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循环水养殖系统微细悬浮颗粒的分布规律研究

  1.  (1中国海洋大学水产学院，山东 青岛 266003；
    2新疆额尔齐斯河流域开发工程建设管理局，新疆 乌鲁木齐 830000)
  • 出版日期:2021-04-20 发布日期:2021-06-15
  • 通讯作者: 黄志涛（1982—），男，博士，副教授，研究方向：设施渔业。E-mail：huangzt@ouc.edu.cn
  • 作者简介:段姗杉（1997—），女，硕士研究生，研究方向：设施渔业。E-mail：1184552361@qq.com 杨晨（1977—），男，高级工程师，研究方向：设施渔业。E-mail：yangchen500@sina.cn
  • 基金资助:
    智能农机装备国家重点研发计划项目“水产动物重要生理生态行为与环境适应机理研究（2017YFD0701701）”

Distribution of suspended fine particles in recirculating aquaculture system

  1. (1 Fishery College, Ocean University of China, Qingdao 266003, China;
    2 Xinjiang Irtysh River Basin Development Project Construction Administration Bureau, Urumqi 830000, China)
  • Online:2021-04-20 Published:2021-06-15

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摘要： 高密度循环水养殖系统微细悬浮颗粒物(<30 μm)的去除，是其水环境调控的关键。采用库尔特粒度分析仪分析大西洋鲑(Salmo salar)循环水养殖系统微细悬浮颗粒的时空分布，结果显示：系统中粒径为1~3 μm的颗粒占总颗粒数的98.36%，3~15 μm的占1.63%，15~30 μm的仅占0.01%，系统内微细悬浮颗粒数量、总体积、总表面积的范围分别为（0.54~1.5）×106个/mL、（0.97~6.3）×106 mm3 /mL、（0.24~1.3）×107 mm2/mL；颗粒数量分布方面，随着粒径的减小，各样品颗粒数量迅速增加；体积分布方面，颗粒粒径越大，颗粒总体积越大；表面积分布方面，随着粒径的增大，总表面积呈现先减小后增大的趋势；泡沫分离器和浸没式生物滤池都呈现了很强的微细悬浮颗粒截留能力。本研究为揭示稳定运行的循环水养殖系统的微细悬浮颗粒的分布状况，为选用不同的固液分离技术、提高固体颗粒物的去除效率提供理论指导和参考。

关键词: 循环水养殖系统, 大西洋鲑(Salmo salar), 微细悬浮颗粒, 粒径分布(PSD), 颗粒分布指数（&beta, 值）

Abstract: The removal of suspended fine particles (<30 μm) in high density recirculating aquaculture system is the key to water environment regulation. In this paper, the Coulter particle size analyzer was used to analyze the temporal and spatial distribution of suspended fine particles in the recirculating aquaculture system for Salmo salar. The results showed that: in the system, the particles with particle size of 1~3μm, 3~15μm and 15~30μm accounted for 98.36%, 1.63% and 0.01%, respectively. The number, total volume and total surface area of suspended fine particles in the system were (0.54~1.5)×106 /mL, (0.97~6.3)×106 mm3/mL and (0.24~1.3)×107 mm2/mL, respectively; for the particle number distribution, with the decrease of particle size, the number of particles increased rapidly; for the volume distribution, the larger the particle size, the larger the total volume of particles; for the surface area distribution, with the increase of particle size, the total surface area decreased first and then increased; foam separator and submerged biofilter showed strong retention ability of suspended fine particles. The purpose of this study is to reveal the distribution of suspended fine particles in a stable circulating aquaculture system, and provide theoretical guidance and reference for selecting different solid-liquid separation technologies and improving the removal efficiency of solid particles.

Key words:  recirculating aquaculture system, Salmo salar, suspended fine particles, particle size distribution (PSD), particle distribution index (β)