Journal of South China University of Technology (Natural Science Edition) ›› 2015, Vol. 43 ›› Issue (3): 121-129.doi: 10.3969/j.issn.1000-565X.2015.03.018

• Environmental Science & Technology • Previous Articles     Next Articles

Effects of Arrangement of Venturi Aerators on Aeration in Re-Circulating Water

Cheng Xiang-ju1 Kuang Yun-qi1 Lin Wen-xin1 Xie Jun2 Xu Ting-da1   

  1. 1． School of Civil Engineering and Transportation，South China University of Technology，Guangzhou 510640,Guangdong，China;2． Pearl Ｒiver Fisheries Ｒesearch Institute，Chinese Academy of Fishery Sciences，Guangzhou 510380,Guangdong，China
  • Received:2014-05-06 Revised:2014-10-30 Online:2015-03-25 Published:2015-02-10
  • Contact: 程香菊(1974-)，女，博士，教授，主要从事湖泊、水库、河流、河口、水产养殖池塘等的水力与水环境相关研究． E-mail:chengxiangju@scut.edu.cn
  • About author:程香菊(1974-)，女，博士，教授，主要从事湖泊、水库、河流、河口、水产养殖池塘等的水力与水环境相关研究．
  • Supported by:
    Supported by the Earmarked Fund for Modern Agro-Industry Technology Ｒesearch System(nycytx-49-13)，the Open Research Fund Program of State Key Laboratory of Hydroscience and Engineering(sklhse-2013-B-02)and the National Natural
    Science Foundation of China(NSFC)(50979118)

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Abstract: In order to achieve dynamic balance in a re-circulating aquaculture system (ＲAS)，the idea of“oppo-sing flow”and the principle of Venturi air entrainment were adopted，and 15 experimental conditions were deter-mined to investigate the effect of opposing flow on the aeration in water with different Venturi settings． The results show that the volumetric mass transfer coefficient of oxygen is proportional to water flow rate，but is inversely pro-portional to Venturi setting depth at the same flow rate． By comprehensively considering the aeration effect and the re-circulating opposing flow characteristics，it is suggested that Venturi aerator should be set as A—B stagger layer at the beginning and the end of cultivation，while it should be switched to A—C stagger layer in the mid-term culti-vation．

Key words: Venturi aerator, re-circulating aquaculture system, aeration, opposing flow