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Water lentils: a valuable source of plant-based protein

HAS green academy is taking part in a research project that is investigating optimal and sustainable cultivation of water lentils (duckweed) in the Netherlands, including processing this ingredient into food products. This project is being performed in partnership with various knowledge institutions and SMEs with the aim of bringing water lentils into the food chain for consumers in an economically viable way.

Water lentils

The full title of the project is: water lentils: a valuable source of plant-based protein (the future of water lentils in NL) The collaborative partners in this project are Inholland University of Applied Sciences (lead), HAS green academy, Aeres University of Applied Sciences, van Hall Larenstein University of Applied Sciences and Hanze University of Applied Sciences Groningen. The project is funded by the national Taskforce for Applied Research SIA and is being run under the auspices of the CoE Groen collaboration.

The following SMEs are also participating in the project: Rinus&Hans, Profinutrients, Karel Bolbloemen, Bodec, Clyde Don Consultancy Food Physica, NMK Esbaco International, Fresh Monkeys, Fabafull, Future Foods, Essensor and MCLS Europe.

High nutritional value

In order to provide the world's current population with a source of sustainable protein, a protein transition is taking place from a reliance on animal protein to greater use of plant protein. This protein should preferably be sourced locally. Water lentils can play a key role in this transition, mainly thanks to its high nutritional value and the fact that it is relatively easy to grow and multiplies quickly. Water lentils are a very protein-rich crop and therefore offer a similar protein potential to legumes, such as peas, faba beans, and possibly even soy. In addition, water lentils contain high amounts of RuBisCo, a protein rich in essential amino acids.

To stimulate large-scale cultivation of water lentils in the Netherlands, the project focuses on four themes. Work package 1 will investigate the business case and LCA of cultivation by setting up a pilot-scale production system. Work package 2 will subsequently examine cost-effective drying techniques and various methods to improve the (sensory) quality of the biomass.

Work package 3 will study the nutritional and functional properties of water lentils and explore the various possibilities to use it as an ingredient in high-quality food products. The focus of the last work package (4) will be on disseminating knowledge. It is particularly important to communicate about all the developments surrounding this practically relevant innovation so that the general public is made aware of the substantial contribution water lentils can make to the current transition challenges that are facing the Netherlands.

Research into drying technology

Representatives of the Protein Transition in Food professorship and the Food Technology study programme at HAS green academy form the project leaders of work package 2 in this project. This is being performed in cooperation with Hanze University of Applied Sciences, Rinus&Hans BV, Bodec BV and Future Foods BV. This work package will investigate various technology used for drying. Cost-effectiveness and preserving the quality are essential in this respect, while integrating the technology with the cultivation techniques in work package 1 will also be considered. The potential technologies that will be investigated using a techno-economic feasibility study include air dryers, spray dryers, (vacuum) roller dryers, agitated thin film vacuum dryers (ATFD), membrane filtration, drum dryers and fluid bed dryers.

In addition to drying, ways to improve the quality of water lentils will also be studied. Extrusion and fermentation studies will be conducted to explore possibilities for improving the sensory properties. Membrane filtration will also be investigated as a way of potentially decreasing the manganese levels of water lentils. In collaboration with the SMEs involved, various graduation projects on the topics mentioned are currently taking place at both HAS green academy and at Hanze University of Applied Sciences.

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Duration

  • 2023
    1 juni
  • 2025
    1 juni