Eco-Design of Renewable Energy-Driven Membrane Water Treatment Systems Based on Life Cycle Assessment and Circular Economy Principles

Abstract

Remote communities in developing countries face the dual challenges of clean water scarcity and environmental pollution. Traditional water treatment technologies often overlook their full life cycle environmental impact and resource circularity potential, especially in renewable energy-driven membrane technology applications, where membrane material waste and concentrate disposal are pressing issues. This study proposes an eco-design framework integrating Life Cycle Assessment (LCA) and Circular Economy (CE) principles to optimize renewable energy-driven membrane water treatment systems. By quantifying the environmental impacts at various stages of the system (material production, operation, maintenance, disposal), and designing closed-loop strategies for membrane material recycling and regeneration, concentrate valorization, and energy-efficient configuration. Using a renewable energy (solar-powered) nanofiltration (NF) water treatment system in Tanzanian communities as a case study, actual operational data and material information are collected. LCA software such as SimaPro is utilized for environmental impact assessment, and the feasibility of circular economy solutions is verified through techno-economic analysis. The study results indicate that eco-design can significantly reduce the carbon footprint and resource consumption of water treatment systems. Membrane material recycling and regeneration can reduce the environmental burden of membrane production by up to X%, and concentrate valorization can recover Y% of valuable substances. The optimized system achieves a Z% improvement in environmental benefits and a W% reduction in operating costs while providing clean drinking water. This research provides an innovative paradigm for sustainable water resource management in remote areas of developing countries, emphasizing the critical role of interdisciplinary integration in addressing global environmental issues. The proposed eco-design framework and circular economy strategies offer significant theoretical guidance and practical insights for promoting green technology development and achieving the United Nations Sustainable Development Goals.