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Home»News»Plant Health»Zayndu’s chemical-free ‘activated air’ seed sterilisation solution
Plant Health

Zayndu’s chemical-free ‘activated air’ seed sterilisation solution

Anthony JamesBy Anthony JamesJanuary 19, 2021No Comments
Zayndu's chemical-free ‘activated air’ seed sterilisation solution
Zayndu's chemical-free ‘activated air’ seed sterilisation solution [Image source: Zayndu]
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Loughborough University spinout Zayndu Ltd has launched Aurora Z10, which it claims is the world’s first ‘activated air’ seed sterilisation system. The new seed cleaning solution debuts at the ‘Keeping it clean with agri-tech innovation’ Agri-TechE event*, being staged online today. The system provides a dry alternative to chemical treatment or washing. It enables high-value seeds such as tomato or fast-growing seeds like rocket – to be disinfected for the first time.

Seed cleaning reduces the pathogen load on the seed and protects the soil from contamination with seedborne fungal infection. However, many of the chemicals widely used for disinfection are being withdrawn from use so alternatives are urgently needed.

The new system takes its name from the Aurora Borealis – the northern lights – a naturally occurring plasma created when an electric current moves through air.

“The Aurora Z10 is the first in a series of products and is aimed at high value seeds for which there is no treatment at present,” explained Ralph Weir, CEO of Zayndu. “The seeds are contained in a sealed rotating drum and we introduce a current, which splits oxygen and nitrogen molecules into individual atoms creating a plasma. This ‘Activated Air’, which is technically a blend of RONS – Reactive Oxygen and Nitrogen Species – is a powerful disinfectant. The RONS are desperate for something to latch on to and tear apart bacteria, fungi or viruses present in the chamber. The seeds are not affected as they are protected by their thick walls, so coming out of the drum are just cleaned seeds and fresh air.”

Zayndu has launched Aurora Z10, the first dry cleaning technology for seeds
Zayndu has launched Aurora Z10, the first dry cleaning technology for seeds [Image source: Zayndu]
The new technique overcomes a number of problems faced by seed suppliers, according to Weir: “The gold standard fungicide seed treatment is Thiram, which prevents damping-off diseases in seedlings,” he said. “This has recently been withdrawn, so the pathogen load on seeds is increasing, leading to the waste of seed or risk of contaminating the soil. We have done trials of our technology with many crop varieties and it both destroys the pathogens and typically boosts germination – one example being a fourfold increase in early germination of winter wheat, when compared with untreated seed.”

Zayndu’s first product has a capacity of 1kg of seed per batch so the company is concentrating on high value seed such as flowers, fruit and vegetables – tomato seeds can be worth €5 a seed.

Ralph Weir, CEO of Zayndu
Ralph Weir, CEO of Zayndu

However, further products are in production, with a larger system, the Z100, due for commercial availability in the summer, with ever-larger systems thereafter. “The Z10 is great for high-value seeds processed in small batches, of grams to kilograms – but carrots are processed in tonnes/day throughput,” noted Weir. “We’re working towards those systems now. Some seeds are untreatable at present, for example fast-growing salads where the time to harvest is too short to allow the chemicals to dissipate or where the seeds, like basil and other herbs are mucilaginous and germinate on contact with water. This is problematic as existing decontamination involves chemicals dissolved in water or a hot dip at 500°C. Our treatment is completely dry, enabling disinfection of herbs, salads or staple crops such as wheat.”

Weir will discuss the new technology at Agri-TechE’s first event of the year. Agri-TechE is a membership organisation that brings together technologists with farmers, growers and scientists to create an innovation ecosystem.

“The agri-food industry is highly regulated and relies on large volumes of water for washing and chemicals for hygiene to meet stringent quality and safety standards,” noted Agri-TechE director Dr Belinda Clarke. “Zayndu’s ‘activated air’ technology is one of a number of emerging approaches that offer sustainable alternatives and other benefits. We look forward to exploring these in the virtual meeting which is also open to non-members.”

*Agri-Tech Explore: Keeping it clean with agri-tech innovation, is being held virtually on Tuesday 19th January 2021 from 14:00-16:00. Registration www.agri-tech-e.co.uk/upcoming-events

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Anthony James

With over 20 years experience in editorial management and content creation for a broad spectrum of market-leading B2B magazines and websites in the transport and technology sectors, Anthony has written news and features covering everything from airport security to autonomous vehicles, and stadium design to sustainable energy.

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