Core technologies
Aeration Technology
Our award winning aeration technology is being implemented for continuous water treatment technologies at large scale across the globe. The example facility shown here achieves a 40% reduction in power under continuous operating conditions. Our aeration technology has been demonstrated across a wide range of waste streams, configurations and markets with partners who include several Fortune 500 companies. The fact our wastewater clients are installing at ever increasing scale speaks for itself, underpinned by competitive performance and design versatility
Mass Transfer
Matsya gas transfer hardware, shown to the left compared to a conventional sparger, generates the smallest mono-disperse bubbles for a given energy input of any gas transfer system. We have developed our own bespoke spargers which generate microbubbles at extremely low pressure drop, enabling us to use blowers instead of compressors with >70% reduction in power for the same oxygen transfer. DZFO generated bubble clouds, typical of the size used in our fish platform, are mono-disperse (all of a similar size) in the range 5-7 micrometres in diameter. These microbubbles provide a very high surface area to volume ratio for gas transfer. They also achieve near instantaneous oxygen transfer into the aqueous phase thereby meeting the oxygen requirements for optimal fish growth.
Oxygen solubility
Oxygen solubility in water which is typically in the form of air, is a function of temperature, pressure gas and saturation vapour pressure of the gas. Generally oxygen saturation (dissolved concentration) is increased by reducing temperature or increasing pressure as seen in systems such as CO 2 dissolution in sparkling water or sparkling wine.
Matsya's "microbubble bank" enables oxygen supersaturation to be achieved and maintained at atmospheric pressure, significantly reducing system complexity and capital cost.
Water Treatment Technologies
Matsya's superoxide disinfection system achieves 5-7 log disinfection levels over a near instantaneous time scale. This is supplemented by the scouring action of smaller bubbles which can remove surface borne biofilms and provides a means of continuous clean up of diffusers which remain operational for long run times (measured in years).The image here shows disinfection and biofilm removal using confocal microscopy. Free-radical rich superoxide generating microbubbles are particularly good at breaking "hard to oxidise" compounds at high concentration.
Ammonia and Carbon Dioxide Recovery - Desai-Zimmerman Microbubble Stripping
Our advanced ammonia removal system can strip dissolved ammonia below the detectable limit in ~5-8 minutes or 95% removal in ~1 minute, compared to competitive technologies which can take up to 30 hrs to remove 95% ammonia. This is dependent on initial ammonia concentration , but with no limitation on the initial ammonia concentration. Fast stripping equates to low operational cost, which can be as low as 0.02 kWh per kg ammonia removed, which makes a compelling business case. We work across a wide range of clients to provide bespoke ammonia management solutions who have come to their own conclusions alongside performance.
The same process is used for the recovery and/or removal of dissolved carbon dioxide and indeed other volatile metabolites. Dissolved gases and volatiles can be continuously and simultaneously stripped from solution and either discharged to atmosphere or recovered by reabsorption, having a positive impact on fish health and rate of growth.
