Turning dust into gold: finding value in cherry and seaweed waste
Innovative products made from agricultural waste materials are being tested for their benefits to human and crop health, in new research projects we are funding.
Scientists at the University of Kent are working with companies to transform wasted cherries into healthy, nutritious food ingredients and using seaweed waste to boost agricultural crop health and growth.
If successful, the new products will not only benefit the environment by reducing waste but also create new revenue streams and value for the businesses.
The two projects were each awarded £25,0000 by Growing Kent & Medway, as part of six projects funded to advance sustainable innovation in UK plant-based food and farming.
Cherry on the cake
Kent-based fruit grower, Rent A Cherry Tree Ltd, is working with Dr Marina Ezcurra, University of Kent, to test the nutritional value of powders made from the pulp left over after pressing their cherries into juice. The powders could be used as natural food ingredients, an alternative to chemical additives in ultra-processed foods.
Michael Dallaway, Managing Director of Rent A Cherry Tree, said: “Our previous collaboration with the University of Kent discovered our cherry pulp is rich in anthocyanins, natural compounds with established health benefits. This project will now test the health properties of our cherry powders and their potential as high-quality food ingredients.
“There are currently no 100% natural, British cherry powders on the market; our innovation will fill this market gap while developing capabilities to upcycle agricultural waste, driving future commercial and environmental benefits.”
Michael Dallaway, Rent A Cherry Tree Ltd
Seaweed on soils
Nutri-San Ltd create animal feed from sustainably farmed seaweed. Their pelleting process creates waste seaweed powders, which Dr Sara Lopez-Gomollon at the University of Kent will test as a natural fertiliser for use in agriculture. The trials aim to demonstrate the benefits of their residue powders in boosting plant growth, improving soil health, and enhancing the crops’ resilience to environmental stresses.
Michelle Marin-Chau, Director of Nutri-San, said: “These trials will not only help us move towards zero waste, but also help farmers become more sustainable by reducing the need for chemical inputs and fertilisers.
“This project builds on our ongoing partnership with the scientists at the University of Kent, and we hope the funding will pave the way for long-term field trials. There is already significant evidence of the power of seaweed as a biostimulant, and this could lead the way to establishing its use in more crops, helping the environmental sustainability of our farming systems in the UK.”
Seaweed powders trialled on depleted in soils in the Biotechnology Hub, University of Kent
Simon Barnes, Director of Growing Kent & Medway, who funded the research projects, said: “In a resource-constrained world, it is exciting to see an example of an innovation that uses the concept of second harvest to bring new resources into a new alliance to develop new products. Growing Kent & Medway, through investment in facilities and knowledge, can bring excellence together where this has previously not been the case. The outcome is a more resilient food and farming sector, driving value that could not previously be achieved. The outcome, new affordable products.”
Waste cherry pulp from juicing
We recently published a report highlighting the potential to grow a biobased circular economy, you can download the report here, ‘Plant Crop Waste and Valorisation in South East England.’