Title: Green algae Caulerpa lentillifera cultivation technique utilising CO₂ and its social impacts

Authors: Mir Shariful Islam; Izuru Senaha; Kazunari Nagamatsu; Yoshifumi Yoda; Bidyut Baran Saha

Addresses: Department of Oceanography, University of Dhaka, Dhaka-1000, Bangladesh; Mechanical Engineering Department, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan ' Faculty of Engineering, Department of Mechanical Systems Engineering, University of the Ryukyus, 1 Senbaru, Nishihara-Cho, Okinawa, 903-0213, Japan ' Faculty of Engineering, Department of Mechanical Systems Engineering, University of the Ryukyus, 1 Senbaru, Nishihara-Cho, Okinawa, 903-0213, Japan ' Faculty of Engineering, Department of Mechanical Systems Engineering, University of the Ryukyus, 1 Senbaru, Nishihara-Cho, Okinawa, 903-0213, Japan ' International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan; Mechanical Engineering Department, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan

Abstract: The demand for the Caulerpa lentillifera, an important mariculture species in Okinawa, Japan, is rapidly increasing due to its wide use as food. Moreover, the extracted sulphated polysaccharides from Caulerpa lentillifera inhibit coronavirus. However, the harvesting capacity is insufficient throughout the year as per demand. Importing food from abroad due to COVID-19 poses a severe health risk, and local production needs to be increased. Accordingly, it is required to ensure the supply of this algae by improving the production technologies. It has been reported that adding CO₂ can upsurge the growth rate of algae to seawater, but no case has been yet examined on a laboratory scale. Therefore, the growth effect was observed to increase the weight ratio by about 1.8-fold in CO₂-enriched seawater. Moreover, the high value of R² (0.9974) and low value of RSS (0.00198) implied that modified Gompertz model was significantly fitted with the experimental data.

Keywords: algae; Caulerpa lentillifera; COVID-19; CO₂; Gompertz model; logistics model.

DOI: 10.1504/IJISD.2024.135261

International Journal of Innovation and Sustainable Development, 2024 Vol.18 No.1/2, pp.146 - 167

Received: 30 Aug 2021
Accepted: 20 Apr 2022
Published online: 03 Dec 2023 *

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