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https://doi.org/10.62836/iaet.v2i1.258
Kai Xu, Xiaoyue Xu, Hongxia Wu, Ruihong Sun, & Yu Hong. (2023). Ozonation and Filtration System for Sustainable Treatment of Aquaculture Wastewater in Taizhou City. Innovations in Applied Engineering and Technology, 2(1), 1–7. https://doi.org/10.62836/iaet.v2i1.258
Volume 2, Issue 1

Ozonation and Filtration System for Sustainable Treatment of Aquaculture Wastewater in Taizhou City

Aquaculture wastewater has become a growing concern, containing high concentrations of nitrogenous compounds, organic matter, and suspended solids, which, if untreated, can disrupt aquatic ecosystems and hinder the long-term viability of farming operations. This study evaluates the performance of an integrated ozonation-filtration system implemented at an aquaculture facility in Taizhou, Zhejiang Province. Under optimal conditions, the system achieved NH3-N and COD removal efficiencies of 87.4% and 79.2%, respectively, with turbidity consistently reduced by over 90%. Reaction kinetics followed a pseudo-first-order model, with a peak rate constant of 0.120 min-1 at an ozone dosage of 15 mg/L, emphasizing the importance of precise ozone control for efficient pollutant removal. Long-term trials over 50 weeks demonstrated the system’s operational stability, maintaining pollutant removal efficiencies with minimal seasonal variation. Dissolved ozone concentrations remained below the safety threshold of 0.01 mg/L, ensuring compliance with environmental standards. The study also identified a flow rate of 5 L/min as optimal, achieving 93% turbidity removal at an energy consumption of 0.208 kWh/m3, balancing treatment efficiency with energy use. In addition to its technical performance, the system offers significant economic and environmental benefits. With an operational cost of $0.12/m3 and a 70% reduction in freshwater demand, it provides a practical and sustainable solution for aquaculture wastewater management. These results demonstrate the potential for scaling this technology to address broader wastewater treatment needs, supporting sustainable aquaculture practices and environmental protection.

aquaculture; wastewater treatment; ozone-filtration system; pollutant removal; water reuse

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Supporting Agencies

  1. Funding: Not applicable.