Roy Subha M, Machavaram Rajendra, Pareek C M, Kim Taeho
Agricultural and Food Engineering Department, IIT Kharagpur, 721 302, West Bengal, India.
Smart Aquaculture Research Centre, Chonnam National University, Yeosu, 59626, Republic of Korea.
Heliyon. 2024 Feb 16;10(5):e26367. doi: 10.1016/j.heliyon.2024.e26367. eCollection 2024 Mar 15.
Aeration plays a crucial role in aquaculture to maintain adequate dissolved oxygen (DO) levels in water, which is essential for supporting aquatic life. However, traditional aeration systems such as paddlewheel aerators or diffused air aerators often come with high energy consumption, frequent maintenance, and greater operational costs. To address these challenges, this research paper presents the development and evaluation of a more sustainable and cost-effective aerator, named the perforated pooled circular stepped cascade aerator (PPCSC), for intensive aquaculture. Laboratory experiments were conducted in a masonry tank to assess the performance of the PPCSC aerator with different bottom radii (R) and discharges (Q). The results showed that the highest standard aeration efficiency (SAE) of 4.564 ± 0.6662 kg O/kWh was achieved with a bottom radii (R) of 0.75 m and a discharge (Q) of 0.016 m/s. A developed regression model was found to effectively evaluate the standard oxygen transfer rate (SOTR) and SAE for different R and Q values used in the PPCSC system. Both R and Q were found to significantly impact the SOTR and SAE of the PPCSC aerator. Overall, the PPCSC aerator is a promising option for small-scale tank-based intensive aquaculture due to its high performance and lower operational costs.
曝气在水产养殖中起着至关重要的作用，以维持水中充足的溶解氧（DO）水平，这对支持水生生物至关重要。然而，传统的曝气系统，如叶轮曝气器或扩散空气曝气器，往往伴随着高能耗、频繁维护和更高的运营成本。为应对这些挑战，本研究论文介绍了一种更具可持续性和成本效益的曝气器——多孔汇集圆形阶梯式级联曝气器（PPCSC）的开发与评估，用于集约化水产养殖。在砖砌水箱中进行了实验室实验，以评估不同底部半径（R）和流量（Q）下PPCSC曝气器的性能。结果表明，底部半径（R）为0.75米、流量（Q）为0.016立方米/秒时，实现了最高标准曝气效率（SAE），为4.564±0.6662千克氧气/千瓦时。发现一个开发的回归模型能够有效地评估PPCSC系统中不同R和Q值下的标准氧传递速率（SOTR）和SAE。研究发现，R和Q均对PPCSC曝气器的SOTR和SAE有显著影响。总体而言，PPCSC曝气器因其高性能和较低的运营成本，是小型水箱式集约化水产养殖的一个有前景的选择。
