How Oil-Free Air Compressors Support Bubble Curtain Systems

Introduction

Underwater construction presents unique challenges, particularly when it comes to protecting marine ecosystems from excessive noise and sediment disruption. One proven solution is the bubble curtain. This system releases air bubbles that rise and create a barrier in the water. The barrier helps reduce underwater noise, limit the spread of contaminants, and improve safety during offshore operations.

At the core of this system are air compressors, which supply the clean, pressurised air needed to generate the curtain. In this blog, we look at how oil-free air compressors support the use of air bubble curtains. We also explain how they help offshore teams meet environmental regulations and keep operations running efficiently.

Understanding the Bubble Curtain

A bubble curtain is created by laying pipes on the seabed around the site. They connect a perforated hose to compressors, which supply clean, oil-free air to the system. Compressed air is released through the perforated hose. As the air escapes, it forms a vertical wall of bubbles that alters the density of the surrounding water.

This barrier helps absorb and disperse sound waves generated by activities such as pile driving, dredging, and subsea construction. Bubble size and density can be changed by adjusting the pressure and airflow rate.

These systems are especially useful in sensitive marine areas. They help reduce noise pollution that can disturb or harm animals like dolphins, porpoises, and fish. Project teams often deploy big bubble curtains with multiple acoustic layers to control sediment more effectively. These single, double or triple bubble curtains can be used for enhanced noise mitigation.

The Role of Oil-Free Air Compressors

To function effectively, bubble curtain systems require a continuous supply of clean, high-pressure air. This is where air compressors come in. Specifically, oil-free compressors are essential, as they eliminate the risk of oil contamination in marine environments.

Engineers design the right package of oil-free air compressors to deliver necessary airflow while keeping pollutants out of the water. This is critical during operations such as underwater welding, subsea pipeline installation, and oil spill containment, where environmental compliance is non-negotiable. Aggreko offers a range of offshore compressors, including both electric, HVO and diesel-powered models. This gives teams flexible options for short-term or long-term use.

The electric units use variable speed drive (VSD) technology to improve energy efficiency and produce zero emissions. Aggreko’s diesel models meet Stage V certification, which ensures they follow the latest environmental standards and keep harmful emissions to a minimum.

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Meeting Environmental Regulations

Across Europe and other offshore regions, environmental regulations are becoming increasingly strict. In areas like the North Sea, operators must manage construction activities with care. The region includes more than 40 wind farms and close to 200 oil and natural gas platforms. It is also home to many protected marine species.

Regulations such as 2001’s Offshore Petroleum Activities Regulations require that any project likely to impact conservation areas undergo a detailed environmental assessment. Similar rules apply in the Baltic and Mediterranean Seas.

To comply, operators must use equipment that meets the highest standards of air purity. Aggreko’s offshore air compressors meet ISO 8573-1 Class 0 certification. This means they provide the highest air purity needed for sensitive applications such as air bubble curtain systems.

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Applications Across the Offshore Sector

For the oil and gas industry, bubble curtain use extends well beyond wind turbine installation. Teams use bubble curtains during dredging to prevent sediment from drifting into surrounding waters. This helps safeguard coral reefs and other delicate marine habitats.

In subsea pipeline projects, they are used to manage water flow and minimise disruption. They also use bubble curtains to contain offshore oil spills. Pulling the oil into one area makes cleanup easier.

In colder climates, teams deploy bubble curtains to prevent ice from forming around underwater structures. In aquaculture, bubble curtains can keep jellyfish out of fish pens. They also raise oxygen levels in the water, which improves water quality and safeguards marine life.

Their many uses show why reliable compressors are so important. Industry experts also highlight the value of solutions by adapting them to suit different project needs.

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Expertise and Remote Monitoring

Specifying the right air compressors for bubble curtain systems requires technical knowledge and experience. With many offshore teams facing staffing shortages, expert support can help bridge skills gaps. Aggreko’s engineering team offer strong industry expertise. They can recommend the best oil-free compressors based on the size of the project, the air needed, and the site conditions.

To further enhance reliability, Aggreko provides 24/7 remote monitoring through its ARM (Aggreko Remote Monitoring) service. This system delivers real-time performance data and early alerts, helping operators maintain control and avoid unplanned downtime.

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Cleaner, Quieter, and More Compliant Operations

As offshore construction continues to expand, so does the need for sustainable and compliant solutions. Air compressors, particularly oil-free air compressors, are essential to the success of bubble curtain systems. These systems help lower noise pollution and protect marine life. They also support safe and efficient work in both the oil and gas industry and the renewable energy sector.

When project leaders work with experienced providers like Aggreko, they can meet environmental standards more easily. They can also keep projects on time and on budget. Clean air plays a key role in building a better offshore future. Whether the project involves a wind farm, a subsea pipeline, or anything else, the right equipment makes a difference.

Discover more about Aggreko’s range of oil-free air compressors.

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