Gravity aeration system in cascade for pisciculture in field condition

Sistema de cascata de aeração para psicultura em condições de campo

ABSTRACT

The maintenance of the optimal levels of dissolved oxygen (DO) in fish production ponds is critical for maximizing productivity and minimizing stress-induced mortality among aquatic species. To address this challenge, aeration systems play a vital role in enhancing DO levels. This study assesses the efficacy of a gravity aeration system, specifically a cascade aerator, situated downstream of constructed wetlands and upstream of a recirculating fish farm pond in field conditions. Through comprehensive analysis, we evaluated key parameters including the overall oxygen transfer coefficient (Kla), standard oxygen transfer rate (SOTR), and standard aeration efficiency (SAE) across varying conditions. Our results highlight the cascade aerator’s superiority in delivering a cost-effective and efficient solution compared to alternative aeration systems, particularly in small-scale fish production ponds.

Keywords
fish farming; cascade aerator; water reoxygenation