PSA Oxygen Generator for Wastewater Aeration | 93% ±3% O₂ | Qingdao Green Power
A ZMS twin-tower PSA oxygen system for oxygen-enhanced aeration of the biological stage: 93% ±3% O₂ at 1–200 Nm³/h and 0.4–0.5 MPa outlet.
A PSA oxygen generator produces oxygen on site with zeolite molecular sieve (ZMS) in a twin-tower pressure swing adsorption system: nitrogen is adsorbed while oxygen passes through at 93% ±3% purity, and the two towers alternate for a continuous supply.
In wastewater treatment the generator is applied to oxygen-enhanced aeration of the biological stage, where raising the oxygen available to the biomass supports the treatment process.
The published output range is 1–200 Nm³/h at an outlet pressure of 0.4–0.5 MPa, with energy consumption confirmed against the selected model datasheet of oxygen produced and a start-up time of 30 minutes or less to rated purity.
Because the oxygen is generated at the plant, the system avoids delivered-gas logistics and can be sized to the aeration duty rather than to a standard delivery size.
| Parameter | Specification |
| Purity | 93% ±3% O₂ |
| Flow | 1–200 Nm³/h |
| Outlet pressure | 0.4–0.5 MPa (adjustable) |
| Product-gas dew point | -40°C or lower |
| Energy use | model-specific energy consumption |
| Adsorbent | Zeolite molecular sieve (ZMS) |
| Technology | ZMS twin-tower PSA (zeolite molecular sieve), continuous on-site supply |
| Feed air | model-specific pressure, dew point ≤-40°C, oil-free |
| Startup time | ≤30 minutes to rated purity |
| Control | PLC automatic; optional HMI touch screen |
| Typical duty | Biological treatment aeration, municipal and industrial wastewater plants, and load or peak support |
The PSA oxygen range is published as a purity and capacity configuration rather than a numbered model table: fix the required oxygen flow first, then confirm purity, outlet pressure and energy use for the duty.
- Adsorption towers: two adsorber vessels alternate between adsorption and regeneration, so the oxygen supply is continuous.
- Molecular sieve: zeolite molecular sieve (ZMS) selectively adsorbs nitrogen from the compressed air so oxygen passes through as product gas at 93% ±3% purity.
- Air dryer: the package includes an air dryer that brings the compressed-air moisture load down so the feed-air dew point requirement is met before the air reaches the sieve bed.
- Filtration: filtration stages remove oil aerosol and dust carried over from the compressor and receiver, protecting the sieve bed.
- Air receiver: a buffer tank (air receiver) between the compressor and the PSA towers steadies the feed-air supply.
- Control cabinet: PLC automatic control with an optional HMI touch screen; the control cabinet manages the valve cycle and the operating parameters.
- Purity monitoring: an oxygen analyser monitors the purity of the product oxygen, and its calibration is checked on schedule.
- Feed air: compressed air at model-specific pressure with a dew point of -40°C or lower, oil-free.
- Biological treatment aeration: provides oxygen for oxygen-enhanced aeration of the biological stage.
- Municipal plants: supports aeration duty where on-site oxygen generation is preferred to delivered gas.
- Industrial wastewater: feeds oxygen into aeration duties at industrial wastewater treatment plants.
- Load and peak support: adds oxygen capacity alongside existing aeration equipment during peak load.
- Compact installation: generates oxygen at the plant using the same feed-air conditioning package as our other PSA systems.
- Retrofit and expansion: raises treatment capacity where the existing blower system is at its limit.
- Confirm the required purity and flow, since these set the ZMS charge and the system size.
- Check the outlet pressure against the 0.4 to 0.5 MPa range.
- Note the energy consumption confirmed for the selected model when sizing the power supply and operating cost.
- Confirm the feed-air pressure and treatment requirements should be confirmed against the selected model datasheet, conditioned by an air dryer and filtration stages.
- State the aeration duty and operating schedule so the generator is sized to average demand.
- Where the aeration has to run continuously, plan the maintenance window around the start-up time of 30 minutes or less.
What oxygen purity is used for wastewater aeration?
A standard ZMS twin-tower PSA unit produces oxygen at 93% ±3% purity, which is the range used for oxygen-enhanced aeration.
What flow and pressure does the system deliver?
The published output is 1–200 Nm³/h of oxygen at an outlet pressure of 0.4–0.5 MPa, adjustable.
What information is needed to size the generator?
Provide oxygen flow, target purity, outlet pressure, application, operating hours and the available compressed-air conditions.
Why use oxygen instead of air for aeration?
Oxygen-enhanced aeration raises the oxygen available to the biomass, which supports the biological stage where the existing blower system is at its limit.
What is the energy consumption?
Approximately model-specific energy consumption of oxygen produced, and start-up to rated purity takes 30 minutes or less.
Related Products
- PSA Oxygen Generator
- Industrial O₂ Applications
- O₂ for Aquaculture
- PSA Package Equipment
How to Choose a PSA Oxygen System for Wastewater Aeration
Quick answer: Oxygen-enhanced aeration uses oxygen generated on site instead of delivered gas. Start from the oxygen flow the biological stage needs, then match the 93% ±3% O₂, 1–200 Nm³/h output and 0.4–0.5 MPa outlet.
How much oxygen does the aeration duty need?
Start from the oxygen flow the biological stage requires and the aeration schedule, then match it to the 1–200 Nm³/h published range. The wastewater selection guide covers the wider plant picture.
Is on-site generation better than delivered gas?
Generating at the plant removes delivery logistics and lets the supply be sized to the aeration duty rather than to a standard delivery size, with energy use published at model-specific energy consumption.
What does the system need from the plant?
Compressed air at model-specific pressure, dew point -40°C or lower and oil-free, plus power and installation space for the skid, air dryer, filtration and air receiver.
Selection Data to Send Our Engineers
- Required O₂ flow (Nm³/h)
- Target oxygen purity
- Outlet pressure (MPa)
- Aeration duty and operating schedule
- Available compressed-air supply and quality
- Site conditions and power supply
Industry Applications
Explore how this equipment can be applied in related industrial sectors and review application-specific selection guidance.
Technical selection & RFQ
Request a Quote for PSA Oxygen Generator for Wastewater Aeration | 93% ±3% O₂ | Qingdao Green Power
Looking for a PSA oxygen generator supplier for an industrial project? Share the operating conditions below so our team can review the duty, recommend a suitable configuration and prepare a quotation. Final model selection and performance should be confirmed against your actual process conditions and the applicable product data.
Information to include in your inquiry
- Required oxygen purity: Target O₂ concentration and process-specific requirements
- Oxygen flow: Average and peak demand, with units such as Nm³/h
- Outlet pressure: Required delivery pressure and pipeline conditions
- Application & operating profile: Wastewater aeration, aquaculture, combustion, metallurgy, or other use
- Site utilities: Power supply, feed-air conditions, installation environment and available space
Not all details are available yet? Send the information you have, your datasheet or a process description. We can identify the missing selection data before confirming a model.