Mazzei Injector Company

Leader in fluid mixing and contacting technologies—providing solutions for ozone, aeration and chemical treatment.

For more than 40 years, Mazzei has developed products providing solutions to water and wastewater problems in the municipal, industrial and agriculture markets, solutions to disinfection and sanitation problems for all markets including pools/spas and aquatics, and a solution for wine pump-over aeration.

Mazzei has been developing ozone transfer systems for the industrial and municipal water industries for more than two decades. From rural water purveyors treating a few gallons per minute to large municipal plants treating millions of gallons per day. Today Mazzei maintains its focus on research and development and is utilizing in-house computational fluid dynamics software to improve its mixing and contacting technologies.

Click here for an overview of Mazzei ozone transfer systems.

Mazzei’s wine pump-over aeration improves the fermentation process

Mazzei injectors are patented, highly efficient, mixing devices that support the many benefits gained from pump-over aeration during the fermentation process. During the aeration process, the wine is pumped through a Mazzei injector which draws in and uniformly distributes oxygen into the juice. A metering valve and flowmeter can be used to monitor and control the oxygen dose.

To find out more about Mazzei injectors for wine aeration, download the fact sheet here.

Mazzei Injectors provide much more oxygenation than do competitors. Comparative performance data can be viewed here.

Using pump-over for macro-oxygenation also improves hydrogen sulfide (H2S) removal. That can reduce the amount of copper sulfate required in the winemaking process, lowering costs, minimizing chemical handling and safeguarding the quality of your wine. To find out more about the innovative Mazzei wine pump-over aeration injectors, view the Wine Pump-over case study here.

In addition to efficiently oxygenating wine during pump-over, Mazzei Venturi injectors may be used to add fining agents and other additives during racking or blending.

Mazzei injectors have no moving parts and often do not require a supplemental pump—minimizing cost and maintenance. Download the fact sheet Wine Industry Solutions: From Start To Finish here.

Arris has entered into a Representative Agreement with Mazzei Injector Company for the Australian region.

Arris has been successfully using Mazzei Injector Company products for 20 years. During the early research development stages of the Rhizopod® system we needed to aerate the wastewater. We used Mazzei Injectors because of the high rate of oxygen transfer, the energy efficiency, and the robustness & reliability of the product. Two decades later we’re still using Mazzei injectors in a wide range of our wastewater treatment systems. We have never had to replace a single Mazzei injector.

Wine Pump-over – Fresno State Testimonial

Early in 2020, Ben Kele & Tony Kodel from Arris travelled to the head office of Mazzei Injector Company in Bakersfield, California.

Looking over the full range of products, including innovative ideas like the wine pump over system, we were keen to develop the business relationship even further. We’re incredibly happy to represent the Mazzei Injector Company in Australia.

For more information, visit


Pipeline Flash Reactor™

For optimum ozone transfer in municipal plant flows ranging from 2 to more than 200 MGD, Mazzei offer the Pipeline Flash Reactor™ utilizing patented technology supported by extensive research at leading universities. Providing high ozone mass transfer in a small footprint design, find out more here.




Case Studies

Arris recently installed 100mm venturi’s and nozzles from Mazzei Injector Company, LLC on a project in Victoria, Australia. The aim was to aerate industrial wastewater being held and treated in a series of Concept Environmental Services 1.5 ML tanks. The Mazzei venturi injectors and nozzles were chosen because they are robust and reliable, provide the required volumes or air in a small bubble (large surface area) and can be installed in the tanks without impacting the liner warranty. Many thanks to Jim White and the crew from Mazzei Injector Company, LLC for their assistance with this project.

Sidney, Ohio, wastewater treatment plant

Sidney, Ohio, wastewater treatment plant

Preparing water for discharge into the Great Miami River

City of Sidney, Ohio wastewater treatment plant improvement project.

The Great Miami River is a tributary of the Ohio River, approximately 160 miles long, in southwestern Ohio and Indiana in the United States. The Great Miami originates at the man-made Indian Lake and flows south through the cities of Sidney, Piqua, Troy, Dayton, Middletown and Hamilton.

Read the full case study here.

Update and Upgrade of Ozone Dissolution System at Southwest Water Treatment Plant.

The Orlando Utilities Commission’s (OUC) 45.6 MGD Southwest Water Treatment Plant, in operation since 1997, was originally designed to oxidize hydrogen sulfide (H2S) with ozone produced by four 950 ppd air fed ozone generators. Ozone contacting was provided by three fine bubble diffusion (FBD) basins. By 2009, the unavailability of replacement parts for the aging generators and the FBD basin high maintenance motivated OUC to update and upgrade the plant’s ozone system.

Read the full case study here.

Mazzei Degas Separator Selected for Wichita Aquifer Storage and Recovery Project.

In the 1990s, the City of Wichita, Kansas developed a water supply plan that included creating a sustainable water supply through the year 2050. The key component of the plan is recharging the large aquifer that lies under the region with 100 MGD of water from the Little Arkansas River. This undertaking is known as the Aquifer Storage and Recovery project or ASR. Phase I was completed in 2006 with the diversion of up to 10 MGD of river water into the aquifer through bank filtration and recharge basins.

Read the full case study here. For more information about the Mazzei GDT™ Degas Separator, click here.

Ozone system at Buckingham Water Treatment Plant (WTP) located in Gatineau, Quebec.

The Buckingham ozone system was commissioned in the summer of 2015 and continues to operate successfully. A stable dissolved ozone
residual required for CT credits is easily maintained 5 meters downstream from the PFR as predicted by the CFD analysis. The pipeline contactor remains bubble free and only contains the low concentrations of dissolved ozone required for disinfection (O3 ≤ 0.5 mg/l) which can pass through the non-ozone resistant HEDP pipeline without deteriorating the pipeline structure.

Read the full case study here.

Largest Ozone Facility in North America Meets Regulatory Requirements and Remediates Taste & Odor Problems.

In October 2008, the North Texas Metropolitan Water District began working to add ozone to its four interconnected water treatment facilities which operate as the Wylie Water Treatment Plant (WTP). Sitting on 442 Acres, Wylie was designed to treat up to 770 MGD of raw water using coagulation, settling, multi-media filtration and chlorine disinfection. The decision to add ozone was prompted by the need to satisfy both the regulatory requirements and the desire to remediate taste and odor problems.

Read the full case study here.


Mazzei venturi injectors can be applied to sub-surface irrigation via the AirJection® technique. AirJection® adds value to subsurface drip irrigation schemes. By injecting air into the subsurface drip system it creates a more aerobic soil environment, promoting soil health & encouraging the growth of beneficial soil microbes. Adding air to the irrigation water improves yields and provides plants with additional tolerance to salinity. University studies have been conducted by the Central Queensland University, Memorial University of Newfoundland, California State University, and the University of the West Indies. The research has been taken outside of the laboratory and into the field with the results showing improved crop yields for low capital investments. The Mazzei injector can also be used for fertigation  and chemigation of the crops.

Mazzei’s patented high-efficiency, Venturi-type injectors with internal mixing vanes deliver enhanced suction capacity at low differential pressure with superior uniform mixing and outstanding longevity with little or no maintenance. A Mazzei injector can be part of a basic economical injection system or as the core part of a advanced proportional feed fertigation system.

Mazzei’s Injector Selector Tool (IST) helps the grower or irrigation dealer to quickly find the right injector for their application. This free online tool is available on their website

Further reading:

Award-winning paper highlights the power of sidestream injection. Ozone system in Orlando boosted by replacing fine bubble diffusers with venturis.

A presentation by Tom Steinke of Mazzei Injector Company at the fall conference of the Florida Section of American Water Works Association (AWWA) on November 30, 2021 offered a detailed look at the improved operational control, ozone dosing and residual results, maintenance and safety achieved when the Orlando Utilities Commission (OUC) replaced three of its fine bubble diffuser ozonation systems with sidestream injection systems. Steinke’s talk was based on “Evaluation of mixing, mass transfer, O&M, energy and material requirements for H2S Oxidation at the Orlando Utilities Commission WTPs,” which recently received Florida Section of AWWA’s Best Paper award. DOWNLOAD

Breathing room: Aerating soil and water. One of the most exciting approached to aerating the soil environment integrates injectors with sub surface drip lines to add approximately 15 percent air by volume into irrigation water. DOWNLOAD

Aerating drip irrigation water improves soil health. Soil health is a hot topic around the world, and new research is demonstrating the significant impact of irrigation on soil health–not just in keeping crops alive, but in creating a hospitable environment for the countless microbes that enable plants to thrive. DOWNLOAD

Venturi injectors boost DO in power plant process water. Dissolved oxygen (DO) must be removed from power plant process and cooling water to minimize corrosion of equipment, and then returned to water before final discharge into the environment. DOWNLOAD

Breathing new life into the industrial watershed. What happens when we look at water as a resource at each stage? What can we heat or cool, lubricate, clean, or irrigate before we commit the time, space, energy and equipment to treating it? DOWNLOAD

You Shouldn’t Splash That S**t Around. The novel coronavirus pandemic has brought a wide range of health issues into sharp focus, including the spread of pathogens through aerosols, tiny droplets of liquid that can hang in the air for minutes or even hours. DOWNLOAD

Lagoon Aroma. Maintaining aerobic conditions in wastewater lagoons at food & beverage processing facilities. DOWNLOAD

Iron Removal  Protects  Pumping  Equipment. Dissolved iron—which is common in many groundwater sources—presents both a challenge and an opportunity for experts in pumps and water systems. Dissolved iron can clog pumps, screens and pipes with incrustation and biofouling. DOWNLOAD

Aerating Drip Irrigation Water: Assessing Agronomics and Economics. One of the most coveted inputs in farming is…air. Countless acres of soil have been plowed over the centuries to introduce air into the root zone. DOWNLOAD

Mazzei Injector Company’s basin nozzle manifold gas injection system thoroughly agitates bulk water and mixes gas—whether it be ambient air, pure oxygen, or ozone—into water or wastewater.  Its compact design and no maximum depth limitation make it adaptable for any installation. Unlike blowers, Mazzei’s process is virtually silent and requires little to no maintenance.
Utilizing in-house computational fluid dynamics (CFD) modeling, Mazzei systems are designed to ensure the ideal placement and configuration of our nozzle manifolds.  Multiphase flow modeling allows Mazzei to analyze and optimize mixing and mass transfer performance.
Take a look at this animation to see how the Mazzei basin manifold system works or check out the Mazzei Channel on to learn more about all their technologies.

Disruptive technology makes ozone a better treatment option. Sidestream injection (SSI) systems are shaking up the water treatment industry, unseating industry-standard fine bubble diffusion (FBD) systems by delivering fast, high-efficiency ozone transfer with a small footprint. In fact, the high speed of ozone mixing and transfer is so fast in sidestream injection systems – just seconds rather than minutes – that bromate formation is minimized, allaying a long-time misconception about misconception about ozone injection. DOWNLOAD

Ozone industry sets its sights on industrial applications. Ozone has proven its efficacy, efficiency and value in drinking water treatment for years. Now ozone proponents are turning their sights on industrial applications, where the same benefits that have made ozonation so attractive in municipal water treatment can be applied across a much wider range of eater quality challenges. DOWNLOAD



To find out more about ozone treatment
as well as other Arris water treatment
technologies, click here.

Contact Arris to find out more about
our specialised water technology solutions.