Development of an Oxygen Supply Control Model for Recirculating Aquaculture Systems Based on Mass Balance Equations 


Vol. 15,  No. 3, pp. 265-272, Mar.  2026
https://doi.org/10.3745/TKIPS.2026.15.3.265


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  Abstract

This study proposes a simulation framework to reproduce dissolved oxygen (DO) dynamics in flow-through aquaculture systems and evaluate oxygen supply control strategies. A DO mass balance model based on a CSTR(Continuous Stirred-Tank Reactor) assumption was developed for two 40 ton tanks in a commercial aquaculture facility. The oxygen consumption rate, representing fish metabolism and other factors, was treated as a system variable and inversely estimated from measured DO time series using 1 minute observations of DO, water temperature, salinity, flow rate, oxygen supply, biomass, and feeding data. The reconstructed DO showed strong agreement with observations, with mean absolute errors(MAE) of 0.099 mg/L and 0.249 mg/L and mean absolute percentage errors(MAPE) of 0.992% and 2.245% for the two tanks, confirming that the model captures DO fluctuations at operational time scales. Analysis of the inferred consumption patterns indicated elevated oxygen demand 1–3 hours after feeding and a relatively stable baseline demand during nighttime, with consumption levels and variability changing under different operating conditions. Based on these results, oxygen supply control scenarios were simulated to assess DO stability, control frequency, and the potential for oversupply. The proposed simulator and estimated consumption profiles provide a virtual test environment for designing and validating PID and model predictive control strategies and for developing oxygen demand prediction models in smart aquaculture systems.

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[IEEE Style]

G. Park, S. Lee, J. Jung, S. Jo, W. Kim, H. Shin, "Development of an Oxygen Supply Control Model for Recirculating Aquaculture Systems Based on Mass Balance Equations," The Transactions of the Korea Information Processing Society, vol. 15, no. 3, pp. 265-272, 2026. DOI: https://doi.org/10.3745/TKIPS.2026.15.3.265.

[ACM Style]

Geonwoo Park, Sangyeon Lee, Jaeyoung Jung, Sengkyoun Jo, Woonjung Kim, and Hakjong Shin. 2026. Development of an Oxygen Supply Control Model for Recirculating Aquaculture Systems Based on Mass Balance Equations. The Transactions of the Korea Information Processing Society, 15, 3, (2026), 265-272. DOI: https://doi.org/10.3745/TKIPS.2026.15.3.265.

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