Our Story in a Nutshell
Launched in 2021, Grains to Greens tackles a critical challenge in the circular economy: transforming industrial waste into a resource. Partnering with Neon Raptor Brewing Co., our student-led team set out to investigate whether spent grain—a nutrient-rich by-product of the brewing industry—could serve as a viable, eco-friendly alternative to synthetic fertilisers.
Transforming campus allotments into living laboratories, students led a 14-week comparative study on Winter Broad Beans (Vicia faba). While the control group produced a marginally higher yield (201.75 g vs 196.75 g), plants treated with spent grain demonstrated consistent early growth and maintained a height advantage of 6.27 cm during late development, indicating sustained nutrient release.
Beyond soil health, the project cultivates future leaders through a peer-led model in which students manage experimental design, data collection, and analysis. Findings from our 2025 impact study show:
- 85% of participants developed career-relevant skills such as leadership and problem-solving.
- 98% reported increased awareness of zero-waste and circular economy principles.
- 91% felt a stronger sense of belonging within the campus community.
Today, Grains to Greens is extending its impact beyond the university. We are now sharing findings with local allotment holders, several of whom are trialling spent grain in their own plots. By demonstrating that sustainable solutions can be low-cost and locally sourced, the project empowers both students and communities to shape a greener future.
Why Spent Grain?
Recycled Nutrients
Rich in nitrogen, phosphorus, and trace minerals like magnesium, serving as a nutrient-dense organic alternative to synthetics. Delivers slow, sustained nutrient release that supports consistent vegetative development.
Circular Economy
Diverts industrial by-products from landfills and reduces reliance on finite, fossil-fuel-based chemical fertilisers. This closed-loop system minimises environmental risks such as nutrient leaching and groundwater contamination.
Community-Driven Science
Bridges academic theory with real-world application by treating local allotments as interactive research sites. Validates sustainable practices through active collaboration between students, brewers, and local growers.