Work

Life cycle environmental impact assessment of microalgae biodiesel derived from different processes

Year: 2025

Type: article

Abstract: Life cycle assessment（LCA）method was used to evaluate the environmental impact of biodiesel production through two different routes: one using microalgae cultured in freshwater and the other in wastewater. The life cycle model was established using eFootprint life cycle assessment software. The results showed that carbon emissions for producing 1 ton of biodiesel from microalgae cultured in freshwater was -5726.32 kg CO2 eq, while in wastewater it was -6799.59 kg CO2 eq. The entire life cycle of microalgae biodiesel demonstrates significant carbon sequestration effects. The cultivation, harvesting, and drying stages of microalgae were the key contributors to environmental impact throughout the biodiesel production process. Compared to the freshwater cultivation process, the wastewater cultivation method further reduces environmental impact. The use of wastewater treatment for microalgae cultivation presents an effective approach to reduce the environmental burden of biodiesel production, though attention must also be given to electrical energy consumption.

Source: Industrial Crops and Products

DOI: 10.1016/j.indcrop.2025.121381

Authors: Yunyun Liu, Rundong Xia, Yujing Wang, Yuejie Zhao, Miaomiao Ju

Institution: Shaanxi University of Science and Technology

Language: English

Topic: Algal biology and biofuel production

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

SDGs: Responsible consumption and production, Climate action, Affordable and clean energy, Clean water and sanitation

Open Access status: gold

Estimated APC paid: $3,720