Innovative Water Recirculation Based Aquaculture for Sustainable Urban Fish Production

Rapid urbanization and population growth have intensified the demand for safe and nutritious food produced close to consumption centers. Conventional aquaculture practices often require large volumes of water, extensive land and suitable environmental conditions, which are difficult to obtain in densely populated cities. Recirculatory aquaculture systems RAS have emerged as a technologically advanced and resource efficient approach that enables intensive fish culture within confined spaces while maintaining high water quality. RAS operate by continuously treating and reusing culture water through mechanical biological and chemical filtration processes. Emphasis is placed on system engineering water quality management species selection economic considerations environmental sustainability and integration with urban agriculture. The adoption of RAS has the potential to transform urban food systems by enabling year round production of high quality fish with minimal environmental footprint.