Ammonia Influence on Bromate Development and Nitrogen Oxidation in Ozonated Seawater | ||
| Egyptian Journal of Aquatic Biology and Fisheries | ||
| Volume 29, Issue 5, September and October 2025, Pages 1447-1465 PDF (725.78 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejabf.2025.328350.4798 | ||
| Authors | ||
| Yanuariska Putra1; Jae-Yoon Jo2; Puji Rahmadi3; Evi Amelia Siahaan* 4 | ||
| 1Research Center for Conservation of Marine and Inland Water Resources, National Research and Innovation Agency, Cibinong 16911, Indonesia | ||
| 2Emeritus Professor, Department of Fisheries Biology, Pukyong National University, Busan, Republic of Korea | ||
| 3Research Center for Oceanography, National Research and Innovation Agency, Jakarta Utara 14430, Indonesia | ||
| 4Research Center for Food Technology and Processing, National Research and Innovation Agency, Yogyakarta 55861, Indonesia | ||
| Abstract | ||
| This study evaluated the impact of ozonation on seawater, concentrating on the generation of bromate, oxidation of nitrate and nitrite, and alterations in dissolved oxygen and pH levels. Experiments were performed with 1, 2, 3, and 4mg/ L ammonia concentrations to determine their effect on bromate development during ozonation. The results demonstrate that elevated ammonia levels caused a longer delay in the generation of bromate by 15, 30, 45, and 60 minutes, respectively. These results indicate that the concentration of ammonia available can significantly impact the suppression of bromate development. The nitrite and nitrate levels decreased during the ozonation process. Specifically, nitrite concentration decreased from initial values of 0.05, 0.10, and 0.15mg/ L to final values of 0.003, 0.049, and 0.107 mg/L, respectively. Similarly, the concentration of nitrate dropped from initial values of 1, 2, and 3mg/ L to final values of 0.63, 1.64, and 2.57mg/ L, respectively, after a duration of 60 minutes. Over 360 minutes, ozonation elevated DO from 6.03 to 14.77mg/ L. This was followed by a decrease in pH from 8.35 to 7.99. These findings highlight that adjusting ammonia loading and ozonation parameters can improve water quality, limit bromate development, and contribute to sustainable marine aquaculture. | ||
| Keywords | ||
| Ozonation; Bromate Development; Ammonia Loading; Marine Aquaculture; Water Quality | ||
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