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Solar-driven synthesis of proteins and lipids via photoelectrochemistry of living organisms

Project description

Reimagining food production for dinner in space

How can we grow food with no soil, no farms, and no pollution? The EIC-funded SOLARSPOON project is pioneering an approach using sunlight, air, and water to directly produce proteins and lipids. By integrating photosynthetic bacteria and food-producing microbes into biohybrid photoelectrochemical devices, SOLARSPOON enables solar-powered conversion of CO2 and nitrogen into edible materials. The system uses cyanobacteria and organic dyes to generate energy-rich substrates, feeding microbial cultures housed within the same device. The goal is to surpass the efficiency of traditional agriculture and reach 1 % solar-conversion efficiency. From remote communities to future space missions, SOLARSPOON’s vision of clean, decentralised food production could redefine how and where humanity feeds itself.

Objective

Biohybrid systems offer unique energy-efficient routes to harness solar energy for the fixation of CO2 and nitrogen into valuable, complex molecules. This project will integrate living photosynthetic bacteria and food-producing autotrophic bacteria into stand-alone photoelectrochemical devices tailored for the direct production of proteins and lipids from sunlight, air and water. Cyanobacteria will supply electrons via light-driven water oxidation, organic dyes will provide these electrons with sufficient energy to generate substrates that would directly feed either a culture or a consortia of food producing microorganisms in the same device. The result will be the demonstration of the first direct conversion of CO2 and N2 from air to protein- or lipid-rich food materials using solar energy, with the aim to produce a prototype that can reach 1% solar-conversion efficiency or surpass present food production processes via agriculture.
Our bioengineering efforts will focus on three key innovations: (i) overcoming complex electron transfer pathway barriers at the cell-electrode interface, aided by the coupling of electrode engineering with advanced modelling of the interface; (ii) expanding the range of Solar-to-X products to two essential food groups (proteins and lipids), enabled by the formation of novel microbial consortia on redox polymer films that mitigate their conflicting microenvironment needs; and iii) device engineering that synergizes the different outputs and needs of the bio-anode and cathode whilst also facilitating easy food-product collection. The delivery of our envisioned Solar-to-Food devices will open the door to re-imagining sustainable food production for off-grid locations, kitchens in future households and spaceships. Current food industries, such as our partner Solar Foods, would be an immediate benefactor. Our envisioned solar-to-lipids production process could be a stepping stone to fuels production lines of the future.

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Call for proposal

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(opens in new window) HORIZON-EIC-2024-PATHFINDERCHALLENGES-01

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Coordinator

THE CHANCELLOR MASTERS AND SCHOLARS OF THE UNIVERSITY OF CAMBRIDGE
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 1 103 809,50
Address
TRINITY LANE THE OLD SCHOOLS
CB2 1TN CAMBRIDGE
United Kingdom

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Region
East of England East Anglia Cambridgeshire CC
Activity type
Higher or Secondary Education Establishments
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Total cost

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Participants (4)

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