Small Inputs, Big Impacts: How Enzymes Reduce Environmental Footprints 

Quantifying the Environmental impacts of Enzymes through Life Cycle Assessment

Enzymes are natural biological catalysts that play an essential role in all living organisms. In industrial applications, enzymes are typically produced through fermentation processes using renewable feedstocks such as sugars. They are readily biodegradable and are increasingly used across a wide range of sectors. Beyond their biological properties, enzymes are of growing interest because they can significantly improve process efficiency, often enabling reductions in energy use, raw materials, water use, or processing time compared to conventional alternatives.

Building on this potential, RDC Environment conducted a comprehensive Life Cycle Assessment (LCA) to quantify the environmental benefits associated with enzyme use in current industrial practices. The study focuses on three representative product applications: detergents, barley brew, and wafers. In each case, a scenario with enzyme use is compared to a scenario without enzymes.

By applying internationally recognised LCA standards and the European Product Environmental Footprint (PEF) framework, the study provides robust, transparent and policy-relevant insights into the role enzymes can play in more sustainable productioxn systems.

Three Industrial Use Cases for Enzymes

The study examines three distinct applications where enzymes are used to improve process performance:

• Detergents: Enzymes enable the same cleaning performance at lower washing temperatures and with reduced surfactant content, leading to substantial energy savings during the use phase.
• Barley brew (beer): Additional enzymes allow the malting phase to be skipped, reducing both energy demand and barley consumption during beverage production.
• Wafers: Enzymes reduce the water content of the batter, shortening baking times and lowering energy consumption during the baking process.

All scenarios are grounded in current industrial practices and supported by literature and industry data. Consequently, the conclusions of the study remain valid as long as these practices remain representative; changes in technology or production routes would warrant a future update.

Key Findings and Interpretation

The study shows that enzyme use generally leads to a reduction in environmental impacts, although the strength of this conclusion varies by application:

• Detergent case: Enzyme use results in a significant and robust reduction across all assessed impact categories. Climate change impacts are reduced by approximately 27%, driven mainly by lower energy demand during use.
• Barley brew case: The results indicate a probable reduction in overall environmental impact (around 9% for climate change). While sensitivity analyses confirm that the enzyme scenario consistently outperforms the non-enzyme scenario, residual uncertainties in secondary data prevent a fully definitive conclusion at this stage.
• Wafer case: The analysis does not yet support a claim of environmental improvement. The observed climate change reduction of around 3% is not sufficient given current uncertainties. Follow-up studies are recommended to refine data quality and explore process optimisation pathways.

Across all cases, the environmental benefits induced by enzyme use far exceed the additional footprint associated with enzyme production itself, as only very small quantities of enzymes are required to deliver their functional effect.

Looking Ahead: The Importance of Context and Future Updates

An important insight from the study is the strong link between environmental benefits of enzymes and energy consumption. As Europe continues its transition towards a cleaner energy mix, the relative environmental advantage of energy-saving measures may evolve. This highlights the importance of regularly updating LCAs to reflect changing background systems and ensures that conclusions remain relevant over time.

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Additional Technical Information

The assessment follows a cradle-to-grave approach, covering the entire life cycle of the products, from raw material extraction and production through use and end-of-life. This comprehensive scope ensures that potential environmental benefits or trade-offs linked to enzyme use are not shifted from one life cycle stage to another.

While the full life cycle is considered, the modelling effort focuses in particular on stages where enzyme use induces changes in the production or use phase. For life cycle stages that are identical in both scenarios (with and without enzymes), a simplified but consistent modelling approach is applied. This allows the analysis to remain both rigorous and proportionate.

The study is fully aligned with ISO 14040/44 principles and the PEF methodology, reflecting RDC Environment’s strong expertise in applying harmonised European LCA frameworks. For detergents and barley brew, the relevant PEF Category Rules (PEFCRs) are used as the backbone of the modelling, relying on default datasets and assumptions where appropriate. As no PEFCR is currently available for wafers, this case is modelled using high-quality literature data and the best available industry information.

The geographical scope is Europe, with all three cases designed to reflect average European production and consumption conditions rather than country-specific situations. To ensure credibility and transparency, the LCA report has undergone a critical review by an independent panel of experts, in accordance with ISO 14040 requirements.