Study on CO₂ removal method in recirculating aquaculture waters

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• 作者：Yongmei Hu^a ;   ; ¹ ; Qi Ni^b ;   ; ^c ; Yanxiang Wu^a ; Yulei Zhang^c ; Chongwu Guan^c ;   ; ^b ;   ; ^{niqi@fmiri.ac.cn}
• 关键词：Recirculating aquaculture water ; CO₂ removal device ; testing ; impact factors ; CO₂ removal efficiency
• 刊名：Procedia Engineering
• 出版年：2011
• 出版时间：2011
• 年：2011
• 卷：15
• 期：Complete
• 页码：4780-4789
• 全文大小：422 K

文摘

The dissolved CO₂ accumulation has become an important factor restricting production in the high-density recirculating aquaculture system in which pure oxygen injection is used. In this paper, a novel CO₂ removal device is designed for the recirculating aquaculture water environment based on the principle of gas exchange. In terms of experiments, the DOE (design of experiment) method is applied to design three factor two level orthogonal experiment, Further, significance effect of gas to liquid ratios (G / L), inlet CO₂ concentration, the water flow rate (Q_W) on CO₂ removal efficiency is analyzed. Results show that G/L has the most significant influence on the CO₂ removal efficiency. Influences of the latter two on CO₂ removal efficiency are not apparent. Tests results of G/L effect on CO₂ removal efficiency show that, when G/L=1?, CO₂ removal efficiency increases rapidly with the increase of G/L; when G/L=5, CO₂ removal efficiency=80 % ?8 % ; when G/L=8, CO₂ removal efficiency=86 % ?2 % , when G/L>8, CO₂ removal efficiency increases gently with the increase of G/L. Considering both system energy saving and effective removal of carbon dioxide, G/L=5? is considered to be the best for the aquaculture water CO2 removal device running, CO₂ removal efficiency=80 % ?2 % .