Sustainability Assessments in Bioethanol Production Systems

Sustainability assessments in bioethanol production systems evaluate the environmental, economic and social performance of converting biomass into liquid fuels. Central to these evaluations is the measurement of greenhouse gas emissions, energy balances and resource use across the full life cycle—from feedstock cultivation and harvest through processing, distribution and end use. The choice of feedstock (for example, sugarcane juice, molasses or lignocellulosic residues) and the configuration of processing facilities both exert a strong influence on carbon intensity, energy return on investment and water footprint. In recent years the concept of a circular bioeconomy has driven integration of heat and power cogeneration, valorisation of by-products such as bagasse and press mud, and development of biorefinery complexes that co-produce chemicals, animal feed and fertilisers alongside ethanol. Multi-criteria decision tools have been introduced to capture trade-offs among climate impact, land-use change, biodiversity and socio-economic indicators. These holistic approaches are increasingly applied to guide policy and investment towards low-carbon pathways that enhance energy security, rural development and waste minimisation on a global scale.

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Sustainability Assessments in Bioethanol Production Systems publication trend

The graph below shows the total number of articles in sustainability assessments in bioethanol production systems across all publications each year (not limited to Nature Index journals).

Technical terms

Life Cycle Assessment (LCA): A methodological framework to quantify environmental impacts of a product or process from cradle to grave.

Carbon Intensity (CI): The mass of greenhouse gas emissions, expressed as CO₂-equivalent, per unit of energy or product output.

Sugarcane Bagasse: The lignocellulosic fibrous residue remaining after juice extraction from sugarcane stalks, often used as a fuel or feedstock for bioproducts.

GREET Model: A simulation tool for evaluating greenhouse gas emissions and energy use in transportation fuels and related processes.

Biorefinery: An integrated processing facility that converts biomass into a spectrum of fuels, power, chemicals and other bioproducts in a sustainable manner.

References

1. Life Cycle Greenhouse Gas Emissions of Brazilian Sugar Cane Ethanol Evaluated with the GREET Model Using Data Submitted to RenovaBio. Environmental Science and Technology (2023).
2. A review of current technologies for the sustainable valorisation of sugarcane bagasse. Journal of Environmental Chemical Engineering (2024).
3. Sustainable Valorization of Waste and By-Products from Sugarcane Processing. Sustainability (2022).