# Upcycling of Beer Processing Residues: Insights for Microbreweries Sustainability

## TL;DR

This review explores how microbreweries can turn beer-making waste into valuable products, promoting sustainability and economic growth.

## Contribution

The paper provides new insights into upcycling brewing residues, particularly in the context of the Brazilian microbrewery sector.

## Key findings

- Brewer’s spent grain can be used in food products like bread and nutrition bars due to its nutritional value.
- Brewing residues can be transformed into biofuels, biogas, and biopolymers, supporting circular economy principles.
- Adopting sustainable practices helps microbreweries reduce waste and align with global sustainability goals.

## Abstract

The rapid growth of the microbrewery sector, driven by
the increasing
demand for craft beers, has highlighted the importance of managing
brewing residues to ensure environmental and economic sustainability.
This review explores the primary byproducts of beer productionbrewer’s
spent grain (BSG), brewer’s spent yeast (BSY), and hot trubanalyzing
their composition and potential for upcycling. By exploring the Brazilian
microbrewery sector as a case study, this work highlights its growth
and challenges, while drawing insights that resonate with the global
interest in sustainable practices within the craft beer industry.
Traditional applications, such as animal feed and fertilizer, are
expanded with new approaches like biofuel production, biogas, biopolymer
synthesis, prebiotics, and healthy food ingredient development. An
emphasis on the applications of BSG in food formulations, such as
bread, cookies, nutrition bars, beverages, meat analogs, yogurt, and
others, highlights its nutritional value and functional properties
for developing food products. By integrating sustainable practices
and advanced processing technologies, brewing residues can be transformed
into high-value products, reducing waste and fostering economic growth.
This review concludes that adopting circular economy principles is
essential for aligning microbrewery operations with global sustainability
goals while unlocking the potential of brewing byproducts for diverse
industrial applications.