Effects of Sodium Bicarbonate Supplements on Growth Performance and Quality of Marine Microalgal Inoculum Production

Main Article Content

Wasana Arkronrat
Chonlada Leearam
Rungtiwa Konsantad
Vutthichai Oniam

Abstract

The effects of sodium bicarbonate (NaHCO3) supplements (0.05, 0.25, 0.50, 1.0 g·L-¹) in the culture medium were examined on six marine microalgae inocula cultured under laboratory conditions (25±1 °C, 28 psu, 12L:12D, 3,000 Lux light intensity, Conway medium) for 10 days and compared to a control without NaHCO3. The parameters assessed included cell density (CD), specific growth rate (µ), division rate (K), and doubling time (D). The results indicated a positive effect on CD, µ, K, and D for the production of Chaetoceros calcitrans, Thalassiosira weissflogii, Chlorella spp., and Nannochloropsis oculata strains with NaHCO3 additions of 0.25, 1.0, 1.0, and 0.50 g·L-¹, respectively. Conversely, NaHCO3 concentrations of 0.25–1.0 g·L-¹ negatively impacted the CD, µ, K, and D for Tetraselmis suecica and Isochrysis galbana culture. Regarding inoculum quality after refrigerated storage at 4±1 °C, NaHCO3 supplements did not sustain the growth rates of C. calcitrans, T. weissflogii, and Chlorella spp. inocula cultured after storage for 7, 15, and 30 days. However, 0.5 g·L-¹ NaHCO3 maintained the growth rate of N. oculata cultured after storage for 7 days. This study provides comprehensive insights into the optimal NaHCO3 supplementation for maintaining each microalgal strain in a stable state for inoculum production applications.

Article Details

How to Cite
Arkronrat, W., Leearam, C., Konsantad, R., & Oniam, V. (2024). Effects of Sodium Bicarbonate Supplements on Growth Performance and Quality of Marine Microalgal Inoculum Production. Journal of Fisheries and Environment, 48(2), 85–93. https://doi.org/10.34044/j.jfe.2024.48.2.07
Section
Research Article

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