The SUSFEED 2 project aims to optimise the process of generating sustainable fish feed through mixing microbial fermentation from inexpensive mixed and/or waste gas streams. The project will also assess economic viability and carbon credentials of the process.

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Project Summary:

This project was originally funded as a feasibility study (FS036) and has now been awarded funding to continue the project into the R&D phase.

The aquaculture industry relies heavily on non-sustainable feed sources (fish meals or soy proteins). An alternative to these traditional protein sources is Single Cell Protein (SCP) derived from microbial fermentation. Fermentation processes for SCP production typically utilise sugars, agricultural and food wastes as feedstocks. Gas fermentation processes, in which gaseous feedstocks such as natural gas (methane) are used as a feedstock, are being commercialised for the production of SCP. These processes offer many advantages but still result in significant CO2 emissions, increasing the environmental footprint and reducing the overall carbon efficiency of the process.

SUSFEED will provide new technology for next-generation sustainable fish feed products for aquaculture, produced via mixed culture microbial fermentations from inexpensive mixed and/or waste gas streams. We aim to reduce and reuse the carbon dioxide production from gas fermentations and channel the carbon towards SCP production.

SUSFEED Feasibility Study-FS036 demonstrated that our novel microbial consortium could utilise pre-mixed gas feedstock to grow biomass efficiently.

Building on the success of SUSFEED FS036 in this follow-on R&D programme we aim to:
1. optimise and scale-up the bench-scale process;
2. produce a quantity of SCP product for a fish feed digestibility trial;
3. assess the impact of industrial feedstock impurities on the product quantity and quality as SCP.
4. Assess the economic viability and carbon credentials of the new process (LCA)

The SUSFEED process will improve the sustainability and economics of feed production by increasing the carbon efficiency, reducing the carbon footprint, and eliminating the competition with food production for land and water usage. The SUSFEED process will improve the sustainability of feed production by reducing greenhouse gas emissions, fixing CO2 as part of the process, and will overcome the land use issues associated with plant-based alternative fish feeds.

STATUS: Ongoing

Project Lead

CPI Innovation Services Ltd