Sustainable Coffee Production: Biotechnology, Circular Bioeconomy, and Climate-Smart Agriculture

Coffee production faces an unprecedented convergence of challenges: climate change, disease pressures, resource constraints, and the need to sustain the livelihoods of millions of smallholder farmers. Biotechnology offers a suite of tools to address these challenges, from climate-resilient varieties to resource-efficient production systems and waste valorization strategies. This review synthesizes current knowledge on sustainable coffee production, examining the application of biotechnological approaches for achieving sustainability across the coffee value chain. Climate-resilient coffee production requires the development of varieties with improved tolerance to drought, heat, and disease, coupled with agroforestry systems that buffer microclimate extremes. A meta-analysis of 18 cultivars identified intermediate shade cover (LAI ≈ 1, ~ 10–40%) as optimal, balancing microclimate regulation (≈ 3°C buffering), fruit set, and fruit drop, while providing staple food and additional income. Disease management strategies include marker-assisted selection for multiple disease resistance, gene pyramiding for durable resistance, and biological control approaches. Resource use efficiency encompasses nitrogen use efficiency (GS-GOGAT pathway), water use efficiency (aquaporins, irrigation), and phosphorus use efficiency (mycorrhizal symbiosis). Post-harvest biotechnology includes fermentation processes with starter cultures, solar drying techniques that reduce energy use by 28%, and waste valorization within circular bioeconomy frameworks. The carbon footprint of coffee production is dominated by cultivation (70–75% of total), followed by consumption (12%), with roasting and hulling dominating freshwater ecotoxicity-related impact categories (> 90%). The Net Energy Ratio (NER) can be increased from 0.82 to 2.2 through sustainable practices including organic fertilizers, solar drying, efficient roasting machinery, and biogas production from coffee waste. Circular bioeconomy approaches valorize spent coffee grounds, husk, pulp, wastewater, and silverskin into bioenergy, fertilizers, nanomaterials, antioxidants, and dietary fiber. Socio-economic considerations include smallholder farmers and market access, concentration of market power, certification and market incentives, and gender and social inclusion. Future directions include the integration of biotechnology with agroecological approaches, genotype-specific management recommendations, circular bioeconomy expansion, and climate-smart agriculture. This review provides a comprehensive synthesis of sustainable coffee production, identifying key technologies, strategies, and research priorities for ensuring a sustainable future for coffee.