Improving Productivity and Sustainability of Aquaculture and Hydroponic Systems Using Oxygen and Ozone Fine Bubble Technologies
Kai Xu, X Mo, Xiaoyue Xu, Hongxia Wu
Abstract
High-density aquaculture and hydroponic systems are essential for sustainable food production, yet they often face persistent challenges in maintaining dissolved oxygen (DO) levels, controlling microbial activity, and optimizing nutrient cycling. This study investigates the integration of oxygen and ozone fine bubble systems as a solution to these issues, with a focus on their effects on system performance and productivity. Over a 12-week experimental period, DO levels, nutrient availability, and biological outcomes were monitored to evaluate the effectiveness of the proposed approach. The results showed that the combined oxygen and ozone fine bubble system increased fish growth rates by 52.8% and survival rates by 11.6%, while enhancing plant yield by 37.4% compared to the control group. Strong positive correlations were observed between DO levels and both fish growth (r = 0.96r = 0.96r = 0.96) and plant yield (r = 0.91r = 0.91r = 0.91), highlighting the critical role of oxygenation. Time-series data revealed stable improvements in DO levels and nutrient availability in the fine bubble system, with significant reductions in ammonia accumulation. These findings underscore the importance of precise oxygenation and microbial control in high-density systems. This study provides robust evidence for the practical application of fine bubble technologies in improving both ecological sustainability and economic efficiency. By addressing key limitations in current aquaculture and hydroponic systems, the research offers a pathway for scaling these technologies to meet the demands of modern food production.