Assessment of aquaponics as a sustainable food production system for urban agriculture

Urban Farm DB summary

This 12-month study (March 2022-February 2023) at the University of São Paulo, Brazil, evaluated the productivity, water efficiency, and economic viability of a media-bed aquaponics system compared to conventional hydroponics and soil-based cultivation. Lettuce and basil were grown alongside Nile tilapia. Aquaponics used 78.2% less water than soil-based production and 22.1% less than hydroponics per kilogram of produce. Lettuce yields in aquaponics reached 4.83 kg/m², slightly below hydroponics (5.12 kg/m²) but well above soil cultivation (3.27 kg/m²), and the aquaponics unit achieved economic break-even at month 9 and returned a 14.3% annual profit margin.