AirSep Corporation Installs System Upgrades at One of the Largest Wastewater Utility Treatment Plants in the Southeast - CAIRE Inc.

Commercial solution will assist Miami-Dade County to continue to meet regulatory requirements

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Buffalo, NY (May 11, 2021) – AirSep Corporation, a division of CAIRE Inc., is pleased to announce that two AirSep ASV97000 VPSA Oxygen Systems have been selected as part of a major project underway upgrading one of the largest sewage treatment plants in the southeastern US.

The Miami-Dade Water and Sewer Department (WASD), which serves more than 2.3 million residents and 20 million visitors annually, is currently mid-way through its multi-billion dollar Capital Improvement Program, upgrading its sewage treatment plants, pump stations and pipes. One such upgrade includes the renovation to its current cryogenic oxygen system for wastewater treatment. PCL Construction, a global engineering company based in Denver, CO, was selected to modernize the existing system and create the new infrastructure at the South District wastewater treatment plant.

The project includes replacing the existing cryogenic oxygen system with two oxygen plants – AirSep ASV97000 VPSA Oxygen Systems (each producing 97,000 SCFH of oxygen). These are the largest systems AirSep has built in company history.

The AirSep VPSA Oxygen Systems will enable Miami-Dade County to meet new guidelines and regulations set by the US Environmental Protection Agency and the Florida Department of Environmental Protection. With AirSep VPSA technology, oxygen can be produced more cost effectively with an on-stream efficiency of 99%.

“AirSep is honored to have the opportunity to contribute to the plant’s many improvements that will allow WASD –  on behalf of Miami-Dade County to meet new regulatory requirements, as well as  increase the plant’s treatment capacity,” said Lawrence Hughes, AirSep Vice President and General Manager.

The aerobic wastewater treatment method uses oxygen to remove contaminants and pollutants like nitrogen and phosphorus from the wastewater (biological nutrient removal (BNR)). When oxygen is injected into wastewater, it stabilizes the sewage sludge and cleans the wastewater, making it odor-free and well-suited for direct discharge or water reuse.

AirSep can customize plant construction to meet a customer’s specifications. In the case of the Miami Dade installation, the AirSep VPSA Plant offers idle time and turndown at 40 percent of rated capacity without venting product (versus 70-80 percent with the older system). AirSep VPSA systems are fully automatic with unattended operation. Key process parameters are locally and remotely monitored every 250 milliseconds. The HMI touchscreen on the VPSA control panel provides state-of-the-art control and monitoring of the system’s operation including a fail-safe shutdown.

Molecular sieve adsorbs nitrogen from ambient air to provide the purified oxygen generated by the system.  The design of the process switching valves, the adsorber vessels and sieve fluidization protection controls, provides for extremely long molecular sieve life of all VPSA systems. AirSep plants with proper maintenance have been operating at rated performance with the original molecular sieve for over 20 years.

AirSep offers custom-engineered VPSA oxygen systems, with capacities ranging from 2,000 SCFH (52 Nm³/hr) to 120,000 SCFH (3,155 Nm³/hr) and has installations around the world for a variety of applications.

To learn more about how AirSep’s Oxygen Systems extensive product offering can solve your oxygen supply challenges, please visit or contact us. We will be happy to discuss your oxygen needs.

Ref: MR-CORP0011 A