GREENOV, a mission-driven company housed in the Incubator Central Nantes, has initiated the first sea trial of the SubSea Quieter®, a disruptive noise reduction system based on an innovative membrane designed to mitigate the impact of maritime activities on underwater ecosystems. With six years dedicated to its development, the SubSea Quieter® offers a unique solution for coastal and offshore companies to minimize their environmental footprint.
The initial prototype, tailored for 2.5-meter diameter piles, will undergo extensive real-world testing for two months starting in early 2024. These trials aim to validate the acoustic performance and user-friendliness of the future full-scale system.
Underwater noise reduction is a critical priority for safeguarding our oceans. The rapid propagation of sound underwater—four times faster than in the air—makes it imperative to mitigate the disruptive effects of human activities on marine life, which relies heavily on sound for navigation, communication, and feeding.
Pile driving operations used for wind turbines installation generate intense underwater noise, reaching up to 260dB, causing significant disturbances to aquatic fauna. They disrupt the communication of marine animals – through masking – and behavioral changes can be observed. Loud noise can cause temporary or permanent hearing loss. Some particularly intense noises can even lead to the death of animals, for example by causing physical impacts on hearing organs or the bladders of fish to explode. As people build more ports to combat global warming, and as offshore wind farms multiply to decarbonize our energy supply, the sources of underwater noise in our oceans are exploding! Global regulations, particularly in Europe and France, are therefore increasingly stringent in reducing these impacts.
The SubSea Quieter® system is a noise abatement technology which aims to impede the transmission of underwater noise from works operations in the marine environment. It can also contain turbidity generated by coastal works. The SubSea Quieter® system is based on a multi-layer membrane into which a fine particle of air is injected to create a barrier to the sound waves.
Particularly innovative and relatively simple to use, the system reduces noise by 10 to 35 decibels depending on the sound frequencies, i.e., a 94 to 99% reduction in the acoustic power of marine operations, a performance well above that of existing systems such as bubble curtains.
Greenov has developed two types of the SubSea Quieter®:
The SubSea Quieter® has won several recognitions in France such as Prix Décibels d’or 2024, selected as one of the 30 start-ups in the first French Blue Tech Index 2023, Prix Port du Futur 2022, Prix Du Ministère de la Transition Ecologique, Prix Solar Impulse, etc.; as well as the AMBA Global Start-up of the Year 2022 award and the prestigious European EIC Accelerator program.
This is the first time the company will be testing the SubSea Quieter® pile driving system. Testing began in December 2023 with the assembly of the system and an initial validation of the subsystems in air. They will be followed by a series of tests over a 4-week period between February and March 2024 under sea conditions in the Port of Saint-Nazaire (France).
The trials are being carried out in collaboration with Bouygues Travaux Publics Régions France and Quiet-Oceans, two companies providing their expertise in marine civil construction and underwater acoustics.
Entirely designed and manufactured by a network of partners in the Pays de la Loire region, France and Europe, the system is 10m high, 5m in diameter and weighs 25 tones. It is equipped with membrane panels held in place by two metal structures: a high structure equipped with powerful winches that allow the system to slide around the pile to be beaten, and a low structure that functions as a basket into which the membrane is folded before being deployed until the seabed. These trials will also enable the company to invite its network of partners: local authorities, public organizations, manufacturers, suppliers, NGOs and future customers.
With these tests, Greenov aims to confirm the viability of its system and accelerate its commercialization. Following these trials, Greenov aims to see its SubSea Quieter® become the new standard solution in the underwater noise reduction market, estimated at €350M/year worldwide, and will launch a dedicated subsidiary called SEALENCE in mid-2024, with a strong ambition: to become the world leader in the sector within 5 years!
Greenov will soon be raising €10M to complete its R&D work and expand internationally, with its sights set on the European, North American and Asian markets, and several exciting projects already signed. Directly and with local partners, Greenov aims to create more than 200 jobs.
Let’s forge ahead with determination, passion, and a shared commitment to safeguard the oceans — one innovation at a time.
Whales, the majestic giants of the ocean, play a crucial role in maintaining the delicate balance of marine ecosystems. As we commemorate World Whale Day this February 18, it is imperative to reflect on the importance of preserving these magnificent creatures and the urgent need to address the myriad threats they face in today’s world.
Ocean pollution, ship strikes, tourism pressure, fisheries interactions, climate change, and vessel traffic stand as formidable threats to whale populations worldwide. While each of these factors poses significant challenges individually, it is their cumulative impact that poses the greatest risk to the health and well-being of whales. There is not one single greatest threat; rather, it is the combined effect of these factors that puts whales at risk. Understanding and mitigating these threats is crucial for safeguarding whale populations and preserving the balance of marine ecosystems.
One of the most pressing threats to whale populations is collisions with vessels, known as ship strikes. The increase in maritime traffic worldwide has heightened the risk of accidental collisions, leading to injuries and fatalities among whales. To address this threat, initiatives such as speed restrictions in whale habitats and the development of whale detection technologies are being implemented to reduce the likelihood of collisions.
Underwater noise pollution poses a significant threat to whales, disrupting their communication, navigation, and feeding behaviors. Anthropogenic sources such as shipping, seismic surveys, and underwater construction generate high levels of noise that can have detrimental effects on whale populations. Strategies to mitigate noise pollution include regulating vessel traffic in sensitive areas and implementing quieter technologies for maritime activities.
Whales are vulnerable to entanglement in fishing gear, such as nets and lines, which can lead to injuries, exhaustion, and death. As whales struggle to free themselves, they become further entangled, exacerbating the situation. Efforts to address this threat include the development of whale-safe fishing gear and the implementation of regulations to minimize the risk of entanglement.
Pollution from plastics, chemicals, oil spills, and other contaminants poses a significant threat to whale populations and marine ecosystems. Whales may ingest or become entangled in marine debris, leading to health issues and mortality. Addressing ocean pollution requires collective action to reduce plastic consumption, improve waste management practices, and mitigate the discharge of pollutants into marine environments.
Climate change is altering ocean conditions and ecosystems, impacting the distribution and abundance of prey species for whales. Rising sea temperatures, ocean acidification, and changes in currents and food availability pose challenges for whale populations already facing other threats. Mitigating climate change and its impacts on marine ecosystems is essential for the long-term survival of whales and other marine species.
Together, we can make a difference in protecting whales and ensuring their survival for future generations. Here are some ways you can help:
By taking action today, you can be a part of the solution and help protect whales and their ocean home. Together, we can make a positive impact and ensure a brighter future for whales and marine ecosystems. Join us in our mission to safeguard these magnificent creatures for generations to come.
As part of our commitment to marine conservation, Greenov is proud to be involved in initiatives aimed at protecting whales and mitigating the threats they face.
At Greenov, we have developed the SubSea Quieter (SSQ), an innovative clean technology designed to reduce the harmful underwater noise generated by human maritime activities. The SSQ addresses noise pollution caused by coastal and pile driving works and the installation of offshore wind turbines in the marine environment. Our underwater noise mitigation system is engineered with advanced technology, featuring a membrane in 3D. This membrane is incorporated into inflatable panels, which, when deployed, create a barrier between the water and the introduced air.
Learn more about it: The SubSea Quieter
An innovative application developed and managed in collaboration with Conserve.IO and the International Fund for Animal Welfare (IFAW). Whale Alert serves as a tool for preventing collisions between ships and large cetaceans by providing real-time sightings and alerts. This citizen science app relies on collaborative efforts from marine scientists, boaters, commercial and ferry crews, and NGOs to report whale sightings and track their movements.
Greenov is actively involved in the deployment and promotion of Whale Alert in Europe and overseas territories, advocating for its use among maritime stakeholders and promoting awareness of its benefits. By providing a platform for real-time whale sightings and facilitating proactive measures to prevent collisions, Whale Alert represents a significant step forward in our efforts to protect whale populations and ensure their continued survival.
Learn more about it: Whale Alert
As we mark World Whale Day, let us reaffirm our commitment to protecting and taking decisive action to mitigate the threats they face. By working together and embracing innovative solutions, we can ensure a brighter future for whales and the marine ecosystems they inhabit.
Let’s forge ahead with determination, passion, and a shared commitment to safeguard the oceans — one innovation at a time.
Member
Damien Demoor, a graduate from Audencia Business School, has been awarded the prestigious MBA Startup of the Year for his inspiring venture, Greenov.
The AMBA & BGA Excellence Awards 2022/23, held on December 9, 2022, at the Biltmore Hotel in London, gathered leading figures from the global business education community to celebrate excellence and commend exceptional achievements in business schools, MBA students, graduates, suppliers, and employers.
As the event unfolded, Damien’s win for MBA Startup of the Year stood out, highlighting the value of startup business strategy and innovation in the competitive business landscape.
Greenov, founded in January 2021, is on a noble mission—to protect marine ecosystems through maritime clean technology that minimize anthropic impacts. Embracing maritime Clean Tech, the french start up introduces the SubSea Quieter—a groundbreaking technology designed to shield marine ecosystems from noise pollution linked to maritime port and offshore works, including the installation of offshore wind turbine foundations.
With 14 dedicated employees and a commitment to growth, the start up has earned prestigious recognition, being selected for the highly selective « Accelerator » program of the European Innovation Council (EIC). This has granted them €2.39 million in subsidies and an entry into the EU’s capital for the next funding round. Greenov’s achievements also extend to winning the esteemed Port of the Future 2022 Innovation Awards.
In response to the award, Damien expressed his heartfelt gratitude, dedicating the prize to those diligently working to protect our oceans and secure a better future for humanity. His passion for maritime clean technology solutions underpins Greenov’s commitment to combating the threats of « blue deserts » within the next two decades.
Join us in celebrating Greenov’s remarkable achievement and unwavering dedication to protecting marine ecosystems—a journey where innovation meets environmental stewardship.
Let’s forge ahead with determination, passion, and a shared commitment to safeguard the oceans — one innovation at a time.
Read more about this award: Association of AMBA’S
We are thrilled to be featured in echo bruit magazine number 176, page 18-19!
Our Chief Business Officer, Gwenael Desse, dives deep into the innovative technology of our noise mitigation system, the SubSea Quieter.
Big thanks to CidB – Centre d’information sur le Bruit for this fantastic opportunity to share our commitment to a quieter and sustainable future. Stay tuned for more updates on our groundbreaking developments!
Beneath the surface of our oceans, human maritime activities often disrupt the natural soundscape of marine life. Greenov’s innovation, the SubSea Quieter (SSQ), is addressing this issue by offering a practical solution for reducing underwater noise.
At its core, the SubSea Quieter operates through a simple yet ingenious principle. Utilizing a waterproof patented membrane to create inflatable panels, it mirrors the concept of double glazing, adapted meticulously to the challenges posed by maritime conditions. This unique membrane, when inflated, creates an impedance loss for sound waves, resulting in a substantial reduction in noise levels—a significant step forward in minimizing the impact of human activities on marine ecosystems.
A notable feature of the SubSea Quieter is its modular and adaptable design. It can be tailored to suit various types of maritime work and specific site requirements. This adaptability, combined with a streamlined air management system, ensures that the technology can be integrated seamlessly into different operations.
One of the key components of the SubSea Quieter is the Air Management System, which injects the right amount of air at the correct pressure into the different layers of the membrane depending on their depth.
The Air Management System is made up of several pressure controllers/sensors and a command unit. It is made so the operator can control manually the pressure in the different panels (within security margins) or let the system regulate the air pressure and flow automatically.
The testing phase of that particular air management system, conducted in the first quarter of 2023, marked a pivotal point in the SubSea Quieter’s journey. The aim of the tests was to validate the System’s principles and functioning in water. Despite being made at a small scale, this test provided valuable insights, affirming the concept’s feasibility while pinpointing areas for improvement.
The technical requirements induced by pile driving led to a particular idea—the development of a system that manages the air from a watertight enclosure near the panel. This approach emerged as the most practical solution, avoiding potential technical and logistical complications. This innovation highlights Greenov’s commitment to adapting and evolving its technology to real-world conditions.
This test is the first in a long series that will run during 2023 and 2024. The various subsystems will be tested individually before being progressively assembled. The Greenov team’s objective is to be able to carry out the first test of the SubSea Quieter Pile Driving in February 2024 in the port of Saint Nazaire (France). A 10 m long and 5 m in diameter system will be tested.
Learn more about noise pollution here
Let’s forge ahead with determination, passion, and a shared commitment to safeguard the oceans — one innovation at a time.
Greenov proudly announces a groundbreaking achievement as our innovative noise mitigation system, the SubSea Quieter (SSQ), receives the esteemed « Solar Impulse Efficient Solution » Label. This prestigious recognition comes after an extensive evaluation by external independent experts, who rigorously assessed the SSQ against verified standards. Joining the exclusive #1000solutions challenge by the Solar Impulse Foundation, our technology (SSQ) is set to lead the way in profitable and sustainable solutions —making a significant impact on marine ecosystem protection.
Marine ecosystems face the harmful consequences of underwater noise pollution from human maritime activities like coastal and pile driving works. This is what Greenov’s SubSea Quieter (SSQ) is here to challenge with a revolutionary 3D membrane, fortified with a specially formulated coating for resistance and waterproofness. The membrane works by building inflatable panels, creating a remarkable break in impedance between water and introduced air—resulting in a significant attenuation of underwater sounds. Such acoustic efficiency is further amplified by the unique 3D membrane structure, cementing the SSQ as a game-changer in noise mitigation technology.
The « Solar Impulse Efficient Solution » Label is not merely an accolade; it is a celebration of collective efforts and enduring commitment. The SubSea Quieter (SSQ) was thoroughly assessed by independent experts, whose discerning eyes evaluated its feasibility, environmental impact, and profitability. Being part of the esteemed #1000solutions portfolio and showcased to influential decision-makers by the Solar Impulse Foundation Chairman, Bertrand Piccard, fills us with gratitude and hope. This recognition reaffirms our shared belief in fostering eco-friendly solutions that transcend boundaries and impact lives.
The « Solar Impulse Efficient Solution » Label bridges two crucial aspects — environmental consciousness and financial viability. It exemplifies our conviction that sustainable solutions can create a positive impact while being economically viable. With this recognition, we humbly embark on a path of continued innovation, grounded in the understanding that sustainability is not just an aspiration but an essential obligation.
The Solar Impulse Foundation is the driving force behind this remarkable initiative, committed to accelerating the implementation of clean and profitable solutions. With a steadfast focus on aiding decision-makers in both the business and government realms, the Foundation empowers environmental targets and ambitious energy policies. All these efforts collectively contribute to bringing impactful, sustainable solutions to the forefront, thus celebrating the legacy of the first solar-powered flight around the world.
At Greenov, we are ecstatic about the « Solar Impulse Efficient Solution » Label. As we strive to innovate to protect our oceans, this remarkable achievement fuels our passion to continue innovating for a better, quieter, and more sustainable future.
Let’s forge ahead with determination, passion, and a shared commitment to safeguard the oceans — one innovation at a time.
Learn more about this label: Solar Impulse
