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Water and Wastewater Blower Solutions

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Aftermarket

Aeration blowers/exhausters by Hoffman & Lamson are the proven standard for water & wastewater treatment applications. 

From multistage centrifugal to regenerative and high-speed turbo blowers, we offer the latest aeration blower technologies that maximize productivity and minimize energy costs for your operation. 

Review our product portfolio and discover the technology that is best suited for your processing needs. 

Aeration Blowers for Wastewater Treatment

Lobe and Screw PD Blowers

Positive Displacement

Our innovative positive displacement blower packages (PD blowers) are state-of-the-art and best suited to maximize productivity and minimize energy costs for environmental applications such as municipal wastewater treatment.
Rotary Lobe Positive Displacement BlowersScrew Positive Displacement Blowers

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50 Hz Hoffman & Lamson Multistage Centrifugal Blower

Multistage Centrifugal Blowers

The ideal solution for processes requiring uniform pressure, pulse-free flow and oil-free operation.
Low Flow Inlet Medium Flow Inlet High Flow Inlet

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High-Speed Turbo Blower

High Speed Turbo

HOFFMAN's REVOLUTION PLUS High Speed Turbo Blower Series
10-75 HP 100-200 HP 250-350 HP 400-700 HP 

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Regenerative Blower

Regenerative

The ideal solution for smaller applications as these models demonstrate limited flow and varying pressure. Designed to provide continuous pulse-free air.
TurboPakTurboTron

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BioGas System

Engineered Systems

Industrial Vacuum System Engineered-to-order Systems

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Rigel Controls

Controls & Energy Management

Manage your centrifugal systems with our variety of controls & energy management ranging form analog monitors to the latest digital controllers.
Analog MonitorsMDOCS Control SystemDigital Control PanelsMultiGard Controllers

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Water & Wastewater Treatment Applications

HOFFMAN & LAMSON blowers for wastewater treatment facilities are top-tier solutions and deliver quality, reliability, value, and performance. Click on the water & wastewater treatment applications below to learn more about how our aeration blower technology can work for your processes.

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Aerated Grit Chambers

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Aeration in Wastewater Treatment

Aeration In Wastewater Treatment

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Filter Backwash

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Gas Boosting In Anaerobic Digestion

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Membrane Bioreactors

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Sequencing Batch Reactors

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Sewage Sludge Incineration

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Water & Wastewater Treatment Plant Process Overview 

Wastewater treatment methods vary greatly for many reasons. The volume and composition of the sludge in the influent, as well as how the sludge residue will be disposed of, all dictate design aspects of the plant. 

A large volume of wastewater will preclude a simple batch system that might be appropriate for a smaller scale treatment facility. Sludge with low potassium or phosphorus content or loaded with heavy metals would not be suitable for land application. 

Wastewater treatment plants allow solids to settle out and the remaining organic matter is broken down by microorganisms. Each area of the plant has a specific function.

water-and-wastewater-treatment_water-and-wastewater-treatment-process-overview


Water & Wastewater Treatment Plant Process

  • Raw wastewater is run through a bar screen. The deflected large solids may be hauled away or reground and reintroduced to the treatment process. 
  • After passing through the bar screen, the influent enters the grit chamber. This is a large basin that allows the water to slow down and the grit to settle out. Grit includes sand, coffee grounds, and eggshells. This material cannot be broken down and must be hauled away. 
  • The remaining water reaches a grinding pump, called a comminutor. Large pieces in the water are shredded, making it easier for the microorganisms to consume them. 
  • Water enters the aeration chamber where oxygen enriches the water, and microorganisms are added. The organic matter begins to break down.
    The microorganisms multiply rapidly and consume the biochemical oxygen demand (B.O.D.) very quickly. B.O.D. is simply the food matter in the water. This organic matter will be consumed in a couple of hours. The air that bubbles up not only feeds oxygen into the process but keeps the microorganisms suspended so they do not settle out. 
  • Following the aeration chamber, water enters the clarifier or sedimentation tank. Once the organic matter is consumed, the microorganisms have food, grit, and particulates stuck to their outer enzyme coating.
    The added weight makes them sink, or “floc out” to the bottom of the clarifier. Some of this sludge is removed and some of it returns to the aeration chamber to help seed the next batch. 
  • Following the aeration process, the water enters another tank with a sand filter bottom. HOFFMAN & LAMSON blowers are used to backwash the sand to keep it filtering properly. 
  • The sludge that will return to the aeration tank is held for ten days in a holding basin. Each day, a new layer of sludge is added. The oldest layer moves daily to seed the activation chamber.
    During the ten-day period, the sludge is activated (stressed) so that it becomes extremely hungry and ready to multiply. About one-fifth of the sludge that is removed from the process can be used as a soil conditioner after dewatering or in liquid form. Another method of sludge removal is landfilling. 
  • When landfill space is not available, wastewater treatment plants turn to incineration. HOFFMAN & LAMSON blowers are used in fluidized bed incinerators and in other incinerators to aid in combustion. 
  • After the clarifier, the water is called “supernate”. Chlorine is added and the water sits in the disinfection chamber while the disease-causing microorganisms are killed. 
  • The water is now safe to be released into a natural body of water. 

Anchored In Tradition 

Hoffman & Lamson is recognized around the world as a leading global provider of blower/exhauster solutions for water & wastewater treatment applications. 

For over a century, our customers have trusted the quality performance our blowers provide. That is why our blower portfolio remains the most comprehensive offering. 

Our priority continues to be unparalleled responsiveness to meeting our customer’s needs. Our unwavering commitment to engineering innovative product designs, and quality manufacturing is evident with over 100,000 installations worldwide.

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ABOUT Hoffman™ and Lamson™

Hoffman™ and Lamson™ brands of centrifugal blowers and exhausters are among the many compressed air and gas technologies manufactured by Gardner Denver Inc.

Part of the Nash Division, they are American originals. Hoffman™ and Lamson™ brands have been setting industry standards for excellence, reliability, and customer satisfaction for over 100 years. Lamson, established in 1880, and Hoffman, in 1905, are brands customers know and continue to trust.

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