Oxygen Generators
for On-Site Oxygen Production
Reliable oxygen generation use in solutions for biogas, wastewater, aquaculture and industrial process applications.
Over 45 Years in Operation
1000's of UK Installations
Supporting 100's of UK Sites
Oxygen generators are used to produce oxygen on-site from air for industrial and process applications.
By generating oxygen directly from air, oxygen generation systems remove the need for cylinders or liquid oxygen supply, providing a reliable and cost-effective alternative for continuous operation.
In biogas applications, oxygen generation is commonly used for controlled air dosing and microbial desulphurisation, helping reduce hydrogen sulphide levels and improve gas quality without significantly diluting the biogas.
Allison Engineering supplies both PSA (Pressure Swing Adsorption) and VSA (Vacuum Swing Adsorption) oxygen generation systems, allowing solutions to be tailored from smaller process applications through to larger-scale installations where efficiency and flow demand are key considerations.
Oxygen Generator Systems
From compact PSA systems to larger-scale VSA installations, Allison Engineering can help specify the right oxygen generation solution based on your flow requirements, process conditions and application needs. Find a few examples of our range below.
PSA Oxygen Generator
An on-site oxygen generation system designed to provide a reliable and cost-effective oxygen supply for industrial and biogas applications.
Produces oxygen up to ~93% purity with scalable system design and integration for controlled process dosing.
VSA Oxygen Generator
A high-capacity oxygen generation system designed for larger applications requiring efficient and continuous oxygen supply.
Optimised for higher flow rates with lower energy consumption and integration into process-controlled systems.
Why Choose Oxygen Generators
On-site oxygen production
Generate oxygen directly from air, reducing manpower and removing reliance on external supply, deliveries and storage.
Reduces operating costs
Long-term cost efficiency compared to delivered oxygen, with reduced logistics and handling requirements.
Supports process optimisation
Enables controlled oxygen dosing to improve performance in applications such as biogas desulphurisation and treatment processes.
Flexible system options
Available as PSA for smaller to medium demand and VSA for larger-scale applications with higher flow requirements.
Continuous and reliable supply
Provides a stable oxygen source for ongoing process operation without supply interruptions over years of operation.
Integrated control capability
Can be linked to process variables such as gas flow or H₂S levels for automated oxygen injection and control.
Suitable for Multiple Industry Sectors
Renewable Energy & Biogas
Used for oxygen dosing and microbial desulphurisation in anaerobic digestion systems to reduce H₂S and improve gas-to-grid performance.
Aquaculture & Fish Farming
Maintains dissolved oxygen levels in water systems, supporting fish health and improving production conditions.
Industrial & Process Applications
Suitable for a wide range of industrial processes where on-site oxygen generation improves control and reduces reliance on delivered gas.
Wastewater & Water Treatment
Supports aeration and oxygen dosing processes where controlled oxygen supply improves treatment efficiency.
Energy from Waste
Used to support combustion and process optimisation where controlled oxygen supply improves efficiency and stability.
Need information or advice?
Speak with our friendly, expert team to discuss your requirements and find out how we can help you.
Full Service UK Solutions
Allison Engineering supports oxygen generation projects from initial consultation through to supply, commissioning and ongoing support, ensuring systems are correctly specified and perform reliably in operation.
Specifications & Planning
Application review, oxygen demand assessment, system selection and process integration planning based on site and use-case requirements.
Supply & Commissioning
Product and system supply, technical installation guidance, commissioning and full setup to ensure correct operation in the field.
Support & Optimisation
Ongoing UK based servicing, maintenance and technical support to ensure long-term reliability, performance and efficiency over lifespan.
Oxygen Generator FAQs
Explore common questions about oxygen generators, including how PSA and VSA systems work, where they are used and how to choose the right solution for your application.
What is an oxygen generator?
An oxygen generator is a system that produces oxygen from air on-site, typically using PSA (pressure swing adsorption) or VSA (vacuum swing adsorption) technology.
These systems provide a continuous oxygen supply without the need for cylinders or liquid oxygen delivery.
What is the difference between PSA and VSA oxygen generators?
PSA systems operate at higher pressure and are typically suited to smaller or medium-scale applications. VSA systems operate at lower pressure using vacuum regeneration and are generally more efficient for larger flow requirements.
The choice depends on oxygen demand, energy efficiency requirements and application scale.
What are oxygen generators used for?
Oxygen generators are used in a wide range of applications, including:
- biogas desulphurisation in anaerobic digestion
- wastewater aeration and treatment
- aquaculture and fish farming
- combustion and industrial processes
- energy from waste applications
They are used wherever a reliable and controllable oxygen supply is needed.
Why use an oxygen generator instead of cylinders?
On-site oxygen generation removes the need for delivery logistics, cylinder handling and supply management. It also provides a more stable and cost-effective long-term solution with greater control over oxygen supply.
Are oxygen generators suitable for biogas applications?
Yes, oxygen generators are widely used in anaerobic digestion systems for controlled oxygen dosing to reduce hydrogen sulphide levels and improve gas quality.
They are commonly used in gas-to-grid and CHP applications where consistent gas quality is important.
How do I choose the right oxygen generator?
Choosing the right system depends on:
- required oxygen flow rate
- process conditions
- application type
- energy efficiency requirements
- site layout and integration
PSA systems are typically used for smaller to medium demand, while VSA systems are better suited to larger installations.
Why choose Allison Engineering for oxygen generation?
Allison Engineering provides application-led solutions with full support from specification through to commissioning and ongoing service.
With experience across biogas, wastewater and industrial applications, we help ensure the system is suited to the process and performs reliably over time.
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Why Trust Allison Engineering
We are committed to delivering the highest standards across the specialist areas we support, combining proven products with practical engineering knowledge and dependable service.
Need Help Choosing the Right Biogas Analyser?
Allison Engineering can help you identify the right oxygen generation system for your application, process requirements and site conditions.