoon.

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AW System Upgrade at Bridgeport CT EDI Keeps Solving Unique Challenges

The City of Bridgeport, CT is another example of EDI’s ability to provide unique solutions to its clients. The city is part of ‘Long Island Sound’ protected water body cooperation effort that sets stringent discharge limits. The operating company running the plant for the city was struggling to meet those discharge limits; due to their 17-year-old ceramic disc diffuser aeration system that was failing ...

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Columbus, GA WRF: System Upgrade and Maintenance Program

The South Columbus Water Resources Facility, owned and run by Columbus Water Works (CWW), treats thewastewater coming from homes, businesses, and industries in the greater Columbus, GA area. The facilitytreats up to 70 MGD (264,979 m3/day) flow during wet seasons when storm-water enters the system. Inextreme conditions, the plant can handle up to 84 MGD (317,975 m3/day). In 2011, EDI provided its Flex...

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Duckett Creek WWTP: EDI Delivering on the ‘Aeration for Life’ Promise

In 1994, Environmental Dynamics International (EDI) upgraded the Aerobic Digestion system at the 5 MGD Duckett Creek WWTP near St. Charles, MO. EDI installed FlexAirTM MagnumTM 84P tube diffusers in two series tank systems. This system upgrade by EDI resulted in approximately $60,000 per year energy and operating cost saving. Also, improved DO condition helped the plant comply with desired SOUR (Specif...

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Retrievable Diffuser Aeration Systems

Below we evaluate retrievable diffuser systems by reviewing several common primary types of units. Simple drop-type assembly with a small diameter pipe and “T” section at the bottom. Diffusers are mounted at the “T” section and are installed near one wall of the aeration basin. This configuration creates a strong roll mix aeration pattern in the basin size fluid schematics shown in Figure 1.

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Coarse Bubble Diffusers

Coarse Bubble Diffusers 103 Coarse bubble diffusers are suitable for almost any type of water and wastewater application. The primary application of coarse bubble diffuser systems today are as indicated below: Aerobic Digestion Applications Coarse bubble diffusers have been the traditional diffusers used in these applications. The standard design rate for this application is 30 scfm per 1000 ft of tank volume....

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